Web Release Date: September 17,
Encoding Morphology in Oxide Nanostructures during Their Growth
and
Department of Chemistry & Biochemistry and Department of Materials, University of California, Santa Barbara, California 93106, and Physics Department, SIUC, Carbondale, Illinois 62901
Received August 5, 2005
Revised September 4, 2005
Abstract:
Programmable control over the overall structure of SnO2 nanowires grown by vapor-solid synthesis is shown to be possible by pulse modulating the flow rate of the carrier gas in which oxygen (one of the reactants) is entrained. The control is shown to depend on the local oscillation of the supersaturation condition for the SnO vapor (another reactant) in the vicinity of the growing nanostructure. The latter triggers dramatic, reproducible oscillations in the lateral dimensions of the nanostructure and in the direction of its growth. The method provides a means for producing predictable morphological and compositional variations in 1D nanostructures, thereby potentially resulting in a high yield of custom-designed nanostructures.
Download the full text: PDF | HTML
