I'm Tamás Prileszky,
a ChemE Ph.D. student
at University of Delaware.


I'm a fifth-year graduate student at University of Delaware in the Chemical and Biomolecular Engineering department. I work in Eric Furst's group on creating new colloidal materials. Thus far, the majority of my work has been on endoskeletal droplets, which are oil-in-water emulsions that can hold non-spherical shapes. I have also worked in Australia, creating non-spherical aerosol droplets in an international collaboration. Whether in aerosols or emulsions, controlling the shape of liquid interfaces allows us to create materials that more efficiently find, deposit on, and adhere to target surfaces, which are critical considerations when designing delivery vehicles for anything from cosmetics to pharmaceuticals.

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Some highlights

My research experience

August 2013 - Present

University of Delaware, Newark, DE

PI: Eric Furst

My primary focus at the University of Delaware has been creating materials called endoskeletal droplets—oil-in-water emulsions with an elastic internal network—that can retain non-spherical shapes. I have developed microfluidic techniques for producing these droplets individually or assembling them into larger, hierarchical structures. I have mentored several undergraduate students who have expanded the work on endoskeletal droplets, demonstrating particle adsorption to droplet interfaces and printing of endoskeletal droplet fibers.

February 2017 - May 2017

University of New South Wales, Sydney, Australia

PI: Patrick Spicer

In Australia, I designed and tested new equipment to create non-spherical aerosol droplets in an international collaboration between University of Delaware and University of New South Wales. The full system was designed and assembled from first-principles, including heat transfer units and the aerosolization device. During the collaboration, I mentored an undergraduate student who studied the adsorption characteristics of non-spherical emulsions onto macroporous substrates.

My teaching experience

April 2017 - May 2017

University of New South Wales, Sydney, Australia

Teaching assistant

Developed assignments, exam materials, and tutorial content "Process Modeling and Analysis" and "Complex Fluid Microstructure and Rheology" courses. In addition, I taught tutorial lectures involving scientific demonstrations and review material.

August 2014 - December 2014

University of Delaware, Newark, DE

Teaching assistant

Planned and led weekly lectures for 92 students in the computer lab of a Process Control and Dynamics course. I also graded homework and lab assignments from lecture and computer lab and held independent office hours. I received the Robert L. Pigford Teaching Assistant Award for this course.

November 2010 - June 2013

Gymnastika, Arvada, CO

Gymnastics coach

Independently coached the recreational boys gymnastics program with classes of up to 20 students. I also substituted for team and recreational girls gymnastics coaches.

September 2006 - May 2010

The Sundance Studio, Monument, CO

Gymnastics coach

Coached level 4, 5, and 6 team boys—intermediate, competitive levels—and recreational students and fostered team skills and leadership abilities. Trained students of varying mental and physical abilities, including handicapped children.
2009: level 4 boys won 1st in USA Gymnastics (USAG)—the governing body for gymnastics in the United States—state competition; level 5 boys placed 3rd.
2010: level 4 boys won 3es in USAG state competition.

My education

August 2013 - Present

University of Delaware

Ph.D., Chemical Engineering

GPA: 4.0/4.0

August 2010 - May 2013

Colorado School of Mines

B.S., Chemical Engineering

GPA: 3.954/4.0
summa cum laude


Fluid networks assembled from endoskeletal droplets Alexandra V. Bayles, Tamás A. Prileszky, Patrick T. Spicer, and Eric M. Furst Langmuir, 2018, 34 (13), pp 4116–4121 DOI: 10.1021/acs.langmuir.8b00469

A model of internally structured emulsion droplets is presented that accounts for the traction forces generated by interfacial tension and the von Mises yield criterion of the internal supporting network. For symmetric droplets, the method calculates the total stress acting on a droplet locally, allowing droplet stability and location of failure to be predicted. It is not regions of high interfacial curvature that prompt droplet reconfiguration, rather regions transitioning from high to low curvature. The model enables the design of emulsion droplet response and reconfigurability to external triggers such as changes in surface tension (surfactant concentration) and temperature.

Chemistry of Materials
Fluid networks assembled from endoskeletal droplets Tamás A. Prileszky and Eric M. Furst Chemistry of Materials, 2016, 28 (11), pp 3734–3740 DOI: 10.1021/acs.chemmater.6b00497

Anisotropic endoskeletal droplets are produced continuously in a microfluidic device. The device temperature is controlled such that droplets are formed in a fluid state and subsequently cooled to crystallize an internal network that retains an anisotropic shape. Droplets that are forced to collide after crystallizing partially coalesce to form linear droplet superstructures with tunable rigidity. Superstructure filaments can be folded into larger, three-dimensional percolating fluid networks with tunable porosity and size, which can be further controlled by temperature. The results of this work provide a means of generating hierarchical porous structures with continuous liquid interfaces on demand in a process similar to three-dimensional printing.

Crystallization kinetics of partially crystalline emulsion droplets in a microfluidic device Tamás A. Prileszky and Eric M. Furst Langmuir, 2016, 32 (20), pp 5141–5146 DOI: 10.1021/acs.langmuir.6b00420

We measure the crystallization kinetics of petrolatum-hexadecane emulsion droplets as they are produced in a microfluidic device. After droplets form, they are cooled, causing an interior network of wax crystallites to grow. Polarized light microscopy is used to quantify the droplet crystallinity as a function of residence time in the device. Two wavelengths and two polarization orientations are used to decouple the wavelength dependence of the optical retardation, the crystallite orientation, and the crystallite number density. The droplet crystallinity follows the Avrami kinetic model with parameter values in agreement with the theoretically expected values. These results provide a means to engineer the crystallization kinetics, stability, and arrested coalescence of partially crystalline emulsion droplets.

AIChE Journal
Statistics of droplet sizes generated by a microfluidic device Tamás A. Prileszky, Babatunde A. Ogunnaike, and Eric M. Furst AIChE Journal, 2016, 62 (8), pp 2923–2928 DOI: 10.1002/aic.15246

The distribution of droplet sizes produced in a microfluidic T-junction is modeled using the gamma probability distribution. The proposed model is validated using physical insight from the hypothesized mechanism of droplet breakup and statistically using the Anderson–Darling test. Where signal-to-noise ratio is low and the gamma distribution does not hold, an alternative probabilistic description is used to estimate the true mean of droplet sizes. In addition, a new correlation is developed to relate mean droplet sizes to T-junction inlet flow rates and dispersed-phase viscosity.


The most recent things I've typed

I haven't yet decided if I want to keep this updated. We'll see!



I use an atypical date format, as you may have noticed from my blog posts. The standard American date layout is: mm-dd-yyyy. I find this exceedingly obnoxious, and I’m convinced that the big-endian approach I use (yyyy-mm-dd) is the only variety that makes sense. Yes, I also think you’re being silly, Europe.

TAGS: Miscellany

On Pi

My site used to be on the lazy-man's version of a web server, the kind where you put everything in a template and press "publish." I wasn't fond of how that looked, and the natural response was obviously to give myself more control over the whole thing. Now it's on a Raspberry Pi in my apartment, which is pretty neat.

TAGS: Technology


Let's chat

I'm still working on this bit. My ambition stands directly in the way of my success.

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