hydrogen – Page 7 – TechConnect Briefs

Nanomaterials for Desulfurization & Hydrogen Generation

Venugopal G., Vylkov N., Unfried K., Sapp M., Hunt A., nGimat Co., US

Energy R&D is being driven by concerns about global warming and air pollution largely attributed to pollutants from the burning of fossil fuels. While long-term energy strategies may call for the complete replacement of petroleum-based [...]

Studies of Hybrid Nano-Bio-System: Single-Walled Carbon Nanotubes and Hydrogenase

Svedruzic D., Blackburn J.L., McDonald T.J., Heben M.J., King P.W., National Renewable Energy Laboratory, US

We have examined changes in single-walled carbon nanotubes (SWNT) optical signals upon addition of recombinant [FeFe] hydrogenases from Clostridium acetobutylicum or Chlamydomonas reinhardtii. We found evidence that novel and stable charge-transfer complexes are formed only [...]

From nanopores to nanoshells: The transformation of MCM-41 into ultrathin wall, hollow silica nanospheres

Ho W.Y., Yeung K.L., Hong Kong University of Science and Technology, HK

This work describes the preparation of ultra-small and ultra-thin hollow silica nanospheres from mesoporous MCM-41. The partially converted MCM-41, which retained the silhouette of the original MCM-41 particle, but is severely riddled with holes from [...]

Gated Carbon Nanotube Field Emission Enhancement and Regeneration by Hydrogen

Hsu D.S.Y., Shaw J.L., Naval Research Laboratory, US

We have previously demonstrated two different configurations of integrally gated carbon nanotube field emitter arrays (FEAs). CNTs were grown inside microfabricated gate apertures with and without silicon posts. Salient features of these in-situ grown microgated [...]

Effect of Palladium Size on its Chemical Activity

Huang C-D., Huang S.Y., Huang C-D., Huang S.Y., Chang B-T., Yeh C.T., National Tsing Hua University, TW

Palladium crystallites with size down to d < 1 nm or were successfully dispersed on silica support and characterized with TEM. A process of hydrogen absorption into the dispersed crystallites were studied by a simultaneous [...]

Process for Extremely Thin Silicon-on-Insulator Wafer

Usenko A.Y., Carr W.N., Chen B., Silicon Wafer Technologies, Inc., US

We observe hydrogen platelets buildup into single crystalline silicon caused by hydrogen plasma processing. The platelets are aligned along a layer of lattice defects formed in silicon before plasma processing. The buried defect layer is [...]