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Citation: Zhang Xi-Yao, Pan Xin-Yu, Zhang Qi-Feng, Xu Bei-Xue, Jiang Hong-Bing, Liu Chun-Ling, Wu Jin-Lei. Synthesis of Silver Oxide Nano-scale Thin Films and Photoactivated Dynamic Luminescence from Their Nanoparticles[J]. Acta Physico-Chimica Sinica, ;2003, 19(03): 203-207. doi: 10.3866/PKU.WHXB20030303 shu

Synthesis of Silver Oxide Nano-scale Thin Films and Photoactivated Dynamic Luminescence from Their Nanoparticles

1.
Department of Electronics,National Key Laboratory of Artificial Microstructural and Mesoscopic Physics, Department of Physics, Peking University, Beijing　100871

Received Date: 17 June 2002
Available Online: 15 March 2003

Well spatial-dispersed and high purity silver oxide nanoparticles, whose size can be controlled from 5 nm to 30 nm, were prepared by vacuum thermal evaporation and glow discharge oxidation. To form island and keep samples in darkness are two key points of synthesis. Based on Ag3d and O1s binding energy and the ratio of silver atoms to oxide atoms given by XPS, the sample was confirmed to be Ag2O. X-ray diffraction of Ag2O nano-scale thin films was acquired and the strongest diffraction peaks referred to face (111), (110), (200) and (211) of Ag2O. Absorption spectra of the samples were also studied. The absorption spectrum indicates that band gap of silver oxide is 2.8 eV. After being photo-activated by blue light for a few minutes, intermittent green and yellow photoluminescence from silver oxide nanoparticles were observed with blue excitation. Luminescence from the same region excited by green light is red and also dynamic. This phenomenon was explained by electron transitions to the impurities energy levels induced by photolytic centers（Ag3O, Ag2＋O and Ag3＋O） in silver oxide.
- Silver oxide;Thin film;Nanoparticles;Photoluminescence
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