高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (5): 706.doi: 10.7503/cjcu20170061

• 研究论文: 无机化学 • 上一篇    下一篇

金纳米棒的生长及与FeCl3的作用

韩林唤, 李凯丰, 陈艳伟()   

  1. 东北师范大学物理学院, 紫外光发射材料与技术教育部重点实验室, 长春 130024
  • 收稿日期:2017-01-23 出版日期:2017-05-10 发布日期:2017-04-20
  • 作者简介:联系人简介: 陈艳伟, 女, 博士, 副教授, 主要从事纳米材料及其生物应用研究. E-mail:yanweichen@nenu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 11174047)资助

Growth of Gold Nanorods and Their Interaction with Ferric Chloride

HAN Linhuan, LI Kaifeng, CHEN Yanwei*()   

  1. Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, School of Physics, Northeast Normal University, Changchun 130024, China
  • Received:2017-01-23 Online:2017-05-10 Published:2017-04-20
  • Contact: CHEN Yanwei E-mail:yanweichen@nenu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.11174047)

摘要:

采用三氯化铁选择性刻蚀法获得了预定长径比的金纳米棒. 相比于晶种生长法, 三氯化铁选择性刻蚀法可以更加简便快捷地调控金纳米棒形貌. 以三氯化铁为刻蚀剂的刻蚀反应优先发生在金纳米棒尖端, 这是因为金纳米棒尖端反应活性更高且表面活性剂钝化作用更弱. 通过控制刻蚀反应时间及刻蚀剂浓度, 可以精确调控金纳米棒的长径比. 实验结果表明, 增加刻蚀剂浓度、 卤素离子浓度以及升高反应温度可以加快刻蚀反应速率. 进一步讨论了金属离子的刻蚀作用机理.

关键词: 金纳米棒, 三氯化铁, 刻蚀, 表面等离子体共振

Abstract:

Gold nanorods(AuNRs) with predetermined aspect ratios were obtained by the ferric chloride(FeCl3) selective etching method. Compared with the seed growth method, the FeCl3 selective etching method is simpler and faster. The etching reaction takes place preferentially at the tip of gold nanorods due to the higher reaction activity and the less surface passivation at the tips of the gold nanorod. By controlling the reaction time and the concentration of the etchant, the aspect ratio of the gold nanorods can be precisely controlled. The experimental results show that the reaction rate increased by increasing the concentrations of the etchant and the halide ion and the reaction temperature. The mechanism of metal ion etching was also disscussed.

Key words: Gold nanorods, Ferric chloride, Etching, Surface plasmon resonance

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