Control of shell thickness in silica-coating of Agl nanoparticles

Y. Kobayashi, K. Misawa, M. Takeda, N. Ohuchi, A. Kasuya, M. Konno

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

Silica-coating of AgI nanoparticles with a Stöber method was carried out to find out reaction conditions for control of the shell thickness. The AgI nanoparticles were prepared from AgC1O4 and KI with the use of 3-mercaptopropyltrimethoxysilane (MPS) as a silane coupling agent and dimethylamine (DMA) catalyst for alkoxide hydrolysis. The silica-coating was performed at 4.5×10-6-4.5×10-5 M MPS, 11-20 M water, 0.002-0.1 M DMA and 0.005-0.04 M tetraethylorthosilicate at AgI concentrations of 0.1-1 mM. Consequently, AgI-silica core-shell particles could be prepared with the use of 4.5×10-5 M MPS, 20 M water, 0.01 M DMA and 1 mM AgI. Silica shell thickness could be varied from 15 to 28 nm with an increase in the TEOS concentration from 0.005 to 0.04 M.

Original languageEnglish
Title of host publicationAdvanced Materials and Processing IV - Selected, peer reviewed papers presented at the 4th International Conference on Advanced Materials and Processing
PublisherTrans Tech Publications
Pages191-194
Number of pages4
ISBN (Print)0878494669, 9780878494668
DOIs
Publication statusPublished - 2007
Event4th International Conference on Advanced Materials and Processing, ICAMP-4 - Hamilton, New Zealand
Duration: 2006 Dec 102006 Dec 13

Publication series

NameAdvanced Materials Research
Volume29-30
ISSN (Print)1022-6680

Other

Other4th International Conference on Advanced Materials and Processing, ICAMP-4
Country/TerritoryNew Zealand
CityHamilton
Period06/12/1006/12/13

Keywords

  • Agi
  • Core-shell
  • Nanoparticle
  • Silica-coating
  • Sol-gel
  • Stöber method

ASJC Scopus subject areas

  • Engineering(all)

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