Synthesis of Surfactant-free Aligned Single Crystal Copper Nanowires by Thermal-Assisted Photoreduction

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• 作者：Hsien-Tse Tung ; Jenn-Ming Song ; Teng-Yuan Dong ; Weng-Sing Hwang ; In-Gann Chen
• 刊名：Crystal Growth & Design
• 出版年：2008
• 出版时间：September 3, 2008
• 年：2008
• 卷：8
• 期：9
• 页码：3415-3419
• 全文大小：370K
• 年卷期：v.8,no.9(September 3, 2008)
• ISSN：1528-7505

文摘

A surfactant-free, template-less, and seed-less method for synthesis of aligned copper nanolawns has been demonstrated. Ultralong copper nanowires (50−200 nm in diameter, about 200 μm in length; aspect ratio > 1000) can be obtained through the combination of photoreduction of metallic ions (e.g., aqueous cupric chloride solution) on the surface of thin film titanium dioxide and blackbody radiation at 500 °C. The Cu nanowires (NWs) thus produced are single crystalline with a preferred [100] growth direction. The electrical behavior investigated using a nanomanipulation device indicates that the Cu NWs possess an excellent electrical resistivity of 18.57 μΩ-cm, which is the lowest value reported so far. It is also demonstrated that this thermal-assisted photoreduction (TAP) process is a novel method capable of synthesizing various one-dimensional metallic NWs, such as Cu, Ag, and Au, in large quantities.