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

✍ Scribed by Xu Chen; Xiong Zhang; Wensheng Yang; David G. Evans

• Book ID: 103847401
• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 339 KB
• Volume: 29
• Category: Article
• ISSN: 0928-4931
• DOI: 10.1016/j.msec.2008.06.024

✦ Synopsis

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 (H 2 O 2 ) amperometric sensor was fabricated with the chitosan-manganese oxide nanoflake nanocompoite film. The sensor showed a rapid and linear response to H 2 O 2 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 .