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以有序的多孔氧化铝为模板 ,利用交流电在孔洞中沉积金属铜得到纳米Cu粒子 Al2 O3 组装体系 .透射电镜观察显示随着交流电沉积时间的延长 ,孔洞中纳米Cu粒子数量增加 .测量了纳米Cu粒子 Al2 O3 组装体系的紫外可见光吸收光谱 ,发现随着孔洞中纳米Cu粒子数量增加 ,纳米Cu粒子 Al2 O3 组装体系的吸收带边大幅度红移 ;根据雷利散射引起的消光增强解释了组装体吸收带边红移的原因 .同时发现Cu粒子的表面等离子共振吸收峰消失及组装体在吸收带边区光吸收值满足间接带隙半导体光吸收边的表达式 .
The ordered porous alumina was used as the template to deposit copper nanoparticles into Cu2Al3O3 nanostructured Cu-Al2 O3 composites by alternating current (AC). The transmission electron microscopy showed that the number of Cu nanoparticles increases with the increase of deposition time, UV-visible absorption spectra of the Cu2Al2O3 assembly system show that with increasing the number of Cu nanoparticles in the pores, the absorption band edge of the Al2O3 nanocrystalline Cu particle system greatly red shifts; the assembly is explained based on the extinction enhancement caused by Rayleigh scattering The reason for the band-edge redshift of bulk absorption is also found. The surface plasmon resonance absorption peak of Cu particles disappears and the expression of light absorption of the assembly in the edge of the absorption band satisfies the absorption edge of the indirect band gap semiconductor.