Chen Y. – Page 3 – TechConnect Briefs

Adsorption/Desorption of Cd by Titanium Dioxide Nanoparticles and Sediment Particles as well as Their Facilitated Bioaccumulation of Cd into Carp

Zhang X., Chen Y., Sun H., Crittenden J.C., Arizona State University, US

There are increasing concerns about the health and environmental impact of nanomaterials. The study of Sun et. al 2006 provided the evidence of facilitated bioaccumulation of As(V) in carp in the presence of titanium dioxide [...]

High Capacity Nano-optical Diffraction Bar-code Tagging for Biological and Chemical Applications

Banu S., Birtwell S., Chen Y., Galitonov G., Morgan H., Zheludev N., University of Southampton, UK

Here we describe a new method for encoding small beads which allows for non-contact reading. The tagging technique is based on fabricating a nano-structured pattern on the surface of the particle, which is only a [...]

Templated Growth of Single Walled Carbon Nanotubes by CO Disproportionation on Cobalt Incorporated MCM-41

Ciuparu D., Lim S., Chen Y., Dobek F., Harding D., Haller G., Pfefferle L., Yale University, US

Single-walled carbon naotubes of uniform size were produced inside the pore system of cobalt substituted MCM41 mesoporous molecular sieve. Proof of concept has been achieved and preliminary results are reported.

Analysis of Phonon Dispersion Relations from Atom Model to Continuum Theory

Chen Y., Lee J.D., The George Washington University, US

The phonon dispersion relations calculated by atomic model: shell model and ab initio, and by microcontinuum theory are introduced in this paper. It is found that both atomic models and microcontinuum theory can describe the [...]

Analysis of Phonon Dispersion Relations From Atomic Model to Continuum Theory

Chen Y., Lee J.D., The George Washington University, US

The phonon dispersion relations calculated by atomic model: shell model and ab initio, and by microcontinuum theory are introduced in this paper. It is found that both atomic models and microcontinuum theory can describe the [...]

Numerical Simulation of Droplet Shapes on Rough Surfaces

Patankar N.A., Chen Y., Northwestern University, US

It has been demonstrated that surface roughness causes superhydrophobicity. Our objective is to develop a numerical tool and study the relationship between the roughness characteristics and the apparent contact angle and motion of liquid drops [...]

A Comparative Study of Double-Gate and Surrounding-Gate MOSFETs in Strong Inversion and Accumulation Using an Analytical Model

Chen Y., Luo J., University of California-Berkeley, US

An analytical model for the electric characteristics of ultrathin double-gate and surrounding-gate MOSFETs in strong inversion and accumulation is presented. The analytical solutions to the 1-D simplified Poisson's equation in both Cartesian and cylindrical coordinates [...]

Modeling and Control of Nanomirrors for EUV Maskless Lithography

Chen Y., Shroff Y., Oldham W.G., University of California, US

The design of mirrors for use in EUV maskless lithography is presented in this paper. We propose a novel nanomirror system with a linear comb actuator, which has favorable stability and performance. A bias voltage [...]

A Quadratic Method for Nonlinear Model Order Reduction

Chen Y., White J.K., Massachusetts Institute of Technology, US

In order to simulate and optimize effciently systems which include micromachined devices, designers need dynamically accurate macromodels for the those devices. Although it is possible to develop such macromodels by hand, it would be vastly [...]

Phase-Lead Compensator to Improve the Transient Performance of Comb Actuators

Chen Y., Shroff Y., Oldham W.G., University of California, US

The transient performance of electrostatic actuators is important in high-frequency switching operation of MEMS devices [1]. Optimization of the transient behavior of a simple actuator without introduction of controller network or modification of actuator shape [...]