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Title: Vertically aligned P(VDF-TrFE) core-shell structures on flexible pillar arrays

PVDF and P(VDF-TrFE) nano- and micro- structures are widely used due to their potential applications in several fields, including sensors, actuators, vital sign transducers, and energy harvesters. In this study, we developed vertically aligned P(VDF-TrFE) core-shell structures using high modulus polyurethane acrylate (PUA) pillars as the support structure to maintain the structural integrity. In addition, we were able to improve the piezoelectric effect by 1.85 times from 40 ± 2 to 74 ± 2 pm/V when compared to the thin film counterpart, which contributes to the more efficient current generation under a given stress, by making an effective use of the P(VDF-TrFE) thin top layer as well as the side walls. We attribute the enhancement of piezoelectric effects to the contributions from the shell component and the strain confinement effect, which was supported by our modeling results. We envision that these organic-based P(VDF-TrFE) core-shell structures will be used widely as 3D sensors and power generators because they are optimized for current generations by utilizing all surface areas, including the side walls of core-shell structures.
 [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [3] ;  [1] ;  [2] ;  [3]
  1. Korea Advanced Inst. Science and Technology (KAIST), Daejeon (Korea, Republic of). Department of Materials Science and Engineering; Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Korea Advanced Inst. Science and Technology (KAIST), Daejeon (Korea, Republic of). Graduate School of Energy Environment Water Sustainability
  3. Korea Advanced Inst. Science and Technology (KAIST), Daejeon (Korea, Republic of). Department of Materials Science and Engineering
  4. Argonne National Lab. (ANL), Lemont, IL (United States). Nuclear Engineering Division
Publication Date:
OSTI Identifier:
Grant/Contract Number:
AC02-06CH11357; 2010-0015063; 2011K000674; 20103020060010; 2014R1A4A1003712; SC1100
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal ID: ISSN 2045-2322
Nature Publishing Group
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
National Research Foundation of Korea (NRF); USDOE Office of Science (SC)
Country of Publication:
United States
30 DIRECT ENERGY CONVERSION; 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; P(VDF - TrFE); Piezoelectric polymers; energy generation; in - situ electromechanical characterization; vertically aligned core - shell structures