Effect of Poly(amine)s on the Redox Properties of Carboxymethylcellulose and Ferrocene‐modified Poly(amine) Layer‐by‐Layer Films |
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Authors: | Yu Aikawa Takumi Watanabe Daichi Minaki Shigehiro Takahashi Baozhen Wang Jun‐ichi Anzai |
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Institution: | 1. Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba‐ku, Sendai 980‐8578, Japan;2. Department of Nutrition and Food Hygiene, School of Public Health, Shandong University, 44 Wenhuaxi Road, Jinan 250012, Shandong, China |
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Abstract: | Multilayer films consisting of carboxymethylcellulose (CMC) and ferrocene‐modified poly(ethyleneimine) (Fc‐PEI) or poly(allylamine hydrochloride) (Fc‐PAH) were successfully prepared on a gold electrode to examine their redox properties. The redox current of (Fc‐PEI/CMC)n film‐coated electrodes increased with the number of layers, while the (Fc‐PAH/CMC)n film‐coated electrodes exhibited increased response only for the first eight bilayers. The (Fc‐PEI/CMC)n and (Fc‐PAH/CMC)n films deposited on the surface of Fc‐free multilayer film‐coated electrodes also showed a redox response. The (PEI/CMC)5 film‐coated electrode showed redox responses in Fc‐PEI and Fc‐PAH solutions, confirming the uptake of the Fc‐polymers in the inner film. In contrast, the uptake of the Fc‐polymers in the (PAH/CMC)5 film was severely suppressed, suggesting that different permeability of (PEI/CMC)5 and (PAH/CMC)5 films. |
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Keywords: | Layer‐by‐layer film Ferrocene‐modified electrode Cyclic voltammetry Thin film |
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