title: Enabling antibacterial coating via bioinspired mineralization of nanostructured ZnO on fabrics under mild conditions.
abstract: Herein, we present an environmentally benign method capable of mineralization and deposition of nanomaterials to introduce antibacterial functionalities into cotton fabrics under mild conditions. Similar to the way in which many naturally occurring biominerals evolve around the living organism under ambient conditions, this technique enables flexible substrates like the cotton fabric to be coated with inorganic-based functional materials. Specifically, our strategy involves the use of long-chain polyamines known to be responsible in certain biomineralization processes, to nucleate, organize, and deposit nanostructured ZnO on cotton bandage in an aqueous solution under mild conditions of room temperature and neutral pH. The ZnO-coated cotton bandages as characterized by SEM, confocal micro-Raman spectroscopy, XRD, UV-DRS, and fluorescence microscopy demonstrate the importance of polyamine in generating a stable and uniform coating of spindle-shaped ZnO particles on individual threads of the fabric. As the coating process requires only mild conditions, it avoids any adverse effect on the thermal and mechanical properties of the substrate. Furthermore, the ZnO particles on cotton fabric show efficient antibacterial activity against both gram-positive and gram-negetive bacteria. Therefore, the developed polyamine mediated bioinspired coating method provides not only a facile and "green" synthesis for coating on flexible substrate but also the fabrication of antibacterial enabled materials for healthcare applications.
authors.affiliation: Nanomaterials Laboratory, Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, Andhra Pradesh, India.
authors.forename: Joydeb
authors.initials: J
authors.lastname: Manna
authors.forename: Gousia
authors.initials: G
authors.lastname: Begum
authors.forename: K Pranay
authors.initials: KP
authors.lastname: Kumar
authors.forename: Sunil
authors.initials: S
authors.lastname: Misra
authors.forename: Rohit K
authors.initials: RK
authors.lastname: Rana
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D008855:Microscopy, Electron, Scanning; D008903:Minerals / Q000737:chemistry*; D049329:Nanostructures; D013784:Textiles; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; D008903:Minerals; D015034:Zinc Oxide