NL – Page 8 – TechConnect Briefs

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 [...]

Size Effects and Scaling in Misfit Dislocation Formation in Self Assembled Quantum Dots

Friedman L.H., Weygand D.M., van der Giessen E., University of Groningen, NL

Growth islands due to large mismatch strain arising in Stranski-Krastanow (SK) and Volmer-Weber (VW) ﬁlm growth can be used to produce large arrays of quantum dots. This same mismatch strain may also cause misﬁt dislocations [...]

RF Applications of MOS Model 11

van Langevelde R., Scholten A.J., Tiemeijer L.F., Havens R.J., Klaassen D.B.M., Philips Research Laboratories, NL

RF-CMOS applications impose increasingly stringent requirements on compact models used in circuit simulation. In this paper several of these issues will be addressed together with a discussion of the state-of-the-art of compact modelling.

Novel Computing Architecture on Arrays of Josephson Persistent Current Bits

Han J., Jonker P., Delft University of Technology, NL

A superconducting qubit (or quantum bit), which consists of a micrometer-sized loop with three Josephson junctions, has two persistent currents of opposite direction as its two states. The states of the qubit can be brought [...]

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 [...]

MonteCarlo Simulations of Carbon-based Structures Based on Extended Brenner Potential

Petukhov A.V., Fasolino A., Research Institute for Materials, Institute of Theoretical Physics, University of Nijmegen, NL

Extended grand-canonical off-lattice Monte Carlo simulations of the (100) and (111) diamond surfaces have shown that the Brenner potential is extremely accurate in describing the structural properties at surfaces, supporting the recent predictions of new [...]

Dynamics and Friction at Incommensurate Contacting Surfaces

Fasolino A., Consoli L., Knops H.J.F., Research Institute for Materials, Institute of Theoretical Physics, University of Nijmegen, NL

We study the mechanisms for dissipation of mechanical energy during the sliding of two bodies against each other, namely the origin of friction at an atomic scale. We consider the most likely case of incommensurate [...]

Using Scalar Algebraic Multigrid Solvers for Efficient 3-D Stress Analysis of Microfabricated Structures

Mijalkovic S., Delft University of Technology, NL

A methodology to improve the performance of iterative solvers in 3-D stress analysis using scalar algebraic multigrid (AMG) solvers has been presented. The principle idea is to split the global system of coupled stress governing [...]