Wang K. – TechConnect Briefs

Nitrogen-modified biomass-derived porous carbon for electric double layer capacitors application

Wang K., Gu Z., Fan Q., South Dakota State University, US

This work shows that N-doped carbon can be derived from pyrrole modified biomass-lignin. Simultaneous chemical and physical activation using potassium hydroxide during the heat treatment can effectively create porous N-doped carbon. The activated carbon possesses [...]

Numerical Simulation of Electronic Properties in Quantum Dot Hheterostructures

Vlahovic B., Filikhin I., Suslov V.M., Wang K., North Carolina Central University, US

Because of the strong dependence of energy level on the geometry and sizes, the quantum dots are perfect candidates as high efficiency photovoltaic solar cells. Efficiency of 63.2% solar cell has been predicted by theoretical [...]

Numerical Simulations of Residual Stresses and Their Effects on Electronic Properties in Quantum Dots

Vlahovic B., Suslov V., Wang K., North Carolina Central University, US

A finite element method has been utilized to simulate the residual stress distributions in the quantum dots. Both lattice mismatch and thermal expansion effects are included. Our calculation indicates that the residual stresses concentrate at [...]

Residual Stress Modeling in Quantum Dots

Vlahovic B., Wang K., Suslov V., Yakovlev S.L., Otieno C., Soldi A., Dutta J., North Carolina Central University, US

One of the possible applications of the quantum dots is in a new generation of photovoltaic cells. Theory predicts the efficiency of these based solar cells to be up to 63 percent, which is substantially [...]

Residual Stress Modeling in Quantum Dots

Vlahovic B., Wang K., Suslov V., Yakovlev S.L., Otieno C., Soldi A., Dutta J., North Carolina Central University, US

One of the possible applications of the quantum dots is in a new generation of photovoltaic cells. Theory predicts the efficiency of these based solar cells to be up to 63 percent, which is substantially [...]

GEODESIC: A New and Extensible Geometry Tool and Framework with Application to MEMS

Wilson N., Wang K., Yergeau D., Dutton R.W., Stanford University, US

This paper will detail the capabilities of a new geometric modeling tool, called Geodesic, which is being released in source code form to the general community. In addition to providing geometric operations to create geometry [...]