title: Non-stoichiometric W(18)O(49-x)S(x) nanowires for wide spectrum photosensors with high internal gain.
abstract: This study reports successful synthesis of non-stoichiometric single-crystal W18O49-xSx nanowires for photosensors with a high absorption rate (>83%) across a wide spectrum (300-2000 nm), a high internal gain (G = 10(6)-10(7)) and a relatively fast response time (approximately 1-3 s). In addition, the correlation between the photoconductivity gain (G) and the surface-to-volume ratio of non-stoichiometric single-crystal W18O49-xSx nanowires was studied. The surface-to-volume ratio and non-stoichiometric material of W18O49-xSx contributed to the photoconductivity gain; hence, the nanowires are favorable for photosensor devices. The wide spectrum obtained also suggests their extensive applications in numerous fields.
authors.affiliation: Department of Materials Science and Engineering, National Tsing-Hua University 101, Sec. 2, Kuang-Fu Road Hsinchu, Taiwan 30013. tryew@mx.nthu.edu.tw.
authors.forename: Yu-Ming
authors.initials: YM
authors.lastname: Hsu
authors.forename: Chiu-Yen
authors.initials: CY
authors.lastname: Wang
authors.forename: Pin
authors.initials: P
authors.lastname: Chang
authors.forename: Tri-Rung
authors.initials: TR
authors.lastname: Yew