NanoTechnology: Materials, Processes & Devices

Many preparation methods for gold nano particle in ordered frame work or substrate have been invented to achieve high optical sensitivity and selectivity, however the complicate and long each step has leaded to low productivity and cost problem for commercialization. In this study, we report a direct synthesis of gold nano particle via meso porous silica thin film with long range orderness. In mesoporous silica thinf film, we introduced self assembly method via using tri- block copolymer. Especially, the hydrophilic part of tri-block polymer shows hydrophilic characteristics, and...

This project intends to miniaturize the conventional chemical vapor deposition (CVD) system into the micrometers range in dimension. It is believed that Micro-CVD provides better control on the gas flow, gas temperature and gas species in some aspects. This may result in the sythesis of unique nanostructures with new properties. Based on the idea, a prototype micro machined silicon structure is fabricated in the Microlab and is used to synthesize carbon nanotubes (CNTs) and graphene. The CNTs can directly be grown on varies of substrate including paper and plastic, and they are of...

The photoelectrochemical evolution of hydrogen using p-InP nanopillar arrays decorated with metallic co-catalyst is explored. The nanopillar devices exhibit an great enhancement in the conversion efficiency, as compared to planar substrates. This behavior is mainly attributed to the low surface reflectivity of nanopillar arrays along with the enhanced surface area for catalytic reactions. Of particular importance to this architecture is the use of InP as the absorber layer, which is known to have a low carrier surface recombination velocity, thereby minimizing the loss of...

Although silk is commonly known as a fiber, dissolved silk protein has recently received significant attention for its use in creating biocompatible, biodegradable, and mechanically tough materials. We have discovered that reconstituted silk fibroin (RSF) is an excellent material for molding of nano- and micro-scale patterned features. RSF alleviates several problems seen with current polymers used for micromolding (e.g. PDMS), such as device collapse and feature rounding. We have fabricated stable silk nano- and microstructures with aspect ratios of ~10 (height to diameter) where...