University of TWente – TechConnect Briefs

Polymeric Hybrid Microstructures for Smart Targeting and Drug Delivery

Dudia A., Kanger J.S., Subramaniam V., University of TWente, NL

Artificial cells (AC) refer to (sub) micro-vehicles that can perform a specific bio-function in the body, without being rejected from the immune system. Such smart targeting and drug delivery systems are aimed for use in [...]

FEM Assisted Design of Novel Electrothermal Actuators

Deladi S., Krijnen G., Elwenspoek M., University of TWente, NL

The demand for powerful actuators, which can be embedded into MEMS devices draws attention to electrothermal actuators, although there can be drawbacks such as the heat created during actuation. The main advantage is the low [...]

Low Volume, Large Force (>1mN) and Nanometer Resolution Electrostatic Microactuator for Low Displacement Applications

Sarajlic E., Berenschot E., Krijnen G., Elwenspoek M., University of TWente, NL

An electrostatic microactuator suitable for low displacement applications is successfully fabricated and tested. A large force (>1mN) with a controllable nanometer resolution step (

Three Dimensional Adhesion Model for Arbitrary Rough Surfaces

Deladi S., Krijnen G., Tas N.R., Elwenspoek M.C., University of TWente, NL

We present a 3D adhesion model based on the JKR theory applied locally for all contacting asperity couple and the calculations account the van der Waals interaction beside the externally applied force. Thus, equilibrium of [...]

Scaling Behavior of Pressure-Driven Micro-Hydraulic Systems

Tas N.R., Lammerink T.S.J., Berenschot J.W., Elwenspoek M.C., van den Berg A., University of TWente, NL

This paper presents a lumped network approach for the modelling and design of micro-hydraulic systems. A hydraulic oscillator has been built consisting of hydraulic resistors, capacitors and transistors (pressure controlled valves). The scaling of micro-hydraulic [...]

Simulation of Electro-Osmotically Driven Microsythesis Systems

Oosterbroek R.E., Goedbloed M., van den Berg A., University of TWente, NL

Modeling, optimization, and the realization of an electroosmotically driven chemical microsynthesis system for Wittig reactions are presented. Essential for good functioning of the chemical liquid reaction system is controllability of the supplied chemicals, independently of [...]

Modeling and Validation of Flow-Structure Interactions in Passive Micro Valves

Oosterbroek R.E., Schlautmann S., Berenschot J.W., Lammerink T.S.J., van den Berg A., Elwenspoek M.C., University of TWente, NL

This paper reports the modeling of the stationary flow-structure interaction of different types of micro check valves. Mathematical indirect, domain coupled and decoupled, finite element models as well as analytical approximations are made. The obtained [...]