Product and Process Engineering - Delft University of Technology


Serhii and Kartik's paper on all aqueous microfluidics has been published in RSC Advances

In this paper, Serhii and Kartik present a method for all-aqueous, continuous microfluidic production of core-shell hydrogel microcapsules. Using the device with a 3D architecture allowed them achieving spontaneous break-up of a water-in-water jet into two-phase core-shell droplets, followed by UV-polymerization of their shells. Produced hydrogel microcapsules with a liquid core displayed excellent stability towards drying and rehydration, as well as to various harsh environments (3 < pH < 13). Their future work aims at controlling the encapsulation and release of cargo by tuning the permeability of the capsules’ shells. Congratulations, Serhii and Kartik!

Dayinta and Lea’s paper has been published in Advances in Colloid and Interface Science

In this article , we focus on the effects of pulsed electric fields on lipid vesicles ranging from giant unilamellar vesicles (GUVs) to small unilamellar vesicles (SUVs), from both fundamental and applicative perspectives. First, we discuss in detail how research on cell-size GUVs as model cell systems has provided novel insight into the basic mechanisms of cell electroporation and associated phenomena. Afterwards, we discuss how electroporation and electrofusion have been used as versatile methods to manipulate vesicles of all sizes in different biomedical applications. Discussion proceeds by summarizing the open questions in the field of electroporation and possible future directions for vesicles in the biomedical field. Congrats to Dayinta and Lea!

Pouyan gave a talk at AERC 2017

Pouyan gave a talk about using DNA to understand the microscopic origin of flow instability of polymer solutions at the Annual European Rheology Conference (AERC 2017) in conjunction with Nordic Rheology conference that took place in Copenhagen, Denmark. The AERC involves rheologists engaged in both industrial and academic research and development and is therefore a common meeting ground for engineers, physicists, chemists and biologists with a common interest in rheology.

Paper on unraveling the mechanism of “Neck" formation in extensional flow is published in Macromolecules

In this paper , Shaurya and Aswin study and describe the conformation of polymer molecules during thinning and necking of polymeric droplets in an extensional flow provided by using microfluidics. To unravel the molecular picture behind these phenomena, we integrate a T-shaped microfluidic device with advanced fluorescece microscopy to visualize stained DNA molecules at the stagnation point within the necking region. We find that the individual polymer molecules suddenly stretch from their coiled conformation at the onset of necking. Congrats to Shaurya and Aswin for a very nice paper!

A Delft Global Project (Getting HOT) has been awarded.

Aedes mosquitoes are transmitters of viruses that can cause tropical diseases that are often accompanied with high fevers that can turn lethal. When a patient has a fever, it is often difficult to quickly make the right diagnosis of the underlying disease. In this project Eduardo Mendes (ASM), Luigi Sasso (3me), and Pouyan Boukany (PPE) will develop a colour sensor chip to simultaneously detect three viral tropical diseases: Zika, dengue and chikungunya, in a fast and affordable way. The chip, once integrated into a piece of hardware connected to a portable (or satellite) phone - telemedicine - will allow humanitarian missions to access virtually any region on the globe. Congrats to Eduardo, Luigi and Pouyan!

Paper on atomic and molecular layer deposition published in Chemical Communications

In this article, we present the recent developments in the fields of ALD and MLD with regard to the bottom-up synthesis of novel nanostructured materials. In particular, we provide for the first time a critical overview of the effects of the process conditions on the synthesis. Congratulations Hao and Fabio!

Paper on elastic instabilities during polymeric fluid flow in porous media published in Soft Matter

In this paper , Durgesh and Esteban describe how elastic instabilities occur during flow of polymeric fluids in porous media. We find that polymer solution flowing through a model porous media (Wi > 1) shows two distinct elastic instabilities. In the shear-thinning regime, we observe stationary dead zones upstream of the pillars. At higher shear rates (Wi), these dead zones are periodically washed away. Congrats to Durgesh and Esteban for a very nice paper, and thanks to our collaborators and co-authors Pacelli Zitha and Bill Rossen in CITG!

Upcoming event: Free workshop on DVS and iGC SEA Sorption Techniques – the Latest Applications

This free workshop covers in-depth Dynamic Vapor Sorption (DVS) and Inverse Gas Chromatography – Surface Energy Analyzer (iGC-SEA) techniques.

Speakers from industry and academia will discuss DVS and iGC-SEA, from theory to common applications and present real case studies. In addition, an instrument demonstration will follow after the presentations.

Date: 12 January 2017

Time: 10am – 2:30pm (CET)

Venue: Delft, Netherlands

Faculty of Applied Sciences, Dept. Chemical Engineering

Van der Maasweg 9, 2629 HZ Delft

Please find here the link to the invitation.

Andrea Fabre graduated on her PhD thesis

Andrea Fabre successfully defended her PhD thesis titled 'Fluidized Nanoparticle Agglomerates: Formation, Characterization, and Dynamics'. Congratulations Andrea!

Maulik Shah won MSc thesis award

The alumni association of the Transport Phenomena group of TU Delft awarded Maulik Shah the best MSc thesis award 2016. Maulik's MSc work was on characterizing foam used in deliquification of gas wells, mainly focusing on the rheology of foams and its liquid content. Congrats Maulik!

Jing Guo won silver award at the 3rd International Conference on ALD applications

On the 3rd International Conference on ALD Applications 2016 in Suzhou near Shanghai, our PhD student, Jing Guo won the silver award for her student poster presentation. Congratulations Jing!

Need fast mixing inside droplet microfluidics? Check out our recent work in RSC Advances by Yogesh and Michael!

Yogesh and Michael investigated separately the dependence of the mixing time on size and velocity of micro-droplets moving through serpentine channels. They show that the mixing time scales linearly with droplet size. Entire experimental data collapse on a master-line, when the convective time scale is multiplied by the dimensionless droplet size.

Pouyan Boukany granted tenure

We are proud to announce that Dr. Pouyan Boukany has been granted tenure by Delft University of Technology. Dr. Boukany joined PPE five years ago, and established his own research team in soft (living) matter, with a focus on advanced methods for manipulating cells. He has a strong international network in this area, and has published several great papers on the boundary of chemical engineering and life sciences, just the area we want to strengthen as a department. Congrats Pouyan!

Mini symposium on scalable production of nanostructured materials on October 28th, 2016

On the 28th of October Prof. Ruud van Ommen gives his inaugural lecture: “From Chemical Engineering to Scalable Nanotechnology” at 15:00 in the Aula of TU Delft. In connection with this special event, we organize a mini-symposium “Scalable Production of Nanostructured Materials” on the same day starting at 09:00 in the Kronigzaal. For registration or questions you can contact Samir Salameh or Melvin ten Kate at Click here for more details.

Volkert van Steijn: Teacher of the Year 2016 for the Faculty of Applied Sciences

Volkert van Steijn received the Teacher of the Year award for the faculty of Applied Sciences. The award is handed to teachers who went the extra mile for their students. Candidates are nominated through election by students. Having won the teacher of the year award for the Faculty of Applied Sciences in 2013 and for the Chemical Engineering programs (Molecular Science and Technology (MST) and Chemical Engineering (CE)) in 2014, it is the third time in the last 4 years, that Volkert has won the Teacher of the Year award. Congratulations Volkert!

Fabio Grillo wins third prize for the best student talk at ALD 2016 in Dublin!

Fabio received third prize for the best student talk at the ALD2016 conference (16th Atomic Layer Deposition Conference) held in Dublin on 24-27 July 2016. Congrats Fabio!

Congrats to Hao and Fabio for their recent paper on application of ALD to synthesize bulk quantities of Graphene supported Palladium nanoparticles

In this paper we show that by carrying out atomic layer deposition (ALD) in fluidized bed reactors one can bring the nanoscale precision of ALD to the synthesis of bulk quantities of graphene-supported Palladium nanoparticles (NPs). In doing so, we also make great strides towards the understanding of the role of sintering during the formation of NPs in ALD of noble metals.

Congrats to Lea and Durgesh on their review paper, that has recently been published in BIOMICROFLUIDICS (special issue on Microfluidic Rheology)!

In this review paper , we discuss some of the main concepts governing the flow of DNA molecules in micro/nanofluidic devices as well as applications.In particular, we review some of the main advances made in polymer physics using DNA molecules to test long-standing predictions as well as the dynamics of DNA molecules in shear, extensional, and other types of flows. The discussion proceeds to the dynamics of DNA molecules under confinement particularly in nano-fluidic systems and through nano-pores. The paper concludes with relevant applications in the manipulation of single molecules that can be used, for example, to inject DNA into cells.

Kartik Totlani, Dominik Benz, Lea Rems and Melvin ten Kate joined our group recently. Welcome!

Our group recently expanded with the inclusion of two PhD students, Kartik Totlani and Dominik Benz and two Post-Docs, Lea Rems and Melvin ten Kate.

Kartik, who completed his M.Sc. from ChemE TU Delft started his Ph.D in January with Volkert van Steijn, Michiel Kreutzer and Walter van Gulik (Biotechnology department). He would be working on high-throughput screening of microorganisms in the fed-batch mode using droplet microfluidics.

Dominik started his PhD in Feb and will be working on a Delft Global project , with Ruud van Ommen and Hao Bui on “Graphene based metal oxide photocatalysis for water cleaning“. He graduated in 2015 at the Friedrich-Alexander University of Erlangen-Nuremberg, Germany, in Molecular Nano Science where he focused on “Buffer layer for thin film solar cells by atomic layer deposition (ALD)”. In his future research he will be developing photocatalytic materials using ALD. These will be applied in a reactor to provide clean drinking water in developing countries, such as Vietnam.

Lea will be working with Pouyan Boukany on his ERC project regarding electroporation. She received her B.S. in electrical engineering in 2012 and a Ph.D. in 2016 from the University of Ljubljana, Slovenia. Her main research interests include combining theoretical and experimental analyses of biological processes, in particular cell membrane electroporation, by applying methods such as numerical modeling, molecular dynamics simulations, and in vitro experiments.

Melvin will be working with Ruud van Ommen and Bert Hintzen (Luminescent Materials Group) on a project in cooperation with Xiamen University, China. The project involves coating luminescent materials with ALD in order to increase their lifetime and enhance their performance. Melvin received his MSc degree in Chemical Engineering at Eindhoven University in 2010 and his PhD at Delft University in 2014. For the last 18 months, Melvin worked as a post-doctoral researcher at the National Institute for Materials Science in Tsukuba, Japan. His main fields of research include photoluminescence, nitridosilicate based phosphors, lanthanides, LEDs and solar cells.

PPE group welcomes you all!

PPE moves to the new building in mid-June

As part of the reorganisation of the faculty of Applied Sciences, the departments BioNanoscience, Chemical Engineering and Biotechnology will move to a new building . The new building is at the very south of the TU campus, Van der Maasweg 9, next to the Reactor Institute Delft.

Dr. Rajat Bhardwaj got interviewed by the Delta magazine

Our former PhD student, Rajat's research featured in the Delta magazine . His research was on finding sustainable technological solution (solar still) to provide drinking water to the poor in the developing countries. He discusses his experiences, motivations and outlook in the interview . PPE group congratulates Dr. Rajat Bhardwaj!

Samir Salameh has won the Science Slam in Bremen!

With his enthusiastic 10-minute speech, he introduced the non-expert audience to capillary forces between particles. Samir connected his own research on powders with the building of the pyramids in ancient Egypt. His talk was so much appreciated, that he received 58 out of 60 points. Well done Samir!

Ruud van Ommen appointed as Antoni van Leeuwenhoek professor

Delft University of Technology has appointed Ruud van Ommen as Antoni van Leeuwenhoek professor. These chairs are early promotions of young, outstanding scientists to the position of professor, enabling them to develop their scientific careers to the fullest extent at the university. Ruud van Ommen (42) received his MSc in Chemical Engineering in 1996 and his PhD 2001, both at Delft University of Technology. He has been working as a faculty member at the Chemical Engineering Department since then, with stints at Chalmers University (Sweden) and the University of Colorado (USA). His research interests are solids processing, reactor engineering, and scaling-up nanotechnology. Dr. van Ommen currently focuses on bringing manufacturing of advanced materials for energy and health applications from lab to industrial scale. He co-founded the fast-growing spin-off company Delft IMP, and co-organized several national and international conferences in his field. He has co-authored over 100 publications in peer reviewed journals, several book chapters and patents. He has been the recipient of prestigious personal grants, such as ERC Starting (2011) and ERC Proof of Concept (2012 & 2015) grants. In addition to all this, he teaches in the curricula of Sustainable Energy Technology and Chemical Engineering, where the students value him as a dedicated and able teacher.

Paper on shear banding at micron-scale gap published in Soft Matter

Our joint work with the groups in the Ohio State University and University of Akron has been published in Soft Matter. We show how molecular parameters such as slip length influence the shear inhomogeneity of entangled liquids during shear in a small gap. By reducing the slip length, wall slip can be replaced by bulk shear banding.The "paper" is available on the Soft Matter website. This "work" is also highlighted as back cover of soft matter.

Keynote (Pouyan) and oral (Dayinta) presentation at the World Congress on Electroporation

Pouyan Boukany presentes a keynote lecture at 1st congress on electroporation on Tuesday September 8. His talk is titled "A Nanochannel-Electroporation chip for interrogating cancer cells at the single-cell level". Dayinta gives an oral presentation entitled “A Correlation between Critical Breakdown Voltage and Mechanical Properties of Linear and Branched Lipid Bilayers” at this congress.

Delft IMP in top 10 European cleantech competition

On September 4th, Delft-IMP was awarded with the 9th position in the European finals of the Climate Launchpad business idea competition, with our scalable technology to produce highly efficient nanostructured catalysts. Delft IMP is a spin-off company from the Product & Process Engineering (PPE) group at Delft University of Technology. The company is commercializing a new manufacturing method to produce nanostructured particles at industrially relevant scale, allowing a new generation of highly efficient catalysts to enter the market. Applications include improved catalytic converters in cars, lowering the dependency on valuable resources such as platinum and reducing environmental impact, but also improvements in refining processes, reducing the carbon footprint and enabling the transition to biofuels and bioplastics. Climate Launchpad is a EU subsidized initiative to support cleantech startups defining their business proposition. This year, over 700 start-ups from 28 countries submitted their initial business ideas. Since spring, selected participants have gone through a demanding programme to work on their business idea: a 2-day boot camp, intensive business coaching and competing in national finals. In the finals on September 4th, 15 of the most promising business ideas had the opportunity to pitch in front of a renowned international jury, where Delft IMP was awarded with the 9th position, giving entry into the ClimateKic Accelerator, an 18-month program to help deliver our product to the customer.

Pouyan Boukany gave an Invited Lecture at 37th conference of EMBS

Pouyan Boukany gave an invited lecture entitled “Affordable Techniques for Fabricating Large Array of Functional Nanowires: From DNA to Micellar Systems” at the 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBS). The Theme of the Conference remarks the central role of BME in the improvement and innovation of health care (with a direct impact on the quality of life) but also focuses on how to reach and maintain a “wellness” through proper and advanced technologies, devices and protocols.

Henk Nugteren Teacher of the Year 2015

For the third year on a row, the best teacher award goes to one of the faculty members of the PPE group. Incredible enough, the three teachers nominated for this election based on the votes by students from the BSc and MSc programs in Chemical Engineering were all from our group. Michiel Kreutzer, Volkert van Steijn, and Henk Nugteren. Michiel received the award in 2009, Volkert both in 2013 and 2014, and this year the award goes to...Henk! Congrats!

Great Annual European Rheology Conference Attendance in Nantes

The “Groupe Français de Rhéologie” will host the 10th Annual European Rheology Conference in Nantes, France, from April 14 to April 17, 2015. Durgesh Kawale presented his work on the flow of polymer solutions through porous media.

23rd International Conference on Bioencapsulation

Bioencapsulation is a method commonly used for diverse application including food, agriculture and pharmaceutical to extend shelf life, controlled release and increase effectiveness of the (bio)molecules and biological systems. We are pleased to announce that the 23th International Conference on Bioencapsulation will be held in Delft, September 2 - 4, 2015. Please check link for details on agenda and registration dates.

Save the date! PPE International Dinner April 10th

On April 10th we are organizing an international dinner for the PPE group. So, prepare a dish that is traditional to your culture or country and let's experience each other culture! Let us (Teun or Anouk) know if you will be joining us for this dinner. Looking forward to see you on April 10th!

Paper on precursor utilization in ALD just published in Chemical Engineering Journal

Atomic layer deposition (ALD) carried out in a fluidized bed is an attractive method for making nanostructured particles, e.g. for catalysis or batteries. For scale-up it is a prerequisite that the ALD precursors are efficiently used, as they represent a major operating cost. Our paper aims at understanding and optimizing the precursor utilization efficiency using a multiscale modelling approach. We show that fluidized-bed ALD on high-surface-area powders is a forgiving process that can be carried out with virtually no precursor waste.

Group excursion to Heineken

As a team of researchers trying to understand the fundamentals of science for a better tomorrow, we at team-PPE work really hard. At the same time, we keep our souls cheerful by partying even harder!!! Yesterday, we visited the Heineken brewery in Zoeterwoude, where we enjoyed the impressive tour view and of course, the beer. Cheers...!!!

Paper on volumes of micro droplets just accepted in RSC Advances

The paper present a theoretical model to calculate the volume of non-wetting bubbles and droplets in segmented microflows from given dimensions of the microchannel and measured lengths of bubbles and droplets. Despite the importance to know droplet volumes in interpreting experiments of reaction kinetics and transport phenomena, an accurate model did not yet exist. The paper teaches experimentalist how to accurately translate droplet lengths into droplet volumes; all you need to do is follow the recipe is Fig. 3 of the paper; RSC Advances, 2015, 5, 16042-16049. DOI: 10.1039/C4RA15163A

Upcoming Phd Thesis defense Michiel Musterd - 04-02-2015

Michiel Musterd will defend his PhD thesis entitled `On the Interaction of Capillary Shapes with Solid Surfaces'on Wednesday Feb 4, 2015, at 10:00. Prior to his defense, at 9:30, he will give a short introduction on his work (in Dutch). Let's all go there to support Michiel.

Van Gogh Grant for deepen Pouyan's collaboration with Mounir Tarek’s group (in Université de Lorraine)

Pouyan Boukany has been awarded a Van Gogh travel grant by Nuffic to deepen his collaboration with Prof. Mounir Tarek to investigate electroporation of cell membranes at the molecular level (by both MD simulations and experimental approaches). The grant allows people from both groups to spend some time at each other's institutes. Van Gogh grant holders are excellent researchers with an outstanding tenure track and international exposure. Prospective candidates include, among others, Veni, Vidi Vici scholars, French and Dutch ERC scholars, Spinoza Price winners, members of De Jonge Academie and their French counterparts. Congrats!

Successful Alumni Event @PPE

On the 19th of September the first Product & Process Engineering group reunion took place. The event was a big success as more than 40 alumni along with 35 current group members joined. The program opened with registration and welcome-coffee in the faculty room. The event included a welcome by Michiel Kreutzer, and a presentation by Ruud van Ommen, wherein current group structure, research areas and achievements were presented to the audience. This was followed by well-organized lab tours by joint efforts of enthusiastic students for the alumni to share and exhibit the ongoing research in the group. The event was concluded through a fantastic dinner in the ChemE garden with several tender and delicious barbecue cooked dishes.

Michiel Musterd in University Magazine

The work by Michiel Musterd that was recently published in Physical Review Letters was picked up by the University Magazine ``Delta", who interviewed Michiel about his findings. The article just appeared online and will appear in press in issue 47,1. Well done, Michiel!

Phys. Rev. Lett. on Local and Global Hysteresis now published.

We proudly announce that our most recent work on pinning of droplets has just been published in Physical Review Letters. The paper by Michiel Musterd, Volkert van Steijn, Chris Kleijn and Michiel Kreutzer is entitled "Droplets on inclined plates: Local and global hysteresis of pinned capillary surfaces" and deals with a theory that accounts for constrained contact line motion. Including this constrained motion in the model allows a description of previously unexplained phenomenon for droplets on inclined plates. The theory paves the road to a fully predictive model of droplet pinning by identifying the effect of the droplet width as the sole contributor to the history effects at roll-off.

Volkert van Steijn granted tenure.

The Department of Chemical Engineering is proud to announce that Dr. Volkert van Steijn has been granted tenure by Delft University of Technology. Dr. van Steijn joined ChemE as an assistant professor on tenure track in 2009, with the ambition to further strengthen the department in the area of microfluidics. In particular, he wanted to expand these activities into life sciences. In the last five years, he has worked with students here in Delft and with scientists across the globe (notably prof. Weitz at Harvard and prof. Garstecki in Warsaw), resulting in a portfolio of granted projects and published results that more than warrants tenure. In addition to the scientific output, he has a stellar record in teaching, winning the excellence in teaching award of our B.Sc. program for two years in a row. Volkert, congratulations!

Volkert van Steijn receives Teacher of the Year award for the MST/CE programs.

For the second year on a row, Volkert van Steijn receives the teacher of the year award for the Chemical Engineering programs (Molecular Science and Technology (MST) and Chemical Engineering (CE)). Congrats!

Two out of the three nominees for the Teacher of the Year award 2014 in the MST/CE program from PPE.

Michiel Kreutzer and Volkert van Steijn are both nominated for the teaching award for the MST/CE programs. They both won the award for best Teacher of the Faculty of Applied Sciences before, Michiel in 2009, Volkert in 2013. On Thursday June 19 the TNW Teacher of the Year Awards Ceremony will take place. The ceremony will start at 16:00 in the Faculty Room of the ChemE building, Julianalaan 136. Afterwards, drinks will be served. Students and teachers are more than welcome.

Former PPE member Lilian de Martin has won a poster award in the UK!


Former PPE member Lilian de Martin, who is currently a research associate at University College London, has won a poster award in the UK! At the ChemEngDayUK 2014 she presented a poster titled “Multidimensionality in fluidized nanoparticle agglomerates”. This poster described the work she carried out in Delft, and had Andrea Fabre, Wim Bouwman and Ruud van Ommen as co-authors. Lilian obtained the first prize in one of the six sessions of the event. For more info:

PPE’s research featured as cover story of Small and Advanced Healthcare Materials journals in one week (May/2014)

A team in chemical engineering (PPE, ASM and OM) has developed a new method to generate large arrays of micellar nanowires. On the front cover of Small journal our recent work has been highlighted with an image illustrating a novel, simple, and affordable method for generating a large array of laterally ordered soft nanowires from worm-like micelles. These micellar nanowires can be successfully decorated with hydrophobic molecules that incorporate into the micelle core or with hydrophilic nanoparticles such as quantum dots entrapped in the corona. This platform should enable new opportunities in functional nanoscale devices, especially bio-chemical sensors.


In the second publication, scientists from Delft, Ohio State and Duke University have found a safe and efficient way to deliver nanoparticles containing a wide range of biomolecules into living cells without going through the endocytosis route, by applying electrical pulses through a nanochannel. Pouyan E. Boukany, L. James Lee, Kam W. Leong and colleagues present a novel platform for in vitro nucleic acid delivery in regulating gene expression that holds great potential in advancing fundamental biological science and modifying cells for biomedical applications. This work has been recently published as the inside front cover story in Advanced Healthcare Materials, which is an international, interdisciplinary forum for peer-reviewed papers on materials science aimed at promoting human health. Read more about publications:

  • Generating Aligned Micellar Nanowire Arrays by Dewetting of Micro-patterned Surfaces, P.J. Glazer, L. Bergen, L. Jennings, A. J. Houtepen, E. Mendes and Boukany, P.E.*, Small, 9, (2014), 1657. DOI: 10.1002/smll.201303414.
  • Nonendocytic delivery of lipoplex nanoparticles into living cells using nanochannel electroporation, Boukany, P.E.,* Wu, Y., Zhao, X., Kwak, K., Glazer, P., Leong, K., Lee, L.J., Advanced Healthcare Materials, 5 (2014), 682. DOI:10.1002/adhm.201300213.

Oral from our group in the World Conference in Powder Technology 7, in Beijing

Logo of the conference

Our group will give five presentatons in the World Conference in Powder Technology 7, in Beijing. (

  • Merel Oostveen, “Elucidation of the rehydratation behaviour of food powders”.
  • Stefan de Koster, “Geopolymer coating of bacteria-containing granules for use in self-healing concrete”.
  • David Valdesueiro, “Elucidating the effect of electrostatics and hydrogen bonding on the fluidization of fine cohesive powder”.
  • Gabrie Meesters, “The best was yet to come”.
  • Ruud van Ommen, “Atmospheric-pressure atomic layer deposition of noble metal nanoclusters on support particles”.

PPE organized Image Capturing and Processing Workshop for ChemE on 10.04.2014

On April 10, 2014 PPE group organized an intersting workshop on Image Capturing and Processing. Three invited speakers delivered engaging and informative talks on capturing images using various techniques, state-of-the-art facilities at ChemE of TU Delft. The workshop also covered image processing talk focused on fetching quantitaive information useful for scientific analysis. Invited Speakers: Dr. Bernd Rieger (TU Delft), Dr. Piotr Glazer (Tu Delft, PPE), and Evert Wagner (TU Delft, TP).

Dr. Piotr Glazer joined PPE as a Postdoc. Welcome!

Picture of Piotr

Piotrs received his PhD degree in Advanced Soft Matter gorup at TU-Delft. Piotr will work with Pouyan Boukany on single Cell Electroporation in the scope of his ERC starter grant. A warm welcome to him!

Pouyan Boukany gave a lecture about DNA Dynamics and Electroporation in BPS meeting

Pouyan Boukany gave a lecture entitled “Single Cell Electroporation and DNA dynamics: From Bulk to Micro/Nano-Fluidics” at the 58th annual meeting of Biophysical Society! The aim of this meeting is about the Bridging the Sciences to explore Biological problems.

Need Amphiphilic Nanowires? Check out our recent work in Small by Piotr Glazer and Leo Bergen!

Worm-like micellar fluids may be used in fracturing fluids in oil fields, but they could also one day help us to create core/shell nanowires for bio/chemical sensing applications, thanks to a new and simple de-wetting approach developed at TU-Delft. A team in chemical engineering has developed a new method to generate large arrays of micellar nanowires, which are capable of trapping both hydrophilic and hydrophobic molecules. We wrote this paper as a result of Leo’s Bachelor Project by collaboration among PPE, ASM & OM. The paper is available on the Small website. Congrats!

Mahsa Motegh graduated on her PhD thesis: Design of photocatalytic reactors

Wednesday 30th of October 2013, Mahsa Motegh succesfully defended her PhD thesis. Congratulations Mahsa!

Great AiChE 2013 Annual Meeting Attendance

PPE was very well represented at the AIChE annual meeting: Michiel Kreutzer, Ruud van Ommen, Gabrie Meesters and Lilian de Martin were present. In total, 13 presentation on research by PPE very given: ranging from microfluidics to fluidizing nanoparticles, and from Fischer Tropsch synthesis to producing micelles. All abstracts can be retrieved from:

Dayinta Perrier and Hrushikesh Pimpalgaonkar joined our group as PhD students. Welcome!

Our group recently got expanded with the arrival of two new PhD students, Dayinta and Hrushikesh. Hrushikesh will be working with Volkert van Steijn, Michiel Kreutzer and Chris Kleijn (Transport Phenomena group) on phase field of modelling. Dayinta will work with Pouyan Boukany on electroporation in the scope of his ERC starter grant. A warm welcome to both!

Duong Hoang graduated on his PhD thesis: "Breakup of confined droplets in microfluidics"

Wednesday 16th of October 2013, Duong Hoang succesfully defended his PhD thesis in his characteristic relaxed but crystal clear way of discussing. Afterwards there was a great party to celebrate his achievement. Congrats Duong!

Gallery of Fluid Motion submission - Droplets on a Tilted Plate

Accompanying the annual meeting of the American Physical Society - Division of Fluid Dynamics there is a Gallery of Fluid Motion. Videos for this gallery show the science and often beauty of fluid dynamics. In their submission for 2013, Michiel Musterd, Volkert van Steijn, Chris Kleijn and Michiel Kreutzer show the role of deposition history in the classical experiment of a droplet tilted on a plate. Details of the experiment are described in the accompanying description posted on

Volkert van Steijn: Teacher of the Year 2013 for the Faculty of Applied Sciences

Volkert van Steijn received the Teacher of the Year award 2013 for the faculty of Applied Sciences. The award is handed to teachers who went the extra mile for their students.

Adv. Healthcare Mater. paper on Nonendocytic Delivery of Nanoparticles into living cells now published!

Scientists from Delft, Ohio State and Duke University have now found a safe and efficient way to deliver nanoparticles containing a wide range of biomolecules into living cells without going through the endocytosis route, by applying electrical pulses through a nanochannel. The approach effectively facilitates the cellular uptake and release of siRNAs, DNAs and large plasmids from nanoparticles. This new concept provides a convenient, safe, and efficient approach for nucleic acid delivery in regulating gene expression. The paper is available on the Adv. Healthcare Mater. website. This work is also highlighted in MaterialsViews as Non-viral nanoparticle vectors delivering biomolecules more efficiently.

CEJ paper on scale out of segmented flow microreactors just accepted

This paper describes how to distribute bubbles over many parallel channels by breaking the bubbles at subsequent T-junctions as shown in the artist impression. It is one of the four paper resulting from the PhD work of Duong, this paper being the most applied. Other, more fundamental, papers were recently accepted in the Journal of Fluid Mechanics, and Computers & Fluids. Big compliment to Cees Haringa, as the paper is the first one that directly results from his MSc thesis work.

Papers Ruud van Ommen selected for RSC collection “Rising Stars and Young Nanoarchitects in Materials Science”

The Royal Society of Chemistry (UK) has just published a web theme collection of the Journal of Materials Chemistry and related journals called Rising Stars and Young Nanoarchitects in Materials Science. This collection of 38 papers from top young researchers contains two papers by Ruud van Ommen and co-workers: M. Tahmasebpoor, L. de Martin, M. Talebi, N. Mostoufi, J.R. van Ommen. The role of the hydrogen bond in dense nanoparticle-gas suspensions. Phys. Chem. Chem. Phys. 15 (2013) 5788. A. Goulas, J.R. van Ommen (2013). Atomic layer deposition of platinum clusters on titania nanoparticles at atmospheric pressure J. Mat. Chem. A 1 (2013) 4647. While the first paper focuses on the flow and interaction of nanoparticle agglomerates, the second paper describes how to use these systems to make novel nanostructured materials.

Pouyan Boukany gave an Invited Lecture at 7th IDMRCS

Pouyan Boukany gave an invited lecture entitled "Building conceptual and phenomenological foundation for nonlinear rheology of entangled polymers" at the 7th international discussion meeting on relaxations in complex systems. The aim of this meeting is to recognize the benefits of an interdisciplinary effort in the research of relaxation in complex systems and bringing together researchers from different disciplines.

Catalysis Science and Technology by Katja Kruit

The paper on selectivity in Fischer-Tropsch by lead author Katja Kruit is out in Catalysis Science and Technology. Katja wrote this paper as a result of her MSc thesis! The work explains why product distributions in Fischer-Tropsch can deviate from the Anderson–Schulz–Flory distribution, and explains how to calculate the distribution. The paper is available on the Catalysis Science and Technology website.

Veni award for Volkert van Steijn

Volkert van Steijn receives a Veni grant from NWO-STW. The Veni grant aim to support young researchers who are about to consolidate their own research line. The overall aim of the project is to enable screening of micro-organisms (yeast in particular) under industrially relevant conditions. To achieve this goal, Volkert will develop a microfluidic tool that enables the study of the growth and performance of yeast mutants inside micro droplets.

Volkert van Steijn nominated for Teacher of the Year of Applied Sciences

Volkert van Steijn is nominated for the Teacher of the Year award 2013 for the faculty of Applied Sciences. The award is handed to teachers who went the extra mile for their students. Candidates are nominated through election by students. On Monday 16 September 16:00 the TNW Teachers of the Year election will take place in the Kronigzaal of the Applied Physics building. Afterwards, drinks will be served. Both students and teachers are more than welcome.

Lecture at the Microdroplets in Action symposium

Volkert van Steijn gives a lecture entitled "all-aqueous droplet microfluidics" at the Microdroplets in Action symposium in Cambridge (UK). The aim of this one-day symposium is to bring together leading scientists working in the area of microdroplets.

ERC Starting Grant for Pouyan Boukany

Pouyan Boukany

Pouyan Boukany is one of the European researchers to have been awarded a European Research Council (ERC) Starting Grant for his research ‘Engineering DNA Transfer into Cells by Precision in Electroporation’. The ERC Starting Grants aim to support young researchers who are about to consolidate their own research team and to start conducting independent research in Europe. The grant is about 1.5 million Euros for a five-year project. The overall aim of this ERC project is to achieve more efficient and safer non-viral gene delivery by elucidating the mechanism of the membrane electroporation and DNA transport at the molecular and subcellular level. In contrast to viral delivery methods, seeking to deliver nakedDNA to cells is considered the best safe alternative for medical applications. Electroporation promises to do just that, but currently it is a crude and inefficient technique at best. Pouyan will tackle this by performing experiments at single cell level and employing single molecule techniques to observe all electroporation process in real time.

Phys. Rev. Lett. paper on bubble-particle interaction now published!

In this paper, Hooshyar et al. experimentally investigate the effect of particles on the dynamics of a gas bubble rising in a liquid-solid suspension while the particles are equally sized and neutrally buoyant. They show that when a bubble rises through a suspension characterized by a low Stokes number (small particles), it will hardly collide with the particles and will experience the suspension as a pseudo-clear liquid. On the other hand, when the Stokes number is high (large particles), the high particle inertia leads to direct collisions with the bubble.

Group BBQ chez Kreutzer - June 14

Friday June 14, we will kick off the summer by having a group BBQ chez Kreutzer. The invitation is for all the present members of the group, so that includes the MSc students, the BSc students, the LO-1/2/3 students, visiting scientists and of course all the group members. All spouses, girl/boyfriends and children and other relevant family-members are of course also more than welcome. Looking forward to this yearly event!

PhD defense Dirk Renckens - June 28

Friday June 28, Dirk Renckens defends his PhD thesis. Please attend the defense to support Dirk. Dirk, good luck with the preparations!

Oral by David Valdesueiro at PARTEC 2013

PARTEC is one of the largest international conferences devoted to all aspects of particle and powder technology, including particle formation processes, particle characterization and measurement methods and equipment, processes such as agglomeration, compaction and coating, formulation and performance of products, and application of particles of any kind. David will give a talk on "Coating fine particles using Atomic Layer Deposition"

ERC proof of concept grant

Ruud van Ommen and Aris Goulas have received an ERC proof of concept grant to investigate the market potential of Atomic Layer Deposition (ALD) coatings to make nanoparticle-based electrocatalysts for fuel cell applications. This grant is a top-up of the ERC starting grant "The Interplay between Agglomeration and Coating of Nanoparticles in the Gas Phase" that Van Ommen received in 2011; the ERC starting grant is more aimed at fundamental research. Congrats!

Paper with Weitz lab and Garstecki lab just accepted

In this paper, the authors introduce a new type of droplet generator in which the volume of droplets depends primarily on the geometry of the droplet generator, and not on flow rates nor on fluid properties. The advantage of the fixed-volume droplet generator is that it ensures generation of droplets of a single size, even in environments in which fluids cannot be delivered at constant rates, or in which the rates are difficult to tune to the requisite values. This is of particular importance to for example point-of-care diagnostic applications.

Compilation video Scienceday 2013

Impression of the Scienceday 2013, an annual event organized by the department of Chemical Engineering of Delft University of Technology. Keynote lectures by the Jan Groenewold and Eke Marien, also known as "Cook & chemists", and by Joris Sprakel of Wageningen University. For more information, contact the organizers: Arjan Houtepen or Volkert van Steijn.

J. Mat. Chem. A paper now online

"Atomic layer deposition of platinum clusters on titania nanoparticles at atmospheric pressure" is the title of the paper by Aris Goulas and Ruud van Ommen that has just been accepted for publication in the Journal of Materials Chemistry A. The paper discusses the deposition of Pt nanoclusters of a narrow size distribution on titania NPs under atmospheric pressure conditions. Great work all!

PCCP paper now online

"The role of the hydrogen bond in dense nanoparticle-gas suspensions" is the title of the paper by Lilian de Martin and colleagues that has just been accepted for publication in the Physical Chemistry Chemical Physics. The paper discusses the important role of hydrogen bonds in dense nanoparticle-gas suspensions. Great work all!

JFM paper on droplet breakup now online

"Dynamics of droplet breakup in a T-junction" is the title of the paper by Duong Hoang and colleagues that has just been accepted for publication in the Journal of Fluid Mechanics. The paper discusses interesting features of the breakup of droplets in confining geometries and is available online now! Congrats!

Upcoming Phd Thesis defense Nasim Hooshyar - 14-01-2013

Nasim Hooshyar will defend her PhD thesis entitled `Hydrodynamics of Structured Slurry Bubble Columns'on Jan 14, 2013, at 15:00. Prior to her defense, at 14:30, she will give a short introduction on her work. Congrats Nasim!

Oral by Barbara Kampa at NCCC XIV

The biggest chemistry and catalysis conference in the Netherlands will take place in Noordwijkerhout in 11-13 March 2013. Barbara Kampa will give a presentation on synthesis of core-shell nanoparticles in microfluidics.

Research Exchange of Barbara Kampa to the National University of Singapore

Barbara will go for a monthly research exchange to National University of Singapore in January 2013. Barbara will be working in group of Saif Kahn in department of Chemical and Biomolecular Engineering on multiphase flow microfluidic devices.

Oral by Lilian de Martin at 65th APD-DFD meeting

Lilian de Martín gave a presentation at the 65th Annual Meeting of the American Physical Society - Division of Fluid Dynamics. Her talk is titled "Two-level hierarchical structure in nano-powder agglomerates in gas media"

Upcoming Phd Thesis defence Iwona Ziemecka - 05-02-2013

Iwona Ziemecka will defend her PhD thesis on Feb 5, 2013, at 12:30. Prior to her defense, at 12:00, she will give a short introduction on her work. Iwona's work is a nice example of a collaboration between the Self Assembling System Group and our group. Iwona pioneered the use of aqueous two phase systems for the production of all-aqueous micro particles in microfluidic devices. Congrats Iwona!

Sinterklaas party at PPE


Last week, our group celebrated a typical dutch tradition: Sinterklaas. Sinterklaas brought presents for everyone as well as poems, which revealed some interesting (read embarrassing) facts about our group members. Looking forward to another great PPE tradition: new years diner chez Kreutzer.

Pouyan Boukany received a Marie Curie Career Integration Grant

Marie Curie logo

Pouyan will use this grant to work on the Single Cell Electroporation and DNA dynamics at nanoscale. Congratulations Pouyan!

Oral (Michiel Musterd) and poster (Pouyan Boukany) presentation at Physics@FOM 2013

Logo Physics@FOM

The large annual conference on physics, Physics@FOM, will be held at the 22nd and 23rd of January. Michiel Musterd en Pouyan Boukany will present their work.

PPE welcomes a new postdoc: Dr. Yogesh Harsheh.

Picture of Yogesh

Yogesh received his PhD degree in Chemical Engineering from ETH Zurich

9th European Congress of Chemical Engineering / 2nd European Congress of Applied Biotechnology

ECCE9 logo

ECCE9/ECAB2, “Shaping a sustainable future: a Partnership of Academia, Industry and Society”, will take place in the World Forum in The Hague, Netherlands from April 21st to 25th 2013. Everyone from the Product and Process Engineering group will participate.

Paper on Fischer-Tropsch reaction-diffusion

Paper on FT reaction-diffusion

The paper on Fischer-Tropsch reaction-diffusion by lead author David Vervloet is out in the new RSC journal: Catalysis Science and Technology. The work explores the massive parameter space of the Fischer-Tropsch reaction without assuming a constant chain growth parameter and provides directions for optimization of the Fischer-Tropsch process. The paper is available on the Catalysis Science and Technology website

Paper accepted on aqueous two phase systems

Paper accepted on aqueous two phase systems

``Slow growth of the Rayleigh-Plateau instabilitie in aqueous two phase system" is the title of the paper by Sam Geschiere and colleagues that has just been accepted for publication in the special issue on multiphase microfluidics in the journal Biomicrofluidics. Congrats!

Michiel Musterd runner-up best poster award at Physics @ FOM 2012

Michiel: runner-up best poster award

Michiel Musterd runner-up best poster award at the Physics @ FOM 2012 meeting, which is the national meeting on Physics in the Netherlands held Jan 17-18, 2012 in Veldhoven.

Nasim Hooshyar presents her work at Physics @ FOM 2012

Nasim: talk at Physics @ FOM 2012

Nasim Hooshyar gave a presentation at the Physics @ FOM 2012 meeting. Her talk is titled "Dynamics of single rising bubbles in a slurry system"

Michiel Musterd presents talk at JMBC Burgersdag 2012

Michiel: talk at Burgersdag 2012 on contact line pinning

Michiel Musterd will give a presentation at the Burgersdag 2012 at January 12th. The Burgersdag is the annual meeting of the Dutch Research School for Fluid Mechanics (JMBC). His talk is entitled: "Influence of Surface Heterogeneities on Droplet Contact Line Pinning".

Ruud van Ommen presents Keynote at IFSA2011

Ruud: Keynote at IFSA2011 on nanopowder fluidization

Ruud van Ommen presents a keynote at IFSA 2011 on Thursday November 17. His talk is titled "How nanopowder fluidization can yield a large contribution to sustainable energy solutions".

Nasim Hooshyar gives presentation at APS-DFD

Nasim: Talk at APS-DFD annual

Nasim Hooshyar will give a presentation at the 64th Annual Meeting of the American Physical Society - Division of Fluid Dynamics. Her talk is titled "Dynamics of single rising bubbles in a liquid-solid system"

Iwona Ziemecka runner-up at the best lecture award
Mojgan Talebi runner-up best poster award at NPS-11

Iwona: Nominated for best lecture award at NPS-11

At the national meeting on process technology NPS-11, Iwona Ziemecka was runner-up at the best-lecture award. She presented her work on micro-structuring aqueous two phase systems using microfluidic methods. Mojgan Talebi, who presented her work on electrospraying was runner-up at the best poster award. Well done, Mojgan & Iwona!

Water-in-water-in-water drops

All water drops in drops

Our paper on ATPS core-shell emulsions is published in Soft Matter. The paper, by lead author Iwona Ziemecka, is the result of a collaboration of the PPE group and the Self-assembling Systems group (PI: Jan van Esch). The work describes how double emulsions (droplets inside droplets) can be made using solutions of polymers in water. The work describes the first time that such a complex architecture could be made without the use of an oil phase. Not having an oil proved to be challenging: Iwona cleverly integrated piezo-electric elements on chip that facilitated the droplet-in-droplet formation. Applications will be related to the fact that the outside fluid, the drop and the inner drop are fully biocompatible.
The paper can be found at the Soft Matter website. Be sure to also check out the movies in the supplementary information!

Seminar by Piotr Garstecki

Piotr Garstecki

Prof. Piotr Garstecki from the Institute of Chemical Physics of the Polish Academy of Sciences will present a lecture invite by Volkert van Steijn. Piotr Garstecki has a wonderful track record in droplet microfluidics, a topic that interests many in our group. Come see his talk in Lecture Room C on Thursday October 19th, 2011 at 12:45. Sandwiches will be provided, first come first serve!

Kreutzer presents Keynote at ECCE

ECCE 2011

Michiel Kreutzer presents an overview of the work of the group at the European Congres of Chemical Engineering (ECCE) in Berlin on Monday, september 26th. The talk is a keynote lecture in the Chemical Engineering session entitled "Drop by drop - multiphase microfluidics in chemical reaction engineering"

ERC Starting Grant for Ruud van Ommen

Ruud van Ommen

Dr Ruud van Ommen has been awarded an ERC Starting Grant from the European Research Council. An ERC Starting Grant is awarded for a period of five years to scientists who lead an independent team or programme and have the potential to become world class researchers. The Grant is about 1.5 million euros. Dr Ruud van Ommen is involved in the use of ultra-thin coatings on nanoparticles. Coated nanoparticles offer future benefits in such fields as catalysis and energy storage and for medical uses. At a fundamental level however, very little is known about how these nanoparticles can be produced under controlled conditions and on a larger scale. Van Ommen aims to change that. The nanoparticles are coated by means of atomic layer deposition (ALD): gas-phase technology from the semiconductor industry used to deposit countless different materials.

Two talks from PPE at the Gas-Liquid-Solid Reactors conference

GLS 10 2011

The PPE group has two talks at the GLS-10 conference in Braga, Portugal this summer (June 2011). David Vervloet's work on structured reactors (with the Catalysis Engineering group here in Delft) will be presented in a talk titled "Multiphase Flow Dynamics in Structured Packings for Tube Reactors." Nasim Hooshyar asks "Can we control the hydrodynamics of slurry bubble columns?". Get the answer at her talk.
Details of the talks are on the GLS website (click the title for more details).

Barbara Kampa Wins NCCC Poster Prize

Barbara Kampa @NCCC

PhD student Barbara Kampa has won the award for the best poster for promising young scientist at the twelfth Netherlands' Catalysis and Chemistry Conference NCCC-XII, which was held in Noordwijkerhout from February 28 until March 3, 2011.
The poster was entitled: 'Synthesis of Gold Nanoparticles in Microreactors', by Barbara M. Kampa, J. Ruud van Ommen, Freek Kapteijn and Michiel T. Kreutzer.
The price consists of a plaque and 500 euros, sponsored by VIRAN.

Prof. Kreutzer recieves teacher of the year award

Prof. Kreutzer (DCT-PPE) who has won The Teacher of the Year 2009 award for the MST programme. In this yearly election, organised by the student associations Het Technologisch Gezelschap, LIFE and VvTP, the students are given the opportunity to vote for their favorite teacher and in this way express their appreciation for good teaching. Congratulations!

Prof. M.T. Kreutzer (DCT/PPE) wins Hoogewerff Jongerenprijs 2009

The winner of the Hoogewerff Foundation Promising Scientist Award for 2009 is Professor M.T. Kreutzer. Every two to four years, the Foundation gives the award to a promising scientist aged under 40 who has made an outstanding contribution to the field of chemical engineering. The Hoogewerff Award is a major acknowledgement of the winners talent and an incentive for his or her future career. Professor M.T. Kreutzer has been working at TU Delft's Faculty of Applied Sciences since 2008. He has conducted groundbreaking research in microfluidics and transport phenomena in capillaries and capillary bundles such as monoliths, and their application in chemical engineering and biotechnology.

David Vervloet receives poster award at NPS8

David Vervloet has won the best poster award at the Netherlands Process Technology Symposium NPS8, which was held in Veldhoven on October 28 and 29, 2008. David is a PhD student in the Product & Process Engineering group of DelftChemTech. Under the guidance of Ruud van Ommen, John Nijenhuis and Freek Kapteijn, he is working on structured reactors for Fischer-Tropsch synthesis. His poster was selected from about 140 poster presented by researchers working in chemical engineering and related areas. The award comprises an amount of 2250 Euro, to be spent on a conference of choice. David is looking forward to the next conference of the Hawaii Natural Energy Institute.

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