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Peptide-Induced Biomineralization of Tin Oxide (SnO2) Nanoparticles for Antibacterial Applications

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Recently, there has been growing attention and effort to search for new microbicidal drugs which present different mode of action from those already existing, as an alternative to the global threat of fungal and bacterial multi drug resistance (MDR). Here we propose biological synthesis of SnO2 nanoparticles using mammalian cells as an economic and ecofriendly platform. This presents a novel biogenic method for SnO2 synthesis using metal binding peptides extracted from MCF-7 human cancer cells, which induces the biomineralization of SnO2 nanoparticles. A series of electron donor functional groups and metal binding sites in these peptides reacts with Sn2+ ions and directs the growth of SnO2 nanoparticles without addition of toxic redox and capping agents in the reaction system. Since peptides present reactive sites in aqueous solution at room temperature, a facile reaction environment can be easily achieved. Furthermore, by tuning the reactants' concentration and pH, the size, shape and 3D-structures of SnO2 nanoparticles can be controlled. Peptides also ensure biocompatibility, and SnO2 nanoparticles provide antibacterial properties, which broadens their applications in biomedical fields.
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Keywords: Biogenic; Biomineralization; Metal Binding Peptides; Microbicidal; i-TASSER

Document Type: Research Article

Affiliations: 1: Physical Intelligence Department, Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany 2: Institute for Materials Science, University of Stuttgart, Heisenbergstr. 3, 70569 Stuttgart, Germany 3: CSF Thin Films Group, Max Planck Institute for Intelligent Systems, Stuttgart 70569, Germany 4: Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Max-Dohrn-Strasse 8-10, 10589, Berlin, Germany 5: Department of Physics, Banaras Hindu University, Varanasi 05, India

Publication date: September 1, 2019

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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