Physics of Complex Fluids Group

The research goal of PCF is to understand and to control liquids and their interfaces from molecular to macroscopic scales. Our research connects fundamental phenomena in static and dynamic wetting, nanofluidics, microfluidic two-phase flow, functional surfaces, drop impact, and drop evaporation to practically relevant applications such as enhanced oil recovery, lab-on-a-chip systems, analytical chemistry (MALDI-MS), optofluidics, and inkjet printing.

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Experimental methods and tools: electrowetting, high resolution Atomic Force Microscopy and spectroscopy, (high speed) video microscopy, contact angle goniometry, particle tracking microrheology, macroscopic rheometry, (imaging) ellipsometry, quartz crystal microbalance, Langmuir trough and Langmuir-Blodgett deposition.

Latest news

Special lecture of Prof.dr. Hans Zappe

Adpative Optics.
On Friday, October 28, Prof. Hans Zappe from the IMTEK Institute at the University of Freiburg will provide a colloquium with the title: "Two- and three-dimensional optofluidics". The lecture will take place at 13.30 pm in room ZH 286. Everybody is cordially invited to attend the lecture. The colloquium takes place on the occasion of the PhD defense of Kartikeya Mishra later on that day.

Recent advances in two-dimensional and three-dimensional optofluidics show that high-quality optical imaging and beam formation is possible using fluidic components. We consider here high-contrast liquid-based tunable irises and variable slit apertures; hydraulically-actuated fluid-filled membrane lenses with aberration free tuning; and tubular fluidic systems allowing controlled variation of astigmatism. These compact, self-contained devices allow entirely new approaches for realization of high-performance imaging microsystems. ... read more

Phd defense Kartikeya Mishra

On Friday, October 28, at 16:30h the public defense of the PhD thesis of Kartikeya Mishra will take place in room 4 in the Waaibuilding. The title of Kartikeya’s thesis is “Electrically tunable optofluidic lenses: Fabrication and characterization” In his thesis he describes the physical concept, the practical development as well as the optical and numerical characterization of the devices. ... read more

MESA+ strategic research impulse project PCF Frieder Mugele, SFI Rob Lammertink and PCS Guido Mul

Fundamental aspects of photocatalysis: Photocatalysis is one of the key enabling technologies on the way towards a cleaner planet. It enables a direct conversion of energy from sunlight into chemical compounds and it allows for removing toxic organic compounds from polluted water. Despite the big potential, important microscopic aspects of the process, in particular the transfer of charge from the solid surface to the ambient fluids, are poorly understood. PCF now obtained a MESA+ strategic research impulse project together with the groups SFI (Prof. Lammertink) and PCS (Prof. Mul) to investigate these aspects using the in situ high resolution Atomic Force Microscopy that the group developed in recent years. The goal of this project is to provide a proof-of-feasibility of laterally resolved measurements of light-induced variations of the surface charge and thereby to lay the ground for more intensive follow-up research in the future. ... read more

New SKF project

A new joint project has been granted to PCF and the Surface Technology and Tribology (STT) group in collaboration with industrial partners from SKF, the Materials Innovation Institute M2i, and Tata Steel. The goal of the project is to achieve a better physical understanding of grease as a lubricant. Grease is a complex fluid that consists of a base oil embedded into a matrix of self-assembled fibrous structures that is made of amphiphilic molecules. For more details and a description of the vacancy, see here and PCF Twente on LinkedIn. ... read more