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Exfoliation-restacking route to Au nanoparticle-clay nanohybrids

Title
Exfoliation-restacking route to Au nanoparticle-clay nanohybrids
Authors
Paek S.-M.Jang J.-U.Hwang S.-J.Choy J.-H.
Ewha Authors
최진호황성주
SCOPUS Author ID
최진호scopus; 황성주scopus
Issue Date
2006
Journal Title
Journal of Physics and Chemistry of Solids
ISSN
0022-3697JCR Link
Citation
vol. 67, no. 5-6, pp. 1020 - 1023
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
A novel gold-pillared aluminosilicate (Au-PILC) were synthesized with positively charged gold nanoparticles capped by mercaptoammonium and exfoliated silicate layers. Gold nanoparticles were synthesized by NaBH4 reduction of AuCl4- in the presence of N,N,N-Trimethyl (11-mercaptoundecyl)ammonium (HS(CH2)11NMe3+) protecting ligand in an aqueous solution, and purified by dialysis. The resulting positively charged and water-soluble gold nanoparticles were hybridized with exfoliated silicate sheets by electrostatic interaction. The formation of Au-clay hybrids could be easily confirmed by the powder X-ray diffraction with the increased basal spacing of clay upon insertion of Au nanoparticles. TEM image clearly revealed that the Au particles with an average size of 4 nm maintain their structure even after intercalation. The Au nanoparticles supported by clay matrix were found to be thermally more stable, suggesting that the Au nanoparticles were homogeneously protected with clay nanoplates. The present synthetic route could be further applicable to various hybrid systems between metal nanoparticles and clays. © 2006 Elsevier Ltd. All rights reserved.
DOI
10.1016/j.jpcs.2006.01.021
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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