TY - JOUR
T1 - Effects of ammonium salts and anionic amphiphiles on the photochemical formation of gold nanorods
AU - Niidome, Yasuro
AU - Nishioka, Koji
AU - Kawasaki, Hideya
AU - Yamada, Sunao
N1 - Funding Information:
This study was supported in part by The Industrial Technology Research Grant Program in 2003 from The New Energy and Industrial Technology Development Organization (NEDO) of Japan, and a Grant-in-Aid for Scientific Research (C) from The Japan Society for Promotion of Science (JSPS) (No. 14550802). We would like to thank The Research Laboratory for High Voltage Electron Microscopy in Kyushu University for the TEM measurements.
PY - 2005/5/5
Y1 - 2005/5/5
N2 - The effects of ammonium salts and anionic amphiphiles on the formation and morphology of gold nanorods (NRs) in hexadecyltrimethylammonium bromide (CTAB) solutions were investigated. The addition of a small amount of tetrahexylammonium 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 hexadecyltrimethylammonium bromide (CTAB) solutions were investigated. The addition of a small amount of tetrahexylammonium 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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U2 - 10.1016/j.colsurfa.2004.10.015
DO - 10.1016/j.colsurfa.2004.10.015
M3 - Article
AN - SCOPUS:15044357452
SN - 0927-7757
VL - 257-258
SP - 161
EP - 164
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
ER -