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- W2040248873 abstract "The current understanding of the molecular mechanisms involved in the bioinspired formation of silica structures laid foundation for investigating the potential of the S-layer protein SbpA from Lysinibacillus sphaericus CCM 2177 as catalyst, template and scaffold for the generation of novel silica architectures. SbpA reassembles into monomolecular lattices with square (p4) lattice symmetry and a lattice constant of 13.1 nm. Silica layers on the S-layer lattice were formed using tetramethoxysilane (TMOS) and visualized by transmission electron microscopy. In situ quartz crystal microbalance with dissipation monitoring (QCM-D) measurements showed the adsorption of silica in dependence on the presence of phosphate in the silicate solution and on the preceding chemical modification of the S-layer. An increased amount of precipitated silica could be observed when K2HPO4/KH2PO4 was present in the solution (pH 7.2). Further on, independent of the presence of phosphate the silica deposition was higher on S-layer lattices upon activation of their carboxyl groups with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC) compared to native S-layers or EDC treated S-layers when the activated carboxyl groups were blocked with ethylene diamine (EDA). Fourier transform infrared attenuated total reflectance (FTIR-ATR) spectroscopy revealed the formation of an amorphous silica gel (SiO2)x·yH2O on the S-layer. The silica surface concentrations on the S-layer was 4 × 10−9 to 2 × 10−8 mol cm−2 depending on the modification of the protein layer and corresponded to 4–21 monolayers of SiO2." @default.
- W2040248873 created "2016-06-24" @default.
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- W2040248873 date "2010-02-01" @default.
- W2040248873 modified "2023-10-01" @default.
- W2040248873 title "S-layer templated bioinspired synthesis of silica" @default.
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- W2040248873 doi "https://doi.org/10.1016/j.colsurfb.2009.09.037" @default.
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