Polarization anisotropy in mesoscale domains of poly(phenylene vinylene) thin films

被引：20

作者：

Wei, PK

Lin, YF

Fann, W

Lee, YZ

Chen, SA

机构：

[1] Acad Sinica, Inst Atom & Mol Sci, Taipei 10764, Taiwan

[2] Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan

[3] Natl Tsing Hwa Univ, Dept Chem Engn, Hsinchu, Taiwan

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.63.045417

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the orientational ordering in poly(phenylene vinylene) (PPV) thin films by polarization modulation near-field optical microscopy. PPV films show nonuniform mesoscale anisotropic domains. The average domain size is similar to0.3 mum, and the coefficient fur linear dichroism is similar to1.25 x 10(4) cm(-1). Both quantities are independent of film thickness up to 90 nm. The small linear dichroism as compared with the absorption coefficient indicates that polymers within domain are only partially aligned. The coefficient for linear dichroism is constant implies that there are not several domains with different polymer orientation vertically.

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页数：5

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