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Title: Enhancement of Local Piezoresponse in Polymer Ferroelectrics via Nanoscale Control of Microstructure

Journal Article · · ACS Nano
DOI:https://doi.org/10.1021/nn5067232· OSTI ID:1172270
 [1];  [2];  [1];  [3];  [4];  [3];  [5];  [6];  [2];  [2];  [1]
  1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
  2. Department of Physics and Astronomy, Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, United States
  3. Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
  4. School of Materials Science and Engineering, Xiangtan University, Hunan 411105, People’s Republic of China
  5. X-ray Sciences Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
  6. Department of Mechanical Engineering, University of Washington, Seattle, Washington 98195, United States

Polymer ferroelectrics are flexible and lightweight electromechanical materials that are widely studied due to their potential application as sensors, actuators, and energy harvesters. However, one of the biggest challenges is their low piezoelectric coefficient. Here, we report a mechanical annealing effect based on local pressure induced by a nanoscale tip that enhances the local piezoresponse. This process can control the nanoscale material properties over a microscale area at room temperature. We attribute this improvement to the formation and growth of beta-phase extended chain crystals via sliding diffusion and crystal alignment along the scan axis under high mechanical stress. We believe that this technique can be useful for local enhancement of piezoresponse in ferroelectric polymer thin films.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
LDRD FY2014-063-R1; User Facilities under Contract DE-AC02-06CH11357; AC02-06CH11357
OSTI ID:
1172270
Alternate ID(s):
OSTI ID: 1357171
Journal Information:
ACS Nano, Journal Name: ACS Nano Vol. 9 Journal Issue: 2; ISSN 1936-0851
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 56 works
Citation information provided by
Web of Science

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