Atmospheric Microplasmas: Novel tool for Nanofabrication

Project Number
RI 7/11 RSR

Project Duration
February 2012 - January 2016

Status
Completed

Abstract
This project aims to conceptualize, develop and optimize various atmospheric microplasma systems (which represent a special class of electrical discharges formed in geometrics where at least one dimension is reduced to sub-millimeter length scales) for processing of thin films or bulk substrate surface; or for creating plasma discharges on liquid surfaces of electrolyte; or by using gas-plasma coupling at atmospheric condition to synthesize nanoparticles and nanophase structures on thin films or on bulk surface or in electrolytic solution or in gases. We Plan to use high voltage (low frequency, RF and microwave), DC and pulsed DC signals to produce various types of atmospheric pressure microplasmas. Various plasmas characteristics (such as gas temperature, electron temperature, electron densities, ionic densities) will be evaluated using existing spectroscopic diagnostic techniques and electrical probes. These microplasmas will then be coupled with liquid electrolytes or gas precursors to nucleate nanostructures in solutions or in gases, especially nanoparticles. These nanoparticles will be studied through UV-vis absorption spectrum. This will mainly be true for nanoparticles of plasmonic materials (e.g. Au, Ag and Cu etc) i.e. those materials which give a perceivable surface plasmon resonance peak. These nanoparticles/nanostructure will also be characterized for their various physical and chemical properties using XRD, SEM, XPS, TEM, etc.

Funding Source
NIE

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