2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

Partnering Events:

TechConnect Summit
Clean Technology 2008

Size Tuneable Metal and Semiconductor Nanoparticles Deposited by Supercritical Fluid Carbon Dioxide for Semiconductor Device and Optics Applications

A.B. Smetana, J.S. Wang, C.M. Wai, J.J. Boeckl, G.M. Brown
University of Idaho, US

Keywords:
nanoparticle deposition, flash memory, optics

Abstract:
We have discovered that by manipulating the temperature of reverse micelle synthesis a novel route to tuning the size of nanoparticles can be achieved. By lowering the temperature of the micelle reactions, smaller particles can be reliably produced. This technique has shown size-tunablity for gold, platinum, and silver sulfide nanoparticles. Furthermore we are able to deposit these particles inside nanoscale features using supercritical carbon dioxide to precipitate the particles by an anti-solvent effect. Supercritical carbon dioxide with near zero surface tension is capable of removing the organic solvent without interrupting the self-assembling process of the nanoparticles. This leaves nanoscale trenches filled with ordered arrays of nanoparticles. The nanoparticle deposition method has the potential of producing selective islands of metal nanoparticles for flash memory device applications. The formation of uniform films of wide bandgap quantum dots through our deposition may be useful as optical filters as well as other applications.


Nanotech 2008 Conference Program Abstract