US – Page 411 – TechConnect Briefs

Electric Field Induced Self Assembly of Polymer Structures

Yang M., Ozkan C.S., Gao H., University of California Riverside, US

We have developed a method for fabricating polymer microstructures based on electric field induced self assembly and pattern formation. A dielectric fluid placed in between to conductive plates experiences a force in an applied electric [...]

A Fully Coulpled Computational Model of the Silylation Process

Winters W.S., Evans G.H., Prantil V.C., Larson R.S., Sandia National Laboratories, US

This paper describes a fully coupled computational model of the positive tone silylation process. The model is two-dimensional and transient and focuses on the part of the lithography process in which crosslinked and uncrosslinked resist [...]

Study of Misaligned Lateral Combdrive Static Actuators

Avdeev I., Lovell M., Onipede Jr. D., University of Pittsburgh, US

In-plane combdrive misalignments are studied using developed analytical and numerical (FEA) models and techniques. Issues of decreasing precision and stability are discussed. The analytical models are closed form and can be used by designers of [...]

A Multiscale Meshfree Method for the Mechanical Analysis of Low Dimensional Nanostructures

Qian D., Liu W.K., University of Cincinnati, US

A new multiscale meshfree approach for the mechanical analysis of low dimensional nanostructures is proposed, with the objective that both computational efficiency and accuracy can be achieved for systems involving large number of atoms or [...]

Calculation of Shock Waves and Temperatures of FCC Single Crystals (Nickel) using Large-Scale Molecular Dynamics

Kum O., Clemson University, US

Multimillion-atom molecular dynamics simulations using double-SPMD (SPSPMD) have been applied to calculate fcc single crystal, Nickel, shock wave and temperature profiles on a CrayT3E. Three well known model potentials, analytical EAM, Morse type simple pair, [...]

Converging Technologies (NBIC)

Bainbridge W.S., National Science Foundation, US

The convergence of nanotechnology, biotechnology, information technology and cognitive science can greatly improve human performance over the next ten to twenty years. The chief areas of application include: expanding human cognition and communication, improving human [...]

Coarse-Grained Molecular Dynamics for Nano-Design

Rudd R.E., Lawrence Livermore National Laboratory, US

The design of nanoscale mechanical systems poses a novel set of challenges for modeling and simulation. The need for an accurate model of the nanoscale components is clear. This can be of the form of [...]

A Numerical Model of Viscoelastic Flows in Microchannels

Trebotich D., Colella P., Miller G., Liepmann D., Lawrence Livermore National Laboratory, US

We present a numerical method to model non-Newtonian, viscoelastic flow at the microscale. The equations of motion are the incompressible Navier-Stokes equations coupled with the Oldroyd-B constitutive equation. This constitutive equation is chosen to model [...]

Evolving Molecular Force Field Parameters for Si and Ge

Globus A., Ricks E., Menon M., Srivastava D., CSC at NASA Ames, US

A genetic algorithm (GA) has been developed to fit parameters for multi-species reactive inter-atomic force field functions. While GA has successfully parameterized force fields in the past [Hunger, Beyreuther, Huttner, Allinger, Radelof, Zsolnai (1998), Hunger, [...]

Nonlinear Dynamical Aspects of Atomic Scale Friction

Conley W.G., Raman A., Krousgrill C.M., Purdue Univerrsity, US

This work presents a detailed computational and analytical investigation of Tomlinsons model for atomic scale dry friction [1]. The model (Figure 1) describes a prototypical mechanism of energy dissipation from an atom dragged across a [...]