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    题名: Photoconduction and the electronic structure of silica nanowires embedded with gold nanoparticles
    作者: Pao, C.-W.;Wu, C.-T.;Tsai, H.-M.;Liu, Y.-S.;Chang, C.-L.;Pong, W. F.;Chiou, J.-W.;Chen, C.-W.;Hu, M.-S.;Chu, M.-W.;Chen, L.-C.;Chen, C.-H.;Chen, K.-H.;Wang, S.-B.;Chang, S.-J.;Tsai, M.-H.;Lin, H.-J.;Lee, J.-F.;Guo, J.-H.
    贡献者: 淡江大學物理學系暨研究所
    日期: 2011-10
    上传时间: 2014-03-06 15:52:06 (UTC+8)
    出版者: College Park: American Physical Society
    摘要: Silica nanowires (SiOx-NWs) embedded with Au peapods have been studied by energy-filtered scanning transmission electron microscopy (EFTEM), O K- and Au L3-edge x-ray absorption near-edge structure (XANES), and extended x-ray absorption fine structure (EXAFS), x-ray emission spectroscopy (XES) and scanning photoelectron microscopy. XANES and XES data show that band gaps of Au-peapod-embedded and pure SiOx-NWs were 6.8 eV. In additional, XANES and EXAFS results indicate illumination-induced electron transfer from Au peapod to SiOx-NWs and does not show any feature attributable to the formation of Au-Si bonding in the Au peapod embedded in SiOx-NWs with or without illumination. Photoresponse and EFTEM measurements show that green light has more significant enhancement of photoconductivity than red and blue light due to surface plasmon resonance and suggest that transport of electrons across SiOx-NWs is via Mott-variable-range hopping mechanism through localized or defect states.
    關聯: PHYSICAL REVIEW B 84, 165412(8pages)
    DOI: 10.1103/PhysRevB.84.165412
    显示于类别:[物理學系暨研究所] 期刊論文

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