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Title: Does Flexoelectricity Drive Triboelectricity?

Abstract

The triboelectric effect, charge transfer during sliding, is well established but the thermodynamic driver is not well understood. We hypothesize here that flexoelectric potential differences induced by inhomogeneous strains at nanoscale asperities drive tribocharge separation. Modeling single asperity elastic contacts suggests that nanoscale flexoelectric potential differences of +-1–10V or larger arise during indentation and pull-off. Finally, this hypothesis agrees with several experimental observations, including bipolar charging during stick slip, inhomogeneous tribocharge patterns, charging between similar materials, and surface charge density measurements.

Authors:
ORCiD logo [1];  [1];  [1]
  1. Northwestern Univ., Evanston, IL (United States)
Publication Date:
Research Org.:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1594886
Alternate Identifier(s):
OSTI ID: 1561402
Grant/Contract Number:  
FG02-01ER45945; CMMI-1400618
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 123; Journal Issue: 11; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Mizzi, C. A., Lin, A. Y. W., and Marks, L. D. Does Flexoelectricity Drive Triboelectricity?. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.123.116103.
Mizzi, C. A., Lin, A. Y. W., & Marks, L. D. Does Flexoelectricity Drive Triboelectricity?. United States. doi:10.1103/PhysRevLett.123.116103.
Mizzi, C. A., Lin, A. Y. W., and Marks, L. D. Sun . "Does Flexoelectricity Drive Triboelectricity?". United States. doi:10.1103/PhysRevLett.123.116103.
@article{osti_1594886,
title = {Does Flexoelectricity Drive Triboelectricity?},
author = {Mizzi, C. A. and Lin, A. Y. W. and Marks, L. D.},
abstractNote = {The triboelectric effect, charge transfer during sliding, is well established but the thermodynamic driver is not well understood. We hypothesize here that flexoelectric potential differences induced by inhomogeneous strains at nanoscale asperities drive tribocharge separation. Modeling single asperity elastic contacts suggests that nanoscale flexoelectric potential differences of +-1–10V or larger arise during indentation and pull-off. Finally, this hypothesis agrees with several experimental observations, including bipolar charging during stick slip, inhomogeneous tribocharge patterns, charging between similar materials, and surface charge density measurements.},
doi = {10.1103/PhysRevLett.123.116103},
journal = {Physical Review Letters},
number = 11,
volume = 123,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
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