Self-Assembled Shape- and Orientation-Controlled Synthesis of Nanoscale Cu3Si Triangles, Squares, and Wires

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• 作者：Zhou Zhang ; Lai Mun Wong ; Hock Guan Ong ; Xin Jiao Wang ; Jun Ling Wang ; Shi Jie Wang ; Hongyu Chen ; Tom Wu
• 刊名：Nano Letters
• 出版年：2008
• 出版时间：October 8, 2008
• 年：2008
• 卷：8
• 期：10
• 页码：3205-3210
• 全文大小：324K
• 年卷期：v.8,no.10(October 8, 2008)
• ISSN：1530-6992

文摘

Controlling shape and orientation is important for the synthesis of functional nanomaterials. In this work, nanoscale Cu₃Si triangles, squares, and wires have been grown on Si(111), (100), and (110) substrates, respectively, through a template-free Au-nanoparticle-assisted vapor transport method. The sides of nanotriangles and nanosquares and the growth direction of the nanowires are all along Si ⟨110⟩, giving rise to long-range ordering of the nanostructures. Au nanoparticles absorb Cu vapor and facilitate the rate-limited diffusion of Si, which is critical for the shape-controlled growth of Cu₃Si. This bottom-up approach to synthesize shape- and orientation-controlled Cu₃Si nanostructures might be applicable to the tailored growth of other materials.