摘要
报道了通过宏观测量偶氮聚合物光致异构效应,及其引起的光学各向异性变化,讨论了一种影响偶氮聚合物顺反异构效应的有效途径。在偶氮高分子聚合物中,添加了不同浓度的Ag纳米粒子,采用了波长为442nm的He-Cd偏振激光为激发光源,当Ag纳米粒子掺杂质量浓度为0.12μg/ml的时候,激发了薄膜样品中Ag纳米粒子的等离子体共振效应,增强了粒子周围纳米尺度的电磁场强度,相当程度上提高了偶氮聚合物光致异构的转换效率;另外,研究了不同的取代基同纳米Ag粒子的相互作用对光致异构效应的影响,探讨了一种能够有效地控制光致异构效应的方法。
The optical anisotropy caused by photo-induced isomerization of azo polymer has been investigated by experimental measurement. And a method to influence the photo-induced isomerization of azo polymer has also been reported. Silver nanoparticles with different spacing distances have been doped into the azo polymer, and the He-Cd laser with wavelength 442 nm has been used to excite the plasmon resonance effect of the silver nanoparticles. The intensity of electromagnetic field around the nano-particles has been enhanced while the mass concentration of Ag is 0.12 μg/ml and the plasmon resonance of silver nanoparticles in the thin sample is triggered. The conversion efficiency of photo-induced isomerization is also advanced greatly. In addition, we changed the mesogenic side groups of azo polymer and investigated the influence of interaction between mesogenic side groups and silver nanoparticles on the photo-induced isomerization. And a method to efficiently control the photo-induced isomerization effect has been presented.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2007年第1期119-123,共5页
Acta Optica Sinica
基金
国家自然科学基金(60377004
90201016)资助项目
关键词
材料
偶氮苯聚合物
光致异构化
AG纳米粒子
等离子体共振
materials
azobezene polymer
photo-induced isomerization
silver nanoparticle
plasmon resonance
