AAAR 31st Annual Conference
October 8-12, 2012
Hyatt Regency Minneapolis
Minneapolis, Minnesota, USA
Abstract View
Combustion-Driven One Step Synthesis of Non-Oxide Nanoparticle Hybrid Films in a High Temperature Reducing Jet Reactor
Munish Sharma, Raymond Buchner, William Scharmach, Vasilis Papavassiliou, MARK SWIHART, University at Buffalo (SUNY)
Abstract Number: 562 Working Group: Synthesis of Functional Materials using Flames, Plasmas and other Aerosol Methods
Abstract We present here the high temperature flame-based synthesis of non-oxide nanoparticle hybrid films using a high temperature reducing jet (HTRJ) reactor. We synthesized bimetallic copper-silver, palladium-copper, palladium-silver and ternary palladium-copper-silver nanoparticles and created nanostructured films by direct deposition of nanoparticles produced within the HTRJ reactor. The HTRJ process allows us to decouple the flame chemistry from the nanoparticle formation chemistry. The alloy and bi-component nanoparticles have potential applications in conductive ink formulations for printed electronics, in antibacterial coatings, and in heat-transfer fluids. The palladium-based alloy films have applications in hydrogen storage and purification. Alloying palladium with copper and/or silver prevents hydrogen embrittlement and results in higher hydrogen permeation fluxes. We synthesized these hybrid films in one step by thermal decomposition of low-cost, water-soluble, and environmentally-friendly precursors. The metal films were thermophoretically deposited on soda lime glass and on SS-316 porous discs. In this presentation, we will describe the HTRJ process briefly, and then focus on the synthesis and characterization of bimetallic copper-silver films on glass substrates. The hybrid copper-silver coating yielded in very high bulk electrical conductivity of 10$^4 S/m at 40 wt% Ag. The effect of silver concentration in the mixed copper-silver films on the electrical conductivity of these coatings was studied systematically. We will also present synthesis and characterization of palladium-based alloy membranes on porous SS-316 discs for hydrogen storage and transport.