کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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221062 | 463368 | 2007 | 9 صفحه PDF | دانلود رایگان |

The electrostatic layer-by-layer assembly method was successfully used in a multilayer buildup of polyaniline (PANI) and platinum nanocrystals encapsulated in the carboxyl-terminated poly(amidoamine) dendrimers (generation 4.5 G4.5COOH) (Pt-G4.5COOH NPs) on solid substrates. Multilayer growth was monitored by ultraviolet–visible (UV–vis) absorption spectroscopy. The AFM observation revealed a molecularly smooth (PANI/Pt-G4.5COOH NPs)m multilayer film which is rougher and thicker than the multilayer of PANI and G4.5COOH (G4.5COOH/PANI)m. The PANI/Pt-G4.5COOH NPs multilayers show a fast surface-confined electron-exchange process at the Au electrode in an acid solution, and remains stable, reversible and electroactive, even in neutral solution. Furthermore, the multilayers show a strong electrocatalytic response towards CO oxidation and O2 reduction, and the catalytic capability can be easily tuned by the control of multilayer thickness.
Journal: Journal of Electroanalytical Chemistry - Volume 599, Issue 1, 1 January 2007, Pages 127–135