| 光谱学与光谱分析 |
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| The Photoluminescence and Absorption Properties of Co/AAO Nano-Array Composites |
| LI Shou-yi1,WANG Cheng-wei1,2*,LI Yan1,WANG Jian1,MA Bao-hong1 |
1. College of Physics and Electron Engineering,Northwest Normal University,Lanzhou 730070,China
2. State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China |
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Abstract Ordered Co/AAO nano-array structures were fabricated by alternating current (AC) electrodeposition method within the cylindrical pores of anodic aluminum oxide (AAO) template prepared in oxalic acid electrolyte. The photoluminescence (PL) emission and photoabsorption of AAO templates and Co/AAO nano-array structures were investigated respectively. The results show that a marked photoluminescence band of AAO membranes occurs in the wavelength range of 350-550 nm and their PL peak position is at 395 nm. And with the increase in the deposition amount of Co nanoparticles,the PL intensity of Co/AAO nano-array structures decreases gradually,and their peak positions of the PL are invariable (395 nm). Meanwhile the absorption edges of Co/AAO show a larger redshift,and the largest shift from the near ultraviolet to the infrared exceeds 380 nm. The above phenomena caused by Co nano-particles in Co/AAO composite were analyzed.
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Received: 2006-10-08
Accepted: 2007-01-16
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Corresponding Authors:
WANG Cheng-wei
E-mail: cwwang@nwnu.edu.cn
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