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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (14): 1617-1621. 上一篇    下一篇

研究论文

一种制备高长径比金纳米棒的新方法

高倩1,2，钱勇1,2，夏炎1，蒋彩云1，钱卫平*,1   

  1. (1东南大学生物科学与医学工程学院 生物电子学国家重点实验室 南京 210096)
    (2东南大学化学化工学院 南京 211189)
  • 投稿日期:2011-01-19 修回日期:2011-03-18 发布日期:2011-03-28
  • 通讯作者: 钱卫平 E-mail:wqian@seu.edu.cn
  • 基金资助:

    国家自然科学基金;国家863计划

A Novel Method to Prepare High-aspect Ratio Gold Nanorods

Gao Qian1,2 Qian Yong1,2 Xia Yan1 Jiang Caiyun1 Qian Weiping*,1   

  1. (1 State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096)
    (2 School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189)
  • Received:2011-01-19 Revised:2011-03-18 Published:2011-03-28
  • Contact: Weiping Qian E-mail:wqian@seu.edu.cn

PDF

3247

被引次数

7

报道了一种制备高长径比金纳米棒的新方法. 在25 ℃条件下, 采用种子介导生长法, 通过优化表面活性剂十六烷基三甲基溴化铵(CTAB)的浓度, 制备了长度(200±18.62) nm, 长径比大于10的金纳米棒, 并讨论了金纳米棒的形成机制. 结果表明, 金纳米棒的长径比和纵向吸收波长与CTAB的浓度有关. 此外, 通过提高反应液的离子强度, 利用制备的金纳米棒与球形颗粒不同的静电作用将金纳米棒分离纯化. 运用透射电子显微镜(TEM)和扫描电子显微镜(SEM)对金纳米棒的表面形貌进行表征.

关键词: 金纳米棒, 十六烷基三甲基溴化铵, 离子强度, 高长径比

A novel approach to high-aspect ratio gold nanorods has been presented. The gold nanorods as long as (200±18.62) nm with aspect ratio of above 10 were prepared with optimizing the concentration of surfactant cetyltrimethylammonium bromide (CTAB) by seed-mediated growth method at 25 ℃. Mechanism for gold nanorods formation is discussed. It is shown that the aspect ratio and longitudinal surface plasmon resonance (SPR) can be correlated with the concentration of CTAB. Moreover, by simply enhancing the ion strength of the reaction solution, the as-prepared gold nanorods can be purified for the different electrostatic aggregation effects between gold nanorods and spherical nanoparticles. Shape change of gold nanorods is confirmed by transmission electron microscopy images (TEM) and scan electron microscopy (SEM).

Key words: gold nanorods, CTAB, ion strength, high aspect ratio