Strain-induced reversal of charge transfer in contact electrification

Mamadou Sow, Ross Widenor, Ajay Kumar, Seung Whan Lee, Daniel J. Lacks, R. Mohan Sankaran

Research output: Contribution to journalArticlepeer-review


We have contact! Material strain can have a dominating effect on contact electrification. When a deflated (relaxed) balloon is rubbed against teflon, the teflon surface charges positively, but when the same balloon is inflated (strained), the teflon surface charges negatively. This result illustrates that material strain can control contact electrification and alter the driving force of some (yet unknown) charge-transfer species.

Original languageEnglish (US)
Pages (from-to)2695-2697
Number of pages3
JournalAngewandte Chemie - International Edition
Issue number11
StatePublished - Mar 12 2012
Externally publishedYes


  • charge transfer
  • contact electrification
  • electrostatic interactions
  • mechanochemistry
  • strain

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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