Development and Evaluation of Gold 3D Cylindrical Nanoelectrode Ensembles

作     者：曹立新 闫培生 孙克宁 KIRK, W Donald 

作者机构：Department of Applied Chemistry Harbin Institute of Technology Harbin Heilongjiang 150001 China Department of Bioengineering Harbin Institute of Technology Weihai Campus Weihai Shandong 264209 China Department of Chemical Engineering and Applied Chemistry University of Toronto Toronto Ontario M5S 3E5 Canada 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：2007年第25卷第11期

页      面：1754-1757页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：the Weihai Science Research Plan 

主　　题：cylindrical nanoelectrode emsembles template synthesis chemical etching cylclic voltammetry electrochemical impedance spectroscopy 

摘      要：Gold 3D cylindrical nanoelectrode ensembles （NEEs）, 100 nm in diameter and 500 nm in length were prepared by electroless template synthesis in polycarbonate filter membranes, followed by selective controlled chemical etching. The morphology of the nanowires and cylindrical NEEs was imaged by scanning electron microscopy. The protruding nanoelectrodes were in good parallel order. EDX study showed that the nanoelectrode elements consisted of pure gold. The electrochemical evaluation of the 3D electrodes was conducted using the well known [Fe（CN）6]^3-/[Fe（CN）6]^4- couple. Cyclic voltammgrams （CV） show a very low double layer charging current and a higher ratio of signal to background current than 2D disc NEEs. Electrochemical impedance spectroscopy （EIS） indicates that the 3D cylindrical NEEs effectively accelerate the charge transfer process, which is in consistent with the results of CV. The linear relationship with a slope of 0.5 between lg Ipc and lg v shows that linear diffusion is dominant on the 3D cylindrical NEEs at conventional scan rates.