The Chain Conformation Transform of Polyaniline Nanorods Studied by Surface-Enhanced Raman Scattering

Shao-yun CHEN; Cheng-long HU; Xu-dong CHEN; Wei-hong ZHANG; Jian CHEN

doi:10.14028/j.cnki.1003-3726.2015.06.008

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The Chain Conformation Transform of Polyaniline Nanorods Studied by Surface-Enhanced Raman Scattering

更新时间：2022-09-18

- The Chain Conformation Transform of Polyaniline Nanorods Studied by Surface-Enhanced Raman Scattering
- Polymer Bulletin Vol. 28, Issue 6, Pages: 55-59(2015)
- 作者机构：
  
  1.江汉大学光电化学材料与器件省部共建教育部重点实验室，武汉　430056
  2.中山大学化学与化学工程学院，广州　510275
  3.中山大学分析测试中心，广州　510275
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2015.06.008
  CLC：
- Published：2015-06，
  
  Received：25 August 2014，
  
  Revised：24 December 2014，
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Shao-yun CHEN, Cheng-long HU, Xu-dong CHEN, Wei-hong ZHANG, Jian CHEN. The Chain Conformation Transform of Polyaniline Nanorods Studied by Surface-Enhanced Raman Scattering. [J]. Polymer Bulletin 28(6):55-59(2015)
DOI：

Shao-yun CHEN, Cheng-long HU, Xu-dong CHEN, Wei-hong ZHANG, Jian CHEN. The Chain Conformation Transform of Polyaniline Nanorods Studied by Surface-Enhanced Raman Scattering. [J]. Polymer Bulletin 28(6):55-59(2015) DOI： 10.14028/j.cnki.1003-3726.2015.06.008.

摘要

采用电化学沉积法制备了聚苯胺(Polyaniline

PANI)纳米棒、树枝状银和纳米颗粒银基体。并利用表面增强拉曼散射光谱技术(Surface-enhanced Raman Scattering

SERS)研究了 PANI纳米棒的分子链在Ag金属表面的构象变化。实验结果表明由于Ag金属表面的等离子共振效应

PANI分子中N原子的孤对电子与 Ag的自由电子产生共轭效应

使得PANI分子链上的电荷重新分布

结果C-H面内弯曲振动频率和C-C键的伸缩频率向低波数方向移动(蓝移);拉曼散射频率增强的基团在金属表面倾向垂直于分子链的主轴

拉曼散射频率减弱的基团在金属表面倾向平行于分子链主轴。

Abstract

In this paper

the interaction between Polyaniline nanorods (PANI) and Ag nanoparticle (or dendritic nanostructures) was investigated by Surface-enhanced Raman scattering ( SERS). It indicated that the molecular conformation of PANI nanorods could be changed via localized surface plasmon resonance of Ag substrate. The experimental results showed that the conjugative effect between N atoms of PANI molecule and free electrons of Ag could be induced by surface plasma resonance effect. As a result

the vibration frequency of C-H in-plane bending and C-C stretching vibration blue shifted to low wavenumber. Meanwhile

the groups onto the Ag metal surface which Raman scattering intensity increased in SERS was perpendicular to the long axis of PANI molecular

and the groups onto the Ag metal surface was parallel to the long axis of the molecules revealed by decreasing Raman scattering intensity in SERS.

关键词

聚苯胺表面增强拉曼光谱银基体构象

Keywords

Polyaniline (PANI)Surface-enhanced Raman scattering (SERS)Silver substrateConformation

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