title: Rapidly synthesized ZnO nanowires by ultraviolet decomposition process in ambient air for flexible photodetector.
abstract: We are the first group to use a simple direct ultraviolet light (UV, λ=365 nm, I=76 mW cm(-2)) in a decomposition process to fabricate ZnO nanowires on a flexible substrate using a zinc acetylacetonate hydrate precursor in ambient air. ZnO nanocrystal (or nanowire) production only requires three to ten minutes. A field emission scanning electron microscopy (FESEM) image reveals a high aspect ratio of the ZnO nanowires, which are grown on a substrate with a diameter of ∼50-100 nm, and a length of up to several hundred microns. High resolution transmission electron microscopy (HRTEM) images reveal that the nanowires consist of many single crystalline ZnO nanoparticles that grow along the c axis, which suggests an oriented attachment process. A potential application for flexible UV photodetectors was investigated using a UV lamp (λ=365 nm, I=2.34 mW cm(-2)). A significant ratio of photocurrent to dark current--around 11,300%--was achieved.
authors.affiliation: Department of Materials Science and Engineering, Feng Chia University, 100 Wenhwa Rd, Seatwen, Taichung 40724, Taiwan. jmwu@fcu.edu.tw
authors.forename: Jyh Ming
authors.initials: JM
authors.lastname: Wu
authors.forename: Yi-Ru
authors.initials: YR
authors.lastname: Chen
authors.forename: Yu-Hung
authors.initials: YH
authors.lastname: Lin
mesh_terms: D000388:Air; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure; D010783:Photometry / Q000295:instrumentation*; D014466:Ultraviolet Rays; D015034:Zinc Oxide / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D015034:Zinc Oxide