Seed-Mediated Growth Method for Epitaxial Array of CuO Nanowires on Surface of Cu Nanostructures and Its Application as a Glucose Sensor

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• 作者：Xiaojun Zhang ; Guangfeng Wang ; Wei Zhang ; Nianjun Hu ; Huaqiang Wu ; Bin Fang
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：June 19, 2008
• 年：2008
• 卷：112
• 期：24
• 页码：8856 - 8862
• 全文大小：2165K
• 年卷期：v.112,no.24(June 19, 2008)
• ISSN：1932-7455

文摘

The preparation and characterization of a large-scale epitaxial array of single-crystalline CuO nanowires (NWs) on the surface of a Cu nanostructure (Cu−CuO nanocomposite) by a simple liquid−solid growth process at room temperature is demonstrated. The field-emission scanning electron microscopy image analysis indicated that the NWs are 50−80 nm wide at the root and 300−400 nm long. The high-resolution transmission electron microscopy study on individual CuO NWs revealed that the NWs are single crystalline with a growth orientation of [110]. X-ray powder diffraction and energy dispersive X-ray analysis of the samples revealed that the CuO NWs only cover the surface of dendritic Cu and that Cu dendrites still exist in the center of the Cu−CuO nanocomposite. Electrochemical impendance spectroscopy and cyclic voltammetry showed that the Cu−CuO nanocomposite has a stronger ability to promote electron transfer than the CuO NWs or CuO nanoparticles individually. The Cu−CuO nanocomposite was successfully used to modify a glassy carbon electrode to detect H₂O₂ and glucose with chronoamperometry. The result shows that the Cu−CuO nanocomposite may be of great potential as H₂O₂ and glucose electrochemical sensors.