State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Anal Chim Acta. 2012 Dec 13;757:56-62. doi: 10.1016/j.aca.2012.10.036. Epub 2012 Nov 9.
The exploitation of the unique electrical properties of nanowires requires an effective assembly of nanowires as functional materials on a signal transduction platform. This paper describes a new strategy to assemble gold-platinum alloy nanowires on microelectrode devices and demonstrates the sensing characteristics to hydrogen peroxide. The alloy nanowires have been controllably electrodeposited on microelectrodes by applying an alternating current. The composition, morphology and alloying structures of the nanowires were characterized, revealing a single-phase alloy characteristic, highly monodispersed morphology, and controllable bimetallic compositions. The alloy nanowires were shown to exhibit electrocatalytic response characteristics for the detection of hydrogen peroxide, exhibiting a high sensitivity, low detection limit, and fast response time. The nanowire's response mechanism to hydrogen peroxide is also discussed in terms of the synergistic activity of the bimetallic binding sites, which has important implications for a better design of functional nanowires as sensing materials for a wide range of applications.
纳米线独特的电学性能的开发需要将纳米线作为功能材料有效地组装在信号转导平台上。本文描述了一种在微电极器件上组装金-铂合金纳米线的新策略，并展示了对过氧化氢的传感特性。通过施加交流电，可将合金纳米线可控地电沉积在微电极上。对纳米线的组成、形态和合金结构进行了表征，结果表明纳米线具有单相合金特性、高度单分散形态和可控的双金属组成。研究表明，合金纳米线对过氧化氢的检测表现出电催化响应特性，具有高灵敏度、低检测限和快速响应时间。还根据双金属结合位点的协同活性讨论了纳米线对过氧化氢的响应机制，这对于更好地设计作为传感材料的功能纳米线以应用于广泛的领域具有重要意义。
