Effect of nanoparticle composition on the performance of photorefractive polymers

被引：15
作者：
Aslam, F. [1 ]
Stevenson-Hill, J.
Binks, D. J.
Daniels, S.
Pickett, N. L.
O'Brien, P.
机构：
[1] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England
[2] Univ Manchester, Sch Chem, Manchester M13 9PL, Lancs, England
来源：
CHEMICAL PHYSICS | 2007年 / 334卷 / 1-3期
关键词：
photorefractive polymers; nanoparticles;
D O I：
10.1016/j.chemphys.2007.02.011
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A photorefractive polymer composite has been sensitized by three different types of CdSe/ZnS core/shell nanoparticles, which are of similar sizes and nominally of the same composition but different in detail. The composites comprise the nanoparticles, poly(N-vinylcarbazole) and the electro-optic chromophore 1-(2-ethylhexyloxy)-2,5-dimethyl-4-(4nitrophenylazo) benzene. The nanoparticles are characterized by elemental analysis, absorption and photoluminescence spectroscopy, transmission electron microscopy and powder X-ray diffraction. The electro-optic response of the composites is measured by transmission ellipsometry, photo refractivity is confirmed by two-beam coupling, and photorefractive performance is determined by degenerate four wave mixing. The results indicate that, even for ostensibly similar nanoparticles, small differences in composition have a significant effect on the photorefractive performance. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：45 / 52
页数：8
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