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首页> 外文期刊>Physica, B. Condensed Matter >Effect of polyvinyl alcohol matrices on the structural and spectroscopic studies of CdSe nanoparticles
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Effect of polyvinyl alcohol matrices on the structural and spectroscopic studies of CdSe nanoparticles

机译：聚乙烯醇基体对CdSe纳米粒子结构和光谱研究的影响

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In this work, CdSe and polyvinyl alcohol (PVA)-capped CdSe nanoparticle were prepared using a one-step solution growth technique. The experimental results from transmission electron microscopy showed that the nanoparticles were well dispersed and uniform in shape with diameter of about 95 and 25 run for CdSe and PVA-capped CdSe, respectively. X-ray diffraction results showed that, the crystallinity of PVA largely decreased after capping with CdSe. The infrared absorption spectra were measured in the range (4000-200cm(-1)). The shift of the OH band toward higher frequency indicates the degradation of the hydrogen bond between the polymer chains. The change of the intensity of the carbonyl stretch band at 1700cm(-1) indicates the electrostatic interaction between CdSe and the oxygen of carbonyl group. The optical band gap was calculated from the electronic spectra and correlated with the particle size of the capped CdSe. (c) 2007 Elsevier B.V. All rights reserved.
机译：在这项工作中，使用一步溶液生长技术制备了CdSe和聚乙烯醇（PVA）封端的CdSe纳米颗粒。透射电子显微镜的实验结果表明，对于CdSe和PVA封端的CdSe，纳米粒子分散良好并且形状均匀，直径分别为约95和25nm。 X射线衍射结果表明，CdSe封端后，PVA的结晶度大大降低。在（4000-200cm（-1））范围内测量了红外吸收光谱。 OH带向较高频率的移动表明聚合物链之间氢键的降解。 1700cm（-1）处羰基拉伸带强度的变化表明CdSe与羰基氧之间的静电相互作用。根据电子光谱计算出光学带隙，并与封端的CdSe的粒径相关。 （c）2007 Elsevier B.V.保留所有权利。

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