Publications by authors named "Ha Minh Tan"
Article Synopsis
- * Results showed that double-layer GaO layers provide better thickness uniformity, surface smoothness, and crystal quality than single-layer ones, with the upper layer's carrier concentration affected by mist flow velocity.
- * The research indicates that the electrical properties vary between single and double-layer structures, with double layers showing promise for high-power electronic applications due to their enhanced carrier mobility.
Article Synopsis
- * This study explores how external magnetic fields from Helmholtz coils can impact fluid flow in a silicon melt during crystal growth.
- * A specific setup with a vertical downward magnetic field was found to improve both the growth rate and uniformity of SiC crystals by influencing the carbon flux to the crystal surface.
In this study, multiphysics simulations were carried out to understand the convection mechanisms of the top seeded solution growth (TSSG) of SiC. Experimental melting tests and crystal growth were conducted to verify the simulation results in the growing temperatures between 1700 and 1900 °C with rf induction heating furnace. From the solidified melt of Si-Cr solution after the melting test, the melt flow in the simulation was successfully verified.
View Article and Find Full Text PDFNovel Self-Heated Gas Sensors Using on-Chip Networked Nanowires with Ultralow Power Consumption.
ACS Appl Mater Interfaces
February 2017
The length of single crystalline nanowires (NWs) offers a perfect pathway for electron transfer, while the small diameter of the NWs hampers thermal losses to tje environment, substrate, and metal electrodes. Therefore, Joule self-heating effect is nearly ideal for operating NW gas sensors at ultralow power consumption, without additional heaters. The realization of the self-heated NW sensors using the "pick and place" approach is complex, hardly reproducible, low yield, and not applicable for mass production.
View Article and Find Full Text PDF