Comparison of crystalline thin poly(vinylidene (70%)–trifluoroethylene (30%)) copolymer films with short chain poly(vinylidene fluoride) films

Authors

Jaewu Choi, Wayne State UniversityFollow
Eizi Morikawa, Louisiana State UniversityFollow
Stephen Ducharme, University of Nebraska-LincolnFollow
Peter A. Dowben, University of Nebraska-LincolnFollow

Date of this Version

7-21-2005

Comments

Published in Materials Letters 59 (2005), pp. 3599–3603. ISSN 0167-577X © 2005 Elsevier B.V. All rights reserved. Used by permission. doi:10.1016/j.matlet.2005.06.048 http://www.sciencedirect.com http://www.elsevier.com/locate/matlet

Abstract

We compare the photoemission and electron energy loss spectra of crystalline poly(vinylidene-fluoride with trifluoroethylene: 70%: 30%), P(VDF–TrFE), films, fabricated by the Langmuir–Blodgett technique and annealed in vacuum, with in situ thermally evaporated films of poly(vinylidene-fluoride) (PVDF) in vacuum. The electronic structure and vibrational modes of the short chain PVDF films compare well with the crystalline P(VDF–TrFE) films indicating that vacuum annealed films prepared ex situ are free of significant surface contamination once vacuum annealed. The electronic structure for the short chain PVDF films exhibits, however, different temperature dependence than the crystalline P(VDF–TrFE) films. PACS: 68.47.Mn; 71.20.Rv; 63.22.+m; 73.22.-f