期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 343, 期 1, 页码 25-30出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2009.10.075
关键词
Aspect ratio; CTAB; Gold; Nanorods; Stability; Synthesis
资金
- Swedish Foundation for Strategic Research (SSF)
A systematic study is performed of the influence of surfactant and temperature on the aspect ratio and monodispersity of Au nanorods, synthesized by a seed-mediated growth technique in water using cetyl-trimethylammonium bromide (CTAB) as surfactant. The changes in aspect ratio with temperature show all anomalous behavior, where the aspect ratio first decreases with increasing temperature, reaching a minimum at about 55 degrees C, and after that increases again reaching a maximum at about 80 degrees C. A physical explanation of the observed behavior is proposed. It has also been studied how the CTAB concentration in the cleansing water used in the post-synthesis treatment of the samples affected the stability of the gold suspension. It was found that without the presence of a surfactant such as CTAB in the washing medium, only very few centrifugations can be carried out without considerable loss of product. Characterization of prepared samples was performed with UV-Vis and TEM. (C) 2009 Elsevier Inc. All rights reserved.
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