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Title: Optical properties of ferroelectric nanocrystal-containing polymer BaTiO₃/polycarbonate films
Authors: Liu, W. C.
Li, A. D.
Tan, J.
Mak, Chee-leung
Wong, Kin-hung
Wu, D.
Ming, Naiben
Subjects: Ferroelectric materials
Nanostructured materials
Polymer films
Composite materials
Barium compounds
Spin coating
X-ray diffraction
Transmission electron microscopy
Dielectric polarisation
Electro-optical effects
Issue Date: 15-Jul-2005
Publisher: American Institute of Physics
Source: Journal of applied physics, 15 July 2005, v. 98, no. 2, 024112, p. 1-5.
Abstract: BaTiO₃(BT)-nanocrystal-doped polycarbonate polymer composite thin films (BT/PC) with different BT concentrations were prepared by spin-coating method. Ultrafine BT (~40–50 nm) nanocrystals with pure perovskite tetragonal phase were synthesized by hydrothermal method. The structure of BT nanocrystals and composite films were studied by means of x-ray diffraction and transmission scanning microscopy. The composite films were poled with a high electric field at a suitable temperature to yield a noncentrosymmetric arrangement and produce better electro-optic properties. The poling condition under external electric field was optimized through the dielectric properties of BT and PC polymer and the effective-field intensity theory. The electro-optic (EO) coefficients and transmittance of composite films with various BT concentrations were also evaluated. The average effective linear EO coefficient and figure of merit of 20-wt % BT-doped composite films were about 63.1 and 103.1 pm/V, respectively. BT/PC composite films show excellent electro-optic properties for application in integrated optoelectronics and optics.
Rights: © 2005 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in W. C. Liu et al., J. Appl. Phys. 98, 024112 (2005) and may be found at
Type: Journal/Magazine Article
DOI: 10.1063/1.1984076
ISSN: 0021-8979 (print)
1089-7550 (online)
Appears in Collections:MRC Journal/Magazine Articles
AP Journal/Magazine Articles

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