Encoding Morphology in Oxide Nanostructures during Their Growth

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• 作者：Yigal Lilach ; Jin-Ping Zhang ; Martin Moskovits ; and Andrei Kolmakov
• 刊名：Nano Letters
• 出版年：2005
• 出版时间：October 2005
• 年：2005
• 卷：5
• 期：10
• 页码：2019 - 2022
• 全文大小：417K
• 年卷期：v.5,no.10(October 2005)
• ISSN：1530-6992

文摘

Programmable control over the overall structure of SnO₂ nanowires grown by vapor-solid synthesis is shown to be possible by pulse modulatingthe flow rate of the carrier gas in which oxygen (one of the reactants) is entrained. The control is shown to depend on the local oscillationof 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 forproducing predictable morphological and compositional variations in 1D nanostructures, thereby potentially resulting in a high yield of custom-designed nanostructures.