Layer-by-layer self-assembly aluminum Keggin ions/Prussian blue nanoparticles ultrathin films towards multifunctional sensing applications |
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Authors: | Wang Geng Zhou Jianhua Li Jinghong |
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Affiliation: | aDepartment of Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China |
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Abstract: | In this study we described the nanocomposites films of specially synthesized inorganic Prussian blue (PB) nanoparticles and polyoxocation Al13 Keggin ions that possess the excellent sensing activities. Film fabrication using layer-by-layer (LBL) self-assembly technique was followed by electrochemical characterization. The assembled multilayer Al13/PB films as sensor devices for both the catalytic reduction of H2O2 and detecting the change of relative humidity were also investigated. The sensitivity of the biosensor was 0.886 mA cm−2 mM−1, and about two orders of magnitude change in resistance was observed as the relative humidity increasing from 5 to 95%. Both sensors exhibited good reproducibility, wide linear range. The performance and multifunctional abilities of these nanocomposites promise potential applications in biosensors, environmental controlling system and biomedical devices. |
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Keywords: | Prussian blue Polyoxocation Layer-by-layer Electrochemistry Hydrogen peroxide Humidity sensor |
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