高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (4): 517.doi: 10.7503/cjcu20160930

• 研究论文: 无机化学 • 上一篇    下一篇

金纳米棒的表面改性及与H2O2的作用

石雯, 单桂晔(), 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:2016-12-23 出版日期:2017-04-10 发布日期:2017-03-22
  • 作者简介:联系人简介: 单桂晔, 女, 博士, 副教授, 主要从事纳米生物学研究. E-mail: shangy229@nenu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 11740077)资助

Surface Modification of Au Nanorods and Their Interaction with H2O2

SHI Wen, SHAN Guiye*(), CHEN Yanwei   

  1. School of Physics, Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China
  • Received:2016-12-23 Online:2017-04-10 Published:2017-03-22
  • Contact: SHAN Guiye E-mail:shangy229@nenu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.11740077)

摘要:

通过调控过氧化氢与金纳米棒相互作用时溶液的H+和Br-浓度, 考察了过氧化氢刻蚀金纳米棒的条件. 通过静电相互作用将聚苯乙烯磺酸钠修饰到带正电的金纳米棒表面, 并探讨了表面配体变化对过氧化氢与金纳米棒相互作用的影响, 比较了聚苯乙烯磺酸钠浓度改变对过氧化氢刻蚀金纳米棒所引起的等离子体吸收峰的变化. 结果表明, 过氧化氢与金纳米棒作用过程中, H+浓度增加可以加快刻蚀反应速率, Br-起到稳定金离子的作用. 采用聚苯乙烯磺酸钠修饰抑制了过氧化氢对金纳米棒的刻蚀, 当聚苯乙烯磺酸钠与金纳米棒表面的CTAB完全作用后, 复合材料电位接近零, 金纳米棒的稳定性降低, 继续增加聚苯乙烯磺酸钠的量至电位为负, 复合材料稳定性增加.

关键词: 金纳米棒, 表面等离子体共振, 聚苯乙烯磺酸钠, 过氧化氢

Abstract:

The interaction conditions for H2O2 with Au nanorods(Au NRs) were investigated by changing the concentrations of H+ and Br- in the reaction solution. Au NRs with positively surface were modified by poly(sodium-styrenesulfonate)(PSS) via electrostatic interaction to detect the effect of different ligands on the interaction between H2O2 and Au NRs. Different PSS concentration led to the corresponding change in localized surface plasmon resonance(LSPR) absorption peak of Au NRs. The results demonstrated that the increase of H+ concentration led to the increase of etching reaction ratio of Au NRs. The role of Br- was depicted as stabilizing gold ions during the etching process of Au NRs. PSS molecules on Au NRs inhibited the etching process. In addition, the stability of PSS-modified Au NRs had great relation with the concentration of PSS molecules. When the amounts of PSS and hexadceyl trimethyl ammonium bromide(CTAB) were the same, the zeta potential was zero. Thus, Au NRs were unstable. With increasing the amount of PSS, the surface zeta potential became negatively and the stability of Au NRs increased.

Key words: Au nanorods(Au NRs), Surface plasmon resonance, Poly(sodium-styrenesulfonate)(PSS), H2O2(Ed.: F K M)

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