Microstructure and optical absorption properties of Au/NiO thin films

Cui-hua Zhao1,2),Bo-ping Zhang1),Shi-jing Wang1),Peng-peng Shang1),and Can Chen1) 1) School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China 2) College of Materials Science and Engineering,Guangxi University,Nanning 530004,China

摘 要：Au nanoparticles dispersed NiO composite films were prepared by a chemical solution method.The phase structure,microstructure,surface chemical state,and optical absorption properties of the films were characterized by X-ray diffraction,transmission electron microscopy,X-ray photoelectron spectroscopy,and Uv-vis spectrometer.The results indicate that Au particles with the average diameters of 35-42 nm are approximately spherical and disperse in the NiO matrix.The optical absorption peaks due to the surface plasmon resonance of Au particles shift to the shorter wavelength and intensify with the increase of Au content.The bandwidth narrows when the Au content increases from 8.4wt% to 45.2wt%,but widens by further increasing the Au content from 45.2wt% to 60.5wt%.The band gap Eg increases with the increase of Au contents from 8.4wt% to 45.2wt%,but decreases by further increasing the Au content.

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