A study of the nucleation and growth of silver nanowires on titanium dioxide

Hungtao Chen,Hsientse Tung,Jennming Song,Ingann Chen, Hsinyu Lee

Nanotechnology（2011）

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摘要

Silver nanowire (Ag NWs) have been successfully synthesized by thermally assisted photoreduction (TAP) of aqueous silver nitrate (AgNO3) solution on titanium dioxide (TiO2) films [1]. Nevertheless, the nucleation and nucleation and growth of the Ag NWs on TiO2 substrate were monitored in detail by in-situ synchrotron radiation x-ray diffraction (SR-XRD). As-annealed TiO2 film, followed by heating from 60 to 300°C, shows strong in-situ SR-XRD ratios of Ag(220)/Ag(200) spectra, indicating the preferred growth direction of NWs toward <;220>;. The nano-Auger electron spectrum (AES) demonstrates that silver nano-particles could was locally at room temperature on as-annealed TiO2, which was partially excited by blackbody radiation. These Ag clusters will act as nucleation site for Ag NWs. It implies that the homogeneity and amount of electrons on the TiO2 surface and the accumulative direction of Ag atoms are the key points for Ag Nws synthesis.

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关键词

auger electron spectra,x-ray diffraction,annealing,nanofabrication,nanoparticles,nanowires,nucleation,reduction (chemical),silver,ultraviolet radiation effects,ag,sr-xrd,tio2,uv radiation,aqueous silver nitrate solution,blackbody radiation,heating,insitu synchrotron radiation x-ray diffraction,nanoauger electron spectra,silver nanoparticles,silver nanowire growth,temperature 293 k to 298 k,temperature 60 degc to 300 degc,thermally assisted photoreduction,titanium dioxide substrate thin films,orientation,synchrotron radiation x-ray diffraction,diffraction,polymers,room temperature,synchrotron radiation,x ray diffraction,spectrum

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