Biopolymer-manganese oxide nanoflake nanocomposite films fabricated by electrostatic layer-by-layer assembly

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• 作者：Xu Chen ; Xiong Zhang ; Wensheng Yang ; David G. Evans
• 关键词：Layer-by-layer self-assembly ; Bio-nanocomposite film ; Manganese oxide nanoflake ; Chitosan ; Electrochemical sensor
• 刊名：Materials Science and Engineering: C
• 出版年：2009
• 出版时间：1 January 2009
• 年：2009
• 卷：29
• 期：1
• 页码：284-287
• 全文大小：339 K

文摘

Bio-nanocomposite films based on chitosan and manganese oxide nanoflake have been fabricated via the layer-by-layer (LBL) self-assembly technique. UV–vis absorption spectra showed that the subsequent growth of the nanocomposite film was regular and highly reproducible from layer to layer. X-ray photoelectron spectroscopy (XPS) spectra confirmed the incorporation of chitosan and manganese oxide nanoflake into the films. Scanning electron microscopy (SEM) images revealed that the nanocomposite film had a continuous surface and a layered structure. A sensitive hydrogen peroxide (H₂O₂) amperometric sensor was fabricated with the chitosan–manganese oxide nanoflake nanocompoite film. The sensor showed a rapid and linear response to H₂O₂ over the range from 2.5 × 10^− 6 to 1.05 × 10^− 3 M, with a sensitivity of 0.038 A M^− 1 cm^− 2.