title: Layer-by-layer self-assembly aluminum Keggin ions/Prussian blue nanoparticles ultrathin films towards multifunctional sensing applications.
abstract: In this study we described the nanocomposites films of specially synthesized inorganic Prussian blue (PB) nanoparticles and polyoxocation Al(13) 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 Al(13)/PB films as sensor devices for both the catalytic reduction of H(2)O(2) 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.
authors.affiliation: Department of Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China.
authors.forename: Geng
authors.initials: G
authors.lastname: Wang
authors.forename: Jianhua
authors.initials: J
authors.lastname: Zhou
authors.forename: Jinghong
authors.initials: J
authors.lastname: Li
mesh_terms: D017607:Aluminum Compounds / Q000737:chemistry*; D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods; D004563:Electrochemistry; D005295:Ferrocyanides / Q000737:chemistry*; D006813:Humidity; D006861:Hydrogen Peroxide / Q000032:analysis; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D009566:Nitrates / Q000737:chemistry*
chemical_list: D017607:Aluminum Compounds; D005295:Ferrocyanides; D009566:Nitrates; D006861:Hydrogen Peroxide; C050609:aluminum nitrate; C000170:ferric ferrocyanide