Preparation of highly dispersed core/shell-type titania nanocapsules containing a single Ag nanoparticle

Hideki Sakai, Takashi Kanda, Hirobumi Shibata, Takahiro Ohkubo, Masahiko Abe

Research output: Contribution to journalArticle

174 Citations (Scopus)

Abstract

Core/shell-type titania nanocapsules containing a single Ag nanoparticle were prepared. Ag nanoparticles were prepared using the reduction of silver nitrate with hydrazine in the presence of cetyltrimethylammonium bromide (CTAB) as protective agent. The sol-gel reaction of titanium tetraisopropoxide (TTIP) was used to prepare core/shell-type titania nanocapsules with CTAB-coated Ag nanoparticles as the core. TEM observations revealed that the size of the core (Ag particle) and the thickness of the shell (titania) of the core/shell particles obtained are about 10 nm and 5-10 nm, respectively. In addition, the nanocapsules were found to be dispersed in the medium as individual particles without aggregation. Moreover, titania coating caused the surface plasmon absorption of Ag nanoparticles to shift toward the longer wavelength side.

Original languageEnglish
Pages (from-to)4944-4945
Number of pages2
JournalJournal of the American Chemical Society
Volume128
Issue number15
DOIs
Publication statusPublished - Apr 19 2006
Externally publishedYes

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Nanocapsules
Nanoparticles
Titanium
hydrazine
Protective Agents
Silver Nitrate
Polymethyl Methacrylate
Hydrazine
Sol-gels
Agglomeration
Gels
Nitrates
Transmission electron microscopy
Silver
Coatings
Wavelength
titanium dioxide

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Preparation of highly dispersed core/shell-type titania nanocapsules containing a single Ag nanoparticle. / Sakai, Hideki; Kanda, Takashi; Shibata, Hirobumi; Ohkubo, Takahiro; Abe, Masahiko.

In: Journal of the American Chemical Society, Vol. 128, No. 15, 19.04.2006, p. 4944-4945.

Research output: Contribution to journalArticle

Sakai, Hideki ; Kanda, Takashi ; Shibata, Hirobumi ; Ohkubo, Takahiro ; Abe, Masahiko. / Preparation of highly dispersed core/shell-type titania nanocapsules containing a single Ag nanoparticle. In: Journal of the American Chemical Society. 2006 ; Vol. 128, No. 15. pp. 4944-4945.
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