title: Green synthesis of highly concentrated aqueous colloidal solutions of large starch-stabilised silver nanoplatelets.
abstract: A simple, environmentally friendly and cost-effective method has been developed to prepare a range of aqueous silver colloidal solutions, using ascorbic acid as a reducing agent, water-soluble starch as a combined crystallising, stabilising and solubilising agent, and water as the solvent. The diameter of silver nanoplatelets increases with higher concentrations of AgNO3 and starch. The silver nanoparticles are also more uniform in shape the greater the diameter of the nanoparticles. Colloidal solutions with a very high concentration of large, flat, hexagonal silver nanoplatelets (~230 nm in breadth) have been used to deposit and fix an antibacterial coating of these large starch-stabilised silver nanoplates on commercial cotton fibres, using a simple dip-coating process using water as the solvent, in order to study the dependence of the antibacterial properties of these nanoplatelets on their size.
authors.affiliation: Department of Chemistry, University of Hull, Cottingham Road, Hull HU6 7RX, United Kingdom.
authors.forename: Fei
authors.initials: F
authors.lastname: Cheng
authors.affiliation: Department of Chemistry, University of Hull, Cottingham Road, Hull HU6 7RX, United Kingdom.
authors.forename: Jonathan W
authors.initials: JW
authors.lastname: Betts
authors.affiliation: Department of Chemistry, University of Hull, Cottingham Road, Hull HU6 7RX, United Kingdom. Electronic address: s.m.kelly@hull.ac.uk.
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Kelly
authors.affiliation: Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom.
authors.forename: Andrew L
authors.initials: AL
authors.lastname: Hector
mesh_terms: D000890:Anti-Infective Agents / Q000494:pharmacology; D003102:Colloids; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures; D012834:Silver / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013213:Starch / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D000890:Anti-Infective Agents; D003102:Colloids; D014867:Water; D012834:Silver; D013213:Starch
keywords: Antibacterial textiles; Aqueous colloidal solutions; Green chemistry; Nanoplatelets; Seed-mediated synthesis; Silver; Water-soluble starch