Boies, AM and Roberts, JT and Girshick, SL and Zhang, B and Nakamura, T and Mochizuki, A (2009) SiO2 coating of silver nanoparticles by photoinduced chemical vapor deposition. Nanotechnology, 20. 295604-.Full text not available from this repository.
Gas-phase silver nanoparticles were coated with silicon dioxide (SiO2) by photoinduced chemical vapor deposition (photo-CVD). Silver nanoparticles, produced by inert gas condensation, and a SiO2 precursor, tetraethylorthosilicate (TEOS), were exposed to vacuum ultraviolet (VUV) radiation at atmospheric pressure and varying temperatures. The VUV photons dissociate the TEOS precursor, initiating a chemical reaction that forms SiO2 coatings on the particle surfaces. Coating thicknesses were measured for a variety of operation parameters using tandem differential mobility analysis and transmission electron microscopy. The chemical composition of the particle coatings was analyzed using energy dispersive x-ray spectrometry and Fourier transform infrared spectroscopy. The highest purity films were produced at 300-400 degrees C with low flow rates of additional oxygen. The photo-CVD coating technique was shown to effectively coat nanoparticles and limit core particle agglomeration at concentrations up to 10(7) particles cm(-3).
|Uncontrolled Keywords:||Equipment Design Gases Metal Nanoparticles Microscopy, Electron, Transmission Nanotechnology Photochemistry Silanes Silicon Dioxide Silver Spectroscopy, Fourier Transform Infrared Ultraviolet Rays Vacuum Volatilization|
|Divisions:||Div A > Energy|
|Depositing User:||Cron job|
|Date Deposited:||04 Feb 2015 22:07|
|Last Modified:||29 May 2015 11:15|