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Preparation Au/SiO2 Composite Nanoparticle Films and SiO2 Nanowires

Author: ZhangQiuXia
Tutor: LiYuGuo
School: Shandong Normal University
Course: Microelectronics and Solid State Electronics
Keywords: Au/SiO2 Composite nanoparticles film Self-assembly SiO2 nanowires
CLC: TB383.1
Type: Master's thesis
Year: 2008
Downloads: 82
Quote: 1
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Abstract


In recent years, the growth of the metal nano-particles in the oxide matrix, due to their chemical physical characteristics can be changed by the particle size, shape and interaction caused worldwide attention. Especially surface effect and quantum size effect, change their characteristics. Growth of metal clusters on oxide matrix has a number of potential applications, such as important applications in heterogeneous catalysis, gas sensor and electromagnetic material. In one of these metal oxide nano-composite material to SiO 2 for the matrix of the metal nano-clusters is widely used in the controllable non-linear integrated optical devices on the surface of these devices third-order susceptibility χ plasmon resonance frequency was significantly enhanced. SiO 2 glass and silicon-based microelectronic devices and an important part of the optical fiber, basic and potential applications in electronic and optical devices, has gradually become a one-dimensional nanomaterials candidate persons. At present, domestic and foreign film in the form of Au / SiO 2 nanoparticle composites rarely, and thus has a relatively broad area of ??research. In this paper, the magnetron sputtering technology to prepare metal nanoparticles dispersed oxide Au / SiO 2 composite membrane. Au particles using this method is due to the sputtering method is one of the best way of the many methods which can be obtained in a low temperature and under controlled conditions in a uniform surface coverage, can be uniformly dispersed into the of SiO 2 the matrix, than other methods good place there it can control the metal content, the metal content reaches a high value. We also use the self-assembly method of preparation of the growth of one-dimensional nanomaterials template as a growth template Au / SiO 2 Nanosystems catalytic VLS growth mechanism based auxiliary the growth process generate SiO 2 < / sub> nanowires. Magnetron sputtering, annealing successfully prepared uniform surface coverage of Au / SiO 2 composite nanoparticle film. And scanning electron microscopy (SEM) and X-ray diffraction (XRD) after different temperature annealing of Au / SiO 2 composite film surface roughness, microstructure characterized. Come to the best growing conditions. 2 composite film annealed at 1000 ℃ Au nanodots self-assembled generate uniform spatial distribution (diameter of about 70nm). Semiconductor self-assembled quantum dot material has an important role in the field of optoelectronic and microelectronic devices. It is prepared excellent performance of the optoelectronic and microelectronic devices, such as optical fiber communication lasers, photodetectors, high electron mobility transistor, the electro-optic modulator, such as the main choice of one of the objects. The growth of quantum dots in the preparation of semiconductor quantum dot material, self-organizing method has many special advantages, and thus from the organization's growth and physical properties of the Au nanodots characterization become a hot topic in the physics of low-dimensional semiconductor materials and device research areas. The Au nanodots self-organization generated as the growth of one-dimensional nanomaterials template. Grown on the self-assembly of Au catalyst template SiO 2 nanowires, a diameter of approximately 100 nm, a length of about 4 microns, the surface is smooth, straight and uniform thickness. A brief description of the general process of the nanowire growth, the nanowire growth process in line with the VLS growth mechanism.

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