酸碱度对金纳米结构形貌的调控及其机理研究

doi:10.7517/j.issn.1674-0475.2011.03.203

影像科学与光化学 ›› 2011, Vol. 29 ›› Issue (3): 203-211.DOI: 10.7517/j.issn.1674-0475.2011.03.203

酸碱度对金纳米结构形貌的调控及其机理研究

王维康^1,2, 郑美玲¹, 赵震声¹, 段宣明¹

1. 中国科学院理化技术研究所, 北京100190;
2. 中国科学院研究生院, 北京100049

收稿日期:2011-02-21 修回日期:2011-04-13 出版日期:2011-05-23 发布日期:2011-05-23
通讯作者: 段宣明,研究员,E-mail:xmduan@mail.ipc.ac.cn.
基金资助:
国家自然科学基金资助项目(50773091,50973126,61077028);国家重点基础研究发展规划973项目(2010CB934103)

The Preparation and Mechanism of Microscale Gold Structures on the Polymer with Different pH

WANG Wei-kang^1,2, ZHENG Mei-ling¹, ZHAO Zhen-sheng¹, DUAN Xuan-ming¹

1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Received:2011-02-21 Revised:2011-04-13 Online:2011-05-23 Published:2011-05-23

摘要/Abstract

摘要： 本文通过调节环境pH酸碱度改变聚电解质膜中氨基基团的键合状态,以控制聚电解质膜表面金纳米粒子的原位还原与自组装过程中的聚集行为,发现当聚电解质膜经pH为5.40的去离子水处理后可在其表面制备出片状金纳米结构;经pH为0.65的强酸溶液处理后,可在膜表面制备出树枝状的金纳米结构,且尺寸比pH为5.40条件下增大一倍;经pH为12.77的强碱溶液处理后,金纳米粒子的聚集状态发生改变,形成了球形纳米结构;对金纳米粒子形貌的调控机理进行了初步探讨.

关键词: 金纳米粒子, 原位生成, 自组装, 纳米结构, 形貌调控, pH酸碱度

Abstract: We present a simple in situ synthesis method for preparing gold nanoparticles(Au NPs),in which the Au NPs self-aggregate into different microscale structures on a polyelectrolyte film(PEF) surface.In this approach,the aggregation behavior of Au NPs has been controlled by tuning the pH of the PEF,resulting in the different binding regime of the amine group.The round platelet gold structure has been observed on the surface of PEF with pH of 5.40.The size of the dendritic structure obtained on the surface of acidic PEF with pH of 0.65 is twice larger than that of the pH 5.40 PEF.In addition,the morphology of the gold structures changed into spheres when the pH changed from 5.40 to 12.77.Furthermore,the controlling mechanism of PEF has also been discussed.

Key words: gold nanoparticles, in situ synthesis, self-assembly, nanostructure, morphology optimization, pH

中图分类号:

王维康, 郑美玲, 赵震声, 段宣明. 酸碱度对金纳米结构形貌的调控及其机理研究[J]. 影像科学与光化学, 2011, 29(3): 203-211.

WANG Wei-kang, ZHENG Mei-ling, ZHAO Zhen-sheng, DUAN Xuan-ming. The Preparation and Mechanism of Microscale Gold Structures on the Polymer with Different pH[J]. Imaging Science and Photochemistry, 2011, 29(3): 203-211.

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酸碱度对金纳米结构形貌的调控及其机理研究

The Preparation and Mechanism of Microscale Gold Structures on the Polymer with Different pH

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