摘要
掺杂种类和掺杂量的不同可使聚苯胺的光学性质发生很大的变化．利用盐酸挥发的HCl气体对聚苯胺自支持薄膜进行了掺杂，并测量了不同掺杂浓度的薄膜在不同入射角下的红外反射谱（4000cm-1～400cm-1）．结果表明：掺杂使干涉程度明显减弱、干涉峰向长波方向移动、反射率先上升后下降，而且不同入射角反射谱的相对强度也会有一定程度的改变．通过实测数据分析与计算机模拟对比证明：在低掺杂浓度时，随着掺杂程度的提高，消光系数上升较快，当掺杂浓度较高时，消光系数上升缓慢；在整个掺杂过程中，折射率基本保持一个较慢的上升趋势．
Optical property of polyaniline may be greatly changed by doping materials and concentra- tions. In our work, polyaniline free-standing films were doped by hydrogen chloride gas volatilized from hydrochloric acid. Infrared reflectance spectrum（4 000 cm-1-400 cm-1） of the films with dif- ferent doping concentration was recorded under different angle of incidence. The results show that dopant will greatly reduce the interference intensity. The interference peaks move to the direction of the longer wavelength. With increasing doping concentration, the reflectivity increases at first, then decreases. Ratio of reflectivities with different angle of incidence also changed. The measured data were compared with the calculated ones. It is found that at low doping, the extinction coefficient in- creases rapidly with the increasing doping concentration. As the doping is further increased, the in- creasing gets slower. While the refractive index slowly increases with increasing doping concentration in the whole range.
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2011年第6期107-111,共5页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家杰出青年基金资助项目(60825407)
国家自然科学基金资助项目(60877025
61077044
50902008)
国家"973"重点基础研究发展计划项目资助(2011CB932700
2011CB932703)
北京市科学技术委员会项目资助(Z08000303220803
Z101103055810003
Z090803044009001)
北京市自然科学基金资助项目(2092024)
北京多部委共建项目
"光电成像技术与系统教育部重点实验室"开放基金资助
关键词
聚苯胺
掺杂
折射率
消光系数
反射谱
polyaniline
dopant
refractive index
extinction coefficient
reflectance spectrum
