title: Si nanowire directly grown on a liquid metal substrate--towards wafer scale transferable nanowire arrays with improved visible-light sterilization.
abstract: Integrating vertically aligned nanowires (NWs) on a functional substrate is important for the application of NWs in wafer scale assemblies and functional devices. However, vertically aligned NWs via the current epitaxial growth route can only be prepared on crystalline wafers. A convenient method is thus presented to overcome NW substrate limitations. Liquid metal is proposed to serve as a substrate for the initial growth of vertically aligned NWs. NWs could then be harvested from the growth substrate and integrated with functional substrates. Fabricated vertically aligned silicon NWs (SiNWs) were grown on molten Sn and then integrated into a flexible transparent poly(dimethylsiloxane) film to obtain a SiNW/functional substrate device. The device showed enhanced visible-light absorption ability and refreshable visible-light bactericidal activities with a bacterial reduction rate of close to 100%, indicating that growth with molten metal as a substrate could be a promising approach for extending the function and application of NWs.
authors.affiliation: Nano-organic Photoelectronic Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.forename: Jian-Tao
authors.initials: JT
authors.lastname: Wang
authors.forename: Xue-Mei
authors.initials: XM
authors.lastname: Ou
authors.forename: Chun-Sing
authors.initials: CS
authors.lastname: Lee
authors.forename: Xiao-Hong
authors.initials: XH
authors.lastname: Zhang
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D001701:Bionics; D004129:Dimethylpolysiloxanes / Q000737:chemistry* / Q000494:pharmacology; D004926:Escherichia coli / Q000187:drug effects / Q000528:radiation effects; D008027:Light; D036103:Nanotechnology; D053770:Nanowires / Q000737:chemistry* / Q000382:microbiology* / Q000648:ultrastructure; D012825:Silicon / Q000737:chemistry* / Q000494:pharmacology; D013242:Sterilization; D014001:Tin / Q000737:chemistry
chemical_list: D000900:Anti-Bacterial Agents; D004129:Dimethylpolysiloxanes; D014001:Tin; D012825:Silicon