AVS 52nd International Symposium
    Nanometer-Scale Science and Technology Tuesday Sessions
       Session NS-TuP

Paper NS-TuP23
Temperature-induced Control of the Aspect Ratio of Gold Nanorods

Tuesday, November 1, 2005, 4:00 pm, Room Exhibit Hall C&D

Session: Nanometer Scale Science and Technology Poster Session
Presenter: W.S. Yun, Korea Research Institute of Standards and Science
Authors: H.J. Park, Korea Research Institute of Standards and Science
C.S. Ah, Korea Research Institute of Standards and Science
K.-P. Lee, Kyungpook National University, Korea
I.S. Choi, KAIST, Korea
W.S. Yun, Korea Research Institute of Standards and Science
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Aspect ratio of gold nanorods can be controlled by simply adjusting the reaction temperature in the seed-mediated synthesis of the nanorods. At various reaction temperatures between 276 and 313 K, the gold nanorods were prepared by the injection of gold nanoparticles of around 4 nm in diameter into a reaction mixture consisting of hydrogen tetrachloroaurate, hexadecyltrimethylammonium bromide, and ascorbic acid. Average aspect ratio of the resulting nanorod increases from 1 to about 40 with decreasing the reaction temperature, which can be attributed to temperature-induced change in the stability of the micellar templates.