Room-Temperature Size Evolution of Thiol-Protected Gold Nanoparticles Assisted by Proton Acids and Halogen Anions

被引:30
作者
Kanehara, Masayuki [1 ]
Sakurai, Jun-ichi [1 ]
Sugimura, Hiroyuki [2 ]
Teranishi, Toshiharu [1 ]
机构
[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan
[2] Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Kyoto 6068501, Japan
关键词
PHASE;
D O I
10.1021/ja8058167
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In the present work, a mild size-control method for thiol-protected Au NPs was developed. When thiol-protected Au NIPS were reacted with tetra-n-octylammonium bromide and trifluoroacetic acid, the size of Au NPs was tuned in the range from 2 to 6 nm at room temperature. Larger Au NPs could be obtained by mild heating at 55 degrees C. This size evolution method assisted by proton acid and bromide anion is a first example of the size tuning of thiol-protected Au NPs at room temperature. Because of the mild reactivity of acid and bromide ions to organic molecules, various thiol derivatives sensitive to heat, base, and reducing agent can be utilized for this method.
引用
收藏
页码:1630 / +
页数:3
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