A novel biological active multilayer film based on polyoxometalate with pendant support-ligand
- Faculty of Chemistry, Northeast Normal University, Changchun 130024 (China)
A novel nanosized biological active multilayer film composed of polyoxometalate (POM) anion {alpha}-[SiW{sub 11}O{sub 39}Co(H{sub 2}PO{sub 4})]{sup 7-}(abbr. SiW{sub 11}Co-PO{sub 4}) and poly(diallyldi methylammonium chloride) (abbr. PDDA) was fabricated by layer-by-layer self-assembly (LBL). The composition and growth processes of the films have been determined by X-ray photoelectron spectra (XPS) and ultraviolet-visible absorption spectra (UV). The composite film was formed by the alternate adsorption of SiW{sub 11}Co-PO{sub 4} and PDDA, and the deposition process was quantitative and highly reproducible from layer to layer. The morphology of the film was studied by atomic force microscopy (AFM), which showed that the film was relatively uniform and smooth, and POM anions aggregated into nanoclusters distributing on the surface uniformly. The film exhibited favorable electrochemical behavior of POM indicated by cyclic voltammetry (CV). The film can immobilize the DNA molecules via Mg{sup 2+}-bridging medium.
- OSTI ID:
- 20784822
- Journal Information:
- Journal of Solid State Chemistry, Vol. 178, Issue 12; Other Information: DOI: 10.1016/j.jssc.2005.09.031; PII: S0022-4596(05)00433-0; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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