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Nanocrystalline zinc oxide (nc-ZnO) thin films with c-axis orientation were synthesized by plasma assisted pulsed laser deposition from metallic zinc. Structural characterization and annealing effects were investigated by means of X-ray diffraction, Raman scattering and Fourier transform infrared spectroscopy. The synthesized nc-ZnO films have a wurtzite structure and high crystallographic orientation...
We present the microfabrication and initial testing of an AFM-tip like device, or nanotorch, that is capable of generating a very localized microplasma at its tip. The submicron region near its tip provides a unique manufacturing environment where new methods for controlled direct-write micro and nanofabrication can be tested. The device has been fabricated using both surface and bulk micromaching...
Large-area GaAs nanowires are fabricated by using SiO2 nanoparticles as a mask. SiO2 nanoparticle monolayer is spin-coated on the GaAs substrate and GaAs nanowires are etched by induced-coupled plasma reactive ion etcher.
In this work, a directed assembly technique for controlled micro-patterning of single-walled carbon nanotubes (SWNTs) on to a flexible parylene-C substrate has been demonstrated. A simple site-selective fluidic assembly of SWNTs has been utilized to directly assemble SWNTs on a plasma treated parylene-C substrate to form ordered high density carbon nanotube networks. Continuous nanotube micro-arrays...
Assembly of colloidal arrays has attracted much attention over the past decade. Surface property and topology play important roles in the assembly of colloidal patterns and layers on various substrates. In this paper, we report on a novel micropattern-assisted nanoassembly (muPAN) method to organize highly ordered nanocolloidal arrays onto a nonfouling polymer surface. Polyethylene glycol (PEG) hydrogel...
Highly ordered porous anodic alumina (HOPAA) is directly fabricated on the various substrates over large areas (> 1.5 cm2) by using a "soft-imprinting" method. In this process, we employ Ar plasma etching to "soft imprint" an evaporated Al film through a free-standing HOPAA mask. The nanoindentation arrays replicated from the mask and created on the Al surface by soft imprinting...
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