稀土氧化物纳米粒子调制聚合物分散液晶电光特性的研究  

Study on Thulium Oxide Nanoparticles Modulating Electro-Optics Characteristics of Polymer Dispersed Liquid Crystals

作　　者：刘桂香[1] 金香[1] 吴鸿业[1] 王桂霞[2] 鲁毅[1] 

机构地区：[1]包头师范学院物理科学与技术学院,内蒙古包头014030 [2]内蒙古师范大学数学科学学院,内蒙古呼和浩特010022

出　　处：《光谱学与光谱分析》2010年第11期2911-2913,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(50862007);内蒙古自治区自然科学基金项目(20080404MS0114);内蒙古自治区高等学校科学研究资助项目(NJzc08135;NJ09141)资助

摘　　要：通过对聚合物分散液晶(PDLC)掺杂稀土氧化物纳米粒子Gd2O3,Eu2O3和Nd2O3,测试可见光范围内PDLC掺杂前后的透射率随驱动电压的变化,进而研究稀土氧化物对PDLC电光特性的调制作用。实验结果表明:掺杂Gd2O3的PDLC样品透射率在驱动电压低于10V时,随驱动电压升高而降低,当驱动电压达到为15V时,样品对光感应出现了弛豫现象,使得其透射率围绕10V时的透射率做微小的上下波动,当驱动电压达到20V时,样品透射率迅速升高,并出现了滤光现象;掺杂Eu2O3的PDLC样品透射率随驱动电压升高而下降,下降的幅度较小;掺杂Nd2O3的PDLC样品透射率随驱动电压的变化不明显。By adding the thulium oxide nanoparticles（NP）of Gd2O3 and Eu2O3 and Nd2O3 to polymer dispersed liquid crystals（PDLC）,and the transmittances of PDLC and NP-PDLC changing with voltage in visible light was tested,and the thulium oxide modulation for PDLC was studied.The results show that transmittance of Gd2O3-NP-PDLC decreases with increasing voltage when the voltage is less than 10V.The relaxation phenomenon of the sample appears at 15V,and its transmittance curve fluctuates slightly around that at 10V.The transmittance of Gd2O3-NP-PDLC increases rapidly at 20V,and its filter phenomenon emerges.And the transmittance of Eu2O3-NP-PDLC decreases with increasing voltage,but the decrease is only slight.And the transmittance of Nd2O3-NP-PDLC changes with voltage insignificantly.

关 键 词：聚合物分散液晶 稀土氧化物纳米粒子 掺杂 透射率 驱动电压 

分 类 号：O438[机械工程—光学工程]