Mahima S, Chaki N K, Sharma J, Kakade B A, Pasricha R, Rao A M, Vijayamohanan K
Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411008, India.
J Nanosci Nanotechnol. 2006 May;6(5):1387-91. doi: 10.1166/jnn.2006.323.
This paper reports a novel electrochemical route for anchoring monolayer protected gold nanoclusters (size 8 +/- 0.2 nm) on single-walled carbon nanotube bundles, resulting in the formation of hybrid materials. Monolayer protected gold nanoclusters prepared by modified Brust synthesis route were organized on SWNT bundles by cycling the potential in dichloromethane between -1 to +1 V at a scan rate of 50 mV/s. Monolayer protected nanoclusters in electrolyte solutions possess ionic space charge around them (double layer charging), making them suitable for organization on nanotube bundles, by tuning the electrostatic interactions. More significantly, analysis of the double layer capacitance of these hybrid materials shows almost ten times increase in capacitance compared to that of bare SWNT bundles. We believe that these hybrid materials are potentially useful in nanoelectronics.
本文报道了一种将单层保护的金纳米团簇（尺寸为8±0.2纳米）锚定在单壁碳纳米管束上的新型电化学路线，从而形成混合材料。通过改进的布斯特合成路线制备的单层保护金纳米团簇，在二氯甲烷中以50 mV/s的扫描速率在-1至+1 V之间循环电势，从而在单壁碳纳米管束上进行组装。电解质溶液中的单层保护纳米团簇周围具有离子空间电荷（双层充电），通过调节静电相互作用，使其适合在纳米管束上进行组装。更重要的是，对这些混合材料的双层电容分析表明，与裸露的单壁碳纳米管束相比，电容几乎增加了十倍。我们认为这些混合材料在纳米电子学中可能具有潜在用途。
