National Taiwan University – Page 5

Increase the Synthesis Efficiency of Graphite Encapsulated Cobalt Nanoparticles by Annealing

Teng M.H., Lin C.C., National Taiwan University, TW

Graphite/carbon encapsulated metal (GEM) nanoparticles (Fig.1) not only provides an opportunity to study dimensionally confined systems, but also could be used in many nanotechnology applications, e.g. recording media, nano-sized wheel bearings, etc. Unlike other metal [...]

Modeling Nanosized Colloidal Particle Interactions with Brownian Dynamics Using Discrete Element Method

Li J-F, Yu W-H, Chen C-S, J. Wei W-C, National Taiwan University, TW

Discrete element method (DEM) has been developed in an integrated software system to study ceramic particle suspension and colloidal forming process recently [1, 2, 3]. Particle interactions such as van der Waals attraction, electrical double-layer [...]

Heat Transfer Macromodels for MEMS Devices with 3D Geometries

Yu C-C, Yang Y-J, National Taiwan University, TW

There are numerous heat transfer applications in MEMS, such as thermal actuating, uncooled infrared sensing, chip cooling, temperature sensing, PCR, and so on. Most of the applications need feedback loops for precise control or actuation, [...]

A Methodology of Field-Emission Modeling with Space-Charge Effects

Tsai T-H, Tang H-K, Yang Y-J, National Taiwan University, TW

In this paper, we present a methodology for modeling and simulating 3D field-emission devices (FED) with space-charge effect. This approach applies a boundary-element-method (BEM) electrostatics solver [1] and an adaptive explicit integrator. The space charge [...]

Time-Domain Reduced-Order Models of Lateral Viscous Damping Effects for 3-D Geometries

Yen P-C, Yang Y-J, National Taiwan University, TW

A methodology of generating time-domain reduced-order models of viscous lateral damping effects for microsystems is presented. A three-dimensional finite-difference-method (FDM) Stokes flow solver was developed and verified. The system matrices generate by the solver were [...]

Macromodel Extraction of Gas Damping Effects for Perforated Surfaces with Arbitrarily-Shaped Geometries

Yang Y-J, Yu C-J, National Taiwan University, TW

In this work, we present an application of an Arnoldi-based model order reduction (MOR) technique on squeezed-film damping (SQFD) effects for arbitrarily-shaped perforated geometries. The compact models generated by this approach not only can be [...]