Comparison of crystalline thin poly(vinylidene (70%)â•fitrifluoroethylene (30%)) copolymer films with short chain poly(vinylidene fluoride) films
نویسندگان
چکیده
We compare the photoemission and electron energy loss spectra of crystalline poly(vinylidene-fl uoride with trifl uoroethylene: 70%: 30%), P(VDF–TrFE), fi lms, fabricated by the Langmuir–Blodgett technique and annealed in vacuum, with in situ thermally evaporated fi lms of poly(vinylidene-fl uoride) (PVDF) in vacuum. Th e electronic structure and vibrational modes of the short chain PVDF fi lms compare well with the crystalline P(VDF–TrFE) fi lms indicating that vacuum annealed fi lms prepared ex situ are free of signifi cant surface contamination once vacuum annealed. Th e electronic structure for the short chain PVDF fi lms exhibits, however, diff erent temperature dependence than the crystalline P(VDF–TrFE) fi lms. PACS: 68.47.Mn; 71.20.Rv; 63.22.+m; 73.22.-f
منابع مشابه
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