Influence of Wettability and Geometry on Contact Electrification between Nonionic Insulators

Ignaas S. M. Jimidar*, Wojciech Kwiecinski, Gijs Roozendaal, E. Stefan Kooij, Han J. G. E. Gardeniers, Gert Desmet, Kai Sotthewes*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
71 Downloads (Pure)


Contact electrification is an interfacial process in which two surfaces exchange electrical charges when they are in contact with one another. Consequently, the surfaces may gain opposite polarity, inducing an electrostatic attraction. Therefore, this principle can be exploited to generate electricity, which has been precisely done in triboelectric nanogenerators (TENGs) over the last decades. The details of the underlying mechanisms are still ill-understood, especially the influence of relative humidity (RH). Using the colloidal probe technique, we convincingly show that water plays an important role in the charge exchange process when two distinct insulators with different wettability are contacted and separated in
Original languageEnglish
Pages (from-to)42004-42014
Number of pages11
JournalACS applied materials & interfaces
Issue number35
Early online date30 Jun 2023
Publication statusPublished - 6 Sept 2023


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