US – Page 256 – TechConnect Briefs

Density Gradient Quantum Surface Potential

Morris H., Cumberbatch E., Yong D., Abebe H., Tyree V., Claremont Graduate University, US

The PSP model, a generalized Surface-Potential (SP) model, has been chosen to be an industry standard for the next generation, 60nm, technology. A major drawback of such SP-models is that the surface potential is given [...]

Probabilistic Models for Damage and Self-repair in DNA Self-Assembly

Majumder U., Duke University, US

DNA self-assembly is the autonomous phenomenon where components (single strands or structures made of DNA single strands organize themselves into stable superstructures. Since its inception the focus of DNA self-assembly based nanostructures has mostly been [...]

Monte Carlo simulations of 1keV to 100keV electron trajectories from vacuum through solids into air and resulting current density and energy profiles

Hieke A., GEMIO Technologies, Inc., US

Increased awareness to use environmentally friendly methods for surface sterilization has rejuvenated interest in methods based on electron beam irradiation. Thus far, Monte Carlo electron beam simulations have been described either as typical electron optics [...]

Assembly of Nanoscale Scaffolds from Peptide Nucleic Acids (PNA)

Husk Jr. T., Bergstrom D.E., Purdue University, US

Deoxyribonucleic acid or DNA has been demonstrated to be a useful scaffold for self-assembling nanomaterials. Peptide nucleic acids, or PNA, which retains the nucleic acid bases adenine, cytosine, guanine, and thymine on a pseudo-peptide backbone [...]

Numerical Simulation of Polymer Phase Separation on a Patterned Substrate with Nano Features

Shang Y., Wei M., Kazmer D., Mead J., Barry C., University of Massachusetts-Lowell, US

Phase separation of an asymmetric immiscible binary polymer system in an elastic field with the existence of a heterogeneously functionalized substrate surface was numerically studied in 2D and 3D. An unconditionally stable method for time [...]

Computational Modeling of Ligands for Water Purification Nanocoatings

Vanka K., Houndonougbo Y., Lien N.R., Harris J.M., Farmen L.M., Johnson D.W., Laird B.B., Thompson W.H., University of Kansas, US

Electronic structure and molecular dynamics calculations are being used to investigate ligand-based nanocoatings for use in drinking water purification applications. The aim is to use computational chemistry to aid in the development of design principles [...]

Molecular Dynamics Simulation of Bulk Silicon under Strain

Zhao H., Aluru N.R., University of Illinois at Urbana-Champaign, US

In this paper, thermodynamical properties such as Helmholtz free energy and internal energy when the silicon crystal is subjected to a compression, stretch and a shear deformation are calculated using classical MD open source code [...]

Simulation of Constant-Charge Biasing Integrated Circuit for High Reliability Capacitive RF MEMS Switch

Choi K.H., Lee J.B., Goldsmith C.L., The University of Texas at Dallas, US

This paper provides simulation results for a constant-charge biasing IC for capacitive RF MEMS switches to drastically improve reliability. It is well known that there are some forefront issues for RF MEMS switches to be [...]

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Doody C.B., Wadhwa J.S., Lemmerhirt D.F., White R.D., Tufts University, US

The goal of this project was the experimental characterization and modeling of capacitive micromachined ultrasound transducers (cMUTs). The cMUTs being tested are fabricated using layers common to standard commercial CMOS processes. Two designs of micromachined [...]

Design and Simulations of a Microfluidic Pump with Multiple Vibrating Membranes

Koombua K., Pidaparti R.M., Longest P.W., Atkinson G.M., Virginia Commonwealth University, US

A novel design of a micropump with multiple vibrating membranes has been developed in this study. The micropump consists of three nozzle/diffuser elements with vibrating membranes, which are used to create pressure difference in the [...]