SG – Page 12 – TechConnect Briefs

Physics-Based Scalable Threshold-Voltage Model for Strained-Silicon MOSFETs

Chandrasekaran K., Zhou X., Chiah S.B., Nanyang Technology University, SG

Interest in nanotechnology has grown explosively in recent years because of the potential to beneficially impact almost every aspect of our lives. In the future, we can expect technologies that exploit unique nanometer scale phenomena [...]

Threshold-Voltage-Based Regional Modeling of MOSFETs with Symmetry and Continuity

Chiah S.B., Zhou X., Chandrasekaran K., Lim K.Y., Chan L., Chandrasekaran K., Chu S., Nanyang Technology University, SG

This paper presents a unified threshold-voltage-based (Vt-based) MOSFET model, which maintains source¡Vdrain symmetry and allows accurate prediction of transconductance (gm) and drain conductance (gds) and their derivatives (gm' and gds') with smooth transitions across regions [...]

Unified Regional Approach to Consistent and Symmetric DC/AC Modeling of Deep-Submicron MOSFETs

Zhou X., Chiah S.B., Chandrasekaran K., Lim K.Y., Chan L., Chandrasekaran K., Chu S., Nanyang Technological University, SG

This paper presents our new developments of Xsim, a unified regional threshold-voltage-based model for deepsubmicron MOSFETs. New features include complete reformulation with bulk reference, including transverse electric field for effective mobility resulting in source–drain symmetry, [...]

Micromachined III-V Multimorph Actuator Model and Design using Simulated Annealing (SA)-Based Global Optimization

Ongkodjojo A., Tay F.E.H., Akkipeddi R., Institute of Materials Research & Engineering, SG

A new AlAs/GaAs-based multimorph microactuator (Fig. 1) is designed and modeled for micro-opto-electro-mechanical systems (MOEMS) applications. As the piezoelectric-based III-V materials such as AlAs/GaAs have small piezoelectric constants, we have developed the Simulated Annealing (SA)-based [...]

Analysis of AC-Driven Electroosmotic Flow in a Microchannel Packed with Microspheres

Kang Y.J., Yang C., Huang X.Y., Nanyang Technological University, SG

This paper presents a theoretical study on the AC-driven electroosmotic flow in both open and closed cylindrical microchannels packed with uniform microspheres. The time-periodic oscillating electroosmotic flow in an open microchannel in response to the [...]

Polymeric Micropump with SU-8 Check Valves Assembled by Lamination Technique

Truong T-Q, Nguyen N-T., Nanyang Technological University, SG

This paper presents the first micropumps assembled using polymeric lamination technology. Each pump consists of two 100-m-thick, 10-mm-diameter SU-8 discs; two 1.5-mm-thick, 15-mm-diameter polymethylmethacrylate (PMMA) discs; and one piezo disc. The SU-8 parts were fabricated [...]

A Low Cost Polymer Based Piezo-Actuated Micropump for Drug Delivery System

Liu H., Tay A.A.O., Wan S.Y.M., Lim G.C., Institute of Materials Research & Engineering, SG

This paper presents the design, realization and simulation of a novel polymer based check-valve micropump actuated by piezoelectric disc. Comparing with silicon substrate, polymer materials have such advantages as flexibility, chemical and biological compatibility, 3D [...]

Application of Local Radial Basis Function-based Differential Quadrature Method in Micro Flows

Xu D., Ding H., Shu C., Agency for Science Technology and Research, SG

Numerical simulation of flows in micro geometry is one of the most appealing fields in computational fluid dynamics due to the advent of MEMS. In the present study, a local Radial Basis Function-based Differential Quadrature [...]

A Disposable Glucose Biosensor Based on Diffusional Mediator Dispersed in Nanoparticulate Membrane on Screen-Printed Carbon Electrode

Gao Z., Xie F., Shariff M., Arshad M., Ying J.Y., Institute of Bioengineering and Nanotechnology, SG

In this paper, we described a disposable glucose biosensor based on co-dispersion of a diffusional polymeric mediator and glucose oxidase (GOX) in nanoparticulate membrane on screen-printed carbon electrode. The biosensor exhibited classical features of a [...]

Molecular Dynamics Simulation of Timescale Effect and Lattice Transformation of Copper Nanorod Under Bending

Wu H.A., Wang X.X., Liu G.R., National University of Singapore, SG

Mechanical behaviors of materials and structures at nanoscale are essentially different from those at macroscale, resulting from surface effect, size effect and time scale effect. In some experimental research at nanoscale, the bending displacement of [...]