Thermo-Electro-Mechanics at Individual Particles in Complex Colloidal Systems

Colloidal particles at liquid interfaces.

Determination of the effective charge of individual colloidal particles.

An optical method is presented that allows simultaneous determination of the diffusion constant and electrophoretic mobility of individual charged particles with radius down to 0.2 mum. By this method the size dependency of the effective charges and zeta potentials of individual particles can be investigated, as well as interparticle interactions and Brownian motion in confined geometries. The ...

Continuum Thermo-Mechanics Fundamentals

We assume that at the continuum scales of interest here, the mass density ⇢ as well as the the momentum per unit volume ⇢u can be interpreted as well-defined averages of microscopic masses and momenta. That is, they are averages over minute spatial regions and time intervals, which can nevertheless be chosen large enough that there are negligible statistical fluctuations about those averages at...

Modeling Thermo-electro-mechanical Beams in Sugar

INTRODUCTION Qconv SUGAR is a simulation package for 3D MEMS devices that utilizes nodal analysis techniques [1]. It has been shown that nodal analysis is significantly faster than other simulation techniques and can be just as accurate. The latest version of SUGAR (v2.0) includes various models for 2D and 3D beams, electrical beams, and gap closing actuators [2]. In addition, SUGAR is easily e...

Cardiac electro-mechanics in numerico

Pacing leads, attached to the heart wall, continuously move and deform during the cardiac cycle. Knowledge about deformation is needed for optimal lead design and pacing site. The overall aim of the study is to quantify motion and deformation of lead and wall, using a finite element model of the beating heart. In this study the relation between electrical activation (moment of depolarization) a...