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Title: Oriented polyvinylidene fluoride–trifluoroethylene (P(VDF–TrFE)) films by Langmuir–Blodgett deposition: A synchrotron X-ray diffraction study

Journal Article · · Physical Chemistry Chemical Physics. PCCP (Print)
DOI:https://doi.org/10.1039/c5cp04307g· OSTI ID:1227426
 [1];  [2];  [3];  [3];  [3];  [4];  [5];  [3];  [6]
  1. Iowa State Univ., Ames, IA (United States); Ames Lab., Ames, IA (United States); Massachusetts Institute of Technology, Cambridge, MA (United States)
  2. Iowa State Univ., Ames, IA (United States); Univ. of Washington, Seattle, WA (United States)
  3. Iowa State Univ., Ames, IA (United States)
  4. Iowa State Univ., Ames, IA (United States); Washington State Univ., Pullman, WA (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
  6. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
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Langmuir–Blodgett films of polyvinylidene fluoride trifluoroethylene – P(VDF–TrFE)-copolymers possess substantially improved electrocaloric and pyroelectric properties, when compared with conventionally spin-cast films. In order to rationalize this, we prepared single-layered films of P(VDF–TrFE) (70:30) using both deposition techniques. Grazing incidence wide-angle X-ray scattering (GIWAXS), reveals that Langmuir–Blodgett deposited films have a higher concentration of the ferroelectric β-phase crystals, and that these films are highly oriented with respect to the substrate. Based on these observations, we suggest alternative means of deposition, which may substantially enhance the electrocaloric effect in P(VDF–TrFE) films. As a result, this development has significant implications for the potential use of P(VDF–TrFE) in solid-state refrigeration.

Research Organization:
Ames Lab., Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
DMR-1105641; AC02-06CH11357; AC02-07CH11358
OSTI ID:
1227426
Report Number(s):
IS-J-8847; PPCPFQ
Journal Information:
Physical Chemistry Chemical Physics. PCCP (Print), Vol. 17, Issue 43; ISSN 1463-9076
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

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