通过交流伏安法提高嵌入碳纳米纤维纳米电极阵列末端连接的二茂铁的电子转移速率。
Enhanced Electron Transfer Rates by AC Voltammetry for Ferrocenes Attached to the End of Embedded Carbon Nanofiber Nanoelectrode Arrays.
作者信息
Syed Lateef U, Liu Jianwei, Prior Allan M, Hua Duy H, Li Jun
机构信息
Department of Chemistry, Kansas State University, Manhattan, KS, USA.
出版信息
Electroanalysis. 2011 Jul;23(7):1709-1717. doi: 10.1002/elan.201100088. Epub 2011 May 25.
Abstract
The effect of the interior structure of carbon nanomaterials on their electrochemical properties is not well understood. We report here the electron transfer rate (ETR) of ferrocene (Fc) molecules covalently attached to the exposed end of carbon nanofibers (CNFs) in an embedded nanoelectrode array. The ETR in normal DC voltammetry was found to be limited by the conical graphitic stacking structure interior of CNFs. AC voltammetry, however, can cope with this intrinsic materials property and provide over 100 times higher ETR, likely by a new capacitive pathway. This provides a new method for high-performance electroanalysis using CNF nanoelectrodes.
摘要
碳纳米材料的内部结构对其电化学性质的影响尚未得到充分理解。我们在此报告了在嵌入式纳米电极阵列中，与碳纳米纤维（CNF）暴露端共价连接的二茂铁（Fc）分子的电子转移速率（ETR）。发现在常规直流伏安法中，ETR受CNF内部锥形石墨堆积结构的限制。然而，交流伏安法可以应对这种材料的固有特性，并通过一种新的电容途径提供高出100倍以上的ETR。这为使用CNF纳米电极进行高性能电分析提供了一种新方法。
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