ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Silica-coating of AgI nanoparticles with a Stöber method was carried out to find outreaction conditions for control of the shell thickness. The AgI nanoparticles were prepared fromAgClO4 and KI with the use of 3-mercaptopropyltrimethoxysilane (MPS) as a silane coupling agentand dimethylamine (DMA) catalyst for alkoxide hydrolysis. The silica-coating was performed at4.5×10-6-4.5×10-5 M MPS, 11-20 M water, 0.002-0.1 M DMA and 0.005-0.04 Mtetraethylorthosilicate at AgI concentrations of 0.1-1 mM. Consequently, AgI-silica core-shellparticles could be prepared with the use of 4.5×10-5 M MPS, 20 M water, 0.01 M DMA and 1 mMAgI. Silica shell thickness could be varied from 15 to 28 nm with an increase in the TEOSconcentration from 0.005 to 0.04 M
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.29-30.191.pdf
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