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.
- Publication Date:
- Research Org.:
- Northwestern Univ., Evanston, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); 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. https://doi.org/10.1103/PhysRevLett.123.116103
Mizzi, C. A., Lin, A. Y. W., and Marks, L. D. Sun .
"Does Flexoelectricity Drive Triboelectricity?". United States. https://doi.org/10.1103/PhysRevLett.123.116103. https://www.osti.gov/servlets/purl/1594886.
@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 = {Sun Sep 01 00:00:00 EDT 2019},
month = {Sun Sep 01 00:00:00 EDT 2019}
}
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