Microstructure and optical absorption properties of Au/NiO thin films

• Published in: International journal of minerals, metallurgy and materials metallurgy and materials, 2011-02, Vol.18 (1), p.115-120
• Main Authors: Zhao, Cui-hua, Zhang, Bo-ping, Wang, Shi-jing, Shang, Peng-peng, Chen, Can
• Format: Article
• Language: English
• Subjects: Absorption; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Corrosion and Coatings; Glass; Gold; Materials Science; Metallic Materials; Metallurgy; Microstructure; Natural Materials; Nickel oxides; Optical properties; Particulate composites; Photoelectrons; Solid phases; Spectrometers; Surface chemistry; Surface plasmon resonance; Surfaces and Interfaces; Thin Films; Tribology; X ray photoelectron spectroscopy; X-ray diffraction; X-rays
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-011-0409-x

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.