共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
含苯并噻唑偶氮发色侧基的两种非线性光学高分子 总被引:2,自引:1,他引:2
含苯并噻唑偶氮发色侧基的两种非线性光学高分子刘志红,过俊石,谢洪泉(华中理工大学化学系武汉430074)关键词苯并噻唑,聚氨酯,聚丙烯酸酯,非线性光学聚合物用于集成光学光波导电光调制器件的非线性光学聚合物要求具有大的电光系数、高透明性、良好的加工性能... 相似文献
3.
石墨烯是近年来发现的一种新型二维晶体碳材料,由单层碳原子构成,具有规则六方对称的蜂巢结构,使其表现出优异的力学、电学和光学性能,近年来迅速成为材料学及光电化学等领域研究热点。本文综述了石墨烯基光学复合材料及其光学应用的研究进展,展望了石墨烯基光复合材料的光学应用前景及发展方向。 相似文献
4.
二氧化钛表面光学特性与光催化活性的关系 总被引:105,自引:3,他引:105
本文考察了二氧化钛经氢气氛热处理后对其光催化降解苯酚活性的影响。结果DRS,FS,XRD等研究手段,发现二氧化钛光催化降解苯酚的活性与其光学特性(吸收光能力和荧光发射强度)有较好的一致性,而光学特性来自表面态。由此,提出了二氧化钛光学表面态的概念,认为与光催化活性密切相关的二氧化钛光学表面态的性质,是由这些钛羟基和低价钛的数量及比例决定的。 相似文献
5.
6.
7.
8.
9.
10.
11.
12.
Basic principles of the present optoelectronic research activities at Hoechst AG are presented in this contribution. Within the diversified broad band spectrum of optoelectronic materials and applications our interest is focused on new types of polymer optical fibers and nonlinear optical device principles using organic Langmuir–Blodgett films and electrically poled polymers. The basic principles and the limits of the present research and development activities which have a high market potential are outlined. 相似文献
13.
Optical fiber-based biosensors 总被引:1,自引:0,他引:1
This review outlines optical fiber-based biosensor research from January 2001 through September 2003 and was written to complement the previous review in this journal by Marazuela and Moreno-Bondi. Optical fiber-based biosensors combine the use of a biological recognition element with an optical fiber or optical fiber bundle. They are classified by the nature of the biological recognition element used for sensing: enzyme, antibody/antigen (immunoassay), nucleic acid, whole cell, and biomimetic, and may be used for a variety of analytes ranging from metals and chemicals to physiological materials. 相似文献
14.
15.
聚合物非线性光学材料 总被引:3,自引:0,他引:3
最近,有机非线性光学材料已引起了人们极大的兴趣。一些可极化有机分子具有很大的分子超极化率,可惜,受晶体对称性的限制仅有少数晶体具有二阶非线性光学效应。极化聚合物可以产生统计非中心对称的环境,使材料的二阶特性显示出来。本文在简单介绍了有机非线性光学和极化的原理后,综述了聚合物二阶非线性光学材料的研究进展。此外,对聚合物的三阶非线性光学效应的研究也作了介绍。 相似文献
16.
17.
Optical micromanipulation has engendered some major studies across all of the natural sciences at the mesoscopic scale. Though over thirty-five years old, the field is finding new applications and has lost none of its dynamic or innovative character: a trapped object presents a system that enables a calibrated minuscule force (piconewtons or less) to be exerted at will, enabling precision displacements right down to the angstrom level to be observed. The study of the motion of single biological molecular motors has been revolutionised and new studies in the physical sciences have been realised. From the chemistry and microfluidic viewpoint, optical forces may remotely actuate micro-components and perform micro-reactions. Overall, optical traps are becoming a key part of a wider "optical toolkit". We present a tutorial review of this technique, its fundamental principles and a flavour of some of the recent advances made. 相似文献
18.
19.
20.
G. Chiarotti 《Progress in Surface Science》1993,42(1-4):55-63
The optical techniques for detecting electronic surface states are discussed, with special reference to the earlier results that gave the first evidence of the existence of surface states in semiconductors. The results for the Si and Ge(111)2×1 reconstructed surfaces are discussed in some detail with the aim of outlining the contribution of optical measurements to the verification of the chain model of the surface. Experiments that give evidence to the polar character of the 2×1 surface are also presented. 相似文献