Effects of Co-Surfactants on the formation of gold nanorods

Koji Nishioka, Yasuro Niidome, Sunao Yamada

Research output: Contribution to conferencePaper

Abstract

The effects of ammonium salts and anionic amphiphiles on the formation and morphology of gold nanorods (NRs) in hexadecyltrimethyl- ammonium bromide solutions were investigated. The addition of a small amount of tetrahexyl- ammonium bromide (THAB) increased the aspect ratio of NRs, while an excess of THAB or tetradodecylammonium bromide (TDAB) decreased the aspect ratio, and concomitantly increased the formation of spherical gold nanoparticles. In contrast, the addition of anionic amphiphiles forming hydrophobic ion-complexes with CTAB did not decrease the aspect ratio, but suppressed the formation of NRs. These results could be attributed to the change in the adsorbed layer of CTAB on the gold NRs.

Original languageEnglish
Number of pages1
Publication statusPublished - Oct 18 2006
Event55th SPSJ Annual Meeting - Nagoya, Japan
Duration: May 24 2006May 26 2006

Other

Other55th SPSJ Annual Meeting
CountryJapan
CityNagoya
Period5/24/065/26/06

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Nanorods
Surface active agents
Gold
Aspect ratio
Amphiphiles
Salts
Nanoparticles
Ions

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Nishioka, K., Niidome, Y., & Yamada, S. (2006). Effects of Co-Surfactants on the formation of gold nanorods. Paper presented at 55th SPSJ Annual Meeting, Nagoya, Japan.

Effects of Co-Surfactants on the formation of gold nanorods. / Nishioka, Koji; Niidome, Yasuro; Yamada, Sunao.

2006. Paper presented at 55th SPSJ Annual Meeting, Nagoya, Japan.

Research output: Contribution to conferencePaper

Nishioka, K, Niidome, Y & Yamada, S 2006, 'Effects of Co-Surfactants on the formation of gold nanorods' Paper presented at 55th SPSJ Annual Meeting, Nagoya, Japan, 5/24/06 - 5/26/06, .
Nishioka K, Niidome Y, Yamada S. Effects of Co-Surfactants on the formation of gold nanorods. 2006. Paper presented at 55th SPSJ Annual Meeting, Nagoya, Japan.
Nishioka, Koji ; Niidome, Yasuro ; Yamada, Sunao. / Effects of Co-Surfactants on the formation of gold nanorods. Paper presented at 55th SPSJ Annual Meeting, Nagoya, Japan.1 p.
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N2 - The effects of ammonium salts and anionic amphiphiles on the formation and morphology of gold nanorods (NRs) in hexadecyltrimethyl- ammonium bromide solutions were investigated. The addition of a small amount of tetrahexyl- ammonium bromide (THAB) increased the aspect ratio of NRs, while an excess of THAB or tetradodecylammonium bromide (TDAB) decreased the aspect ratio, and concomitantly increased the formation of spherical gold nanoparticles. In contrast, the addition of anionic amphiphiles forming hydrophobic ion-complexes with CTAB did not decrease the aspect ratio, but suppressed the formation of NRs. These results could be attributed to the change in the adsorbed layer of CTAB on the gold NRs.

AB - The effects of ammonium salts and anionic amphiphiles on the formation and morphology of gold nanorods (NRs) in hexadecyltrimethyl- ammonium bromide solutions were investigated. The addition of a small amount of tetrahexyl- ammonium bromide (THAB) increased the aspect ratio of NRs, while an excess of THAB or tetradodecylammonium bromide (TDAB) decreased the aspect ratio, and concomitantly increased the formation of spherical gold nanoparticles. In contrast, the addition of anionic amphiphiles forming hydrophobic ion-complexes with CTAB did not decrease the aspect ratio, but suppressed the formation of NRs. These results could be attributed to the change in the adsorbed layer of CTAB on the gold NRs.

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