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Electrochemistry on Tribocharged Polymers Is Governed by the Stability of Surface Charges Rather than Charging Magnitude

Date

2019

Authors

Zhang, Jinyang
Rogers, Fergus
Darwish, Nadim
Goncales, Vinicius R.
Vogel, Yan B
Wang, Fei
Gooding, J Justin
Peiris, M. Chandramalika. R.
Jia, Guohua
Veder, Jean-Pierre

Journal Title

Journal ISSN

Volume Title

Publisher

American Chemical Society

Abstract

Electrically insulating objects gain a net electrical charge when brought in and out of contact. This phenomenon—triboelectricity—involves the flow of charged species, but conclusively establishing their nature has proven extremely difficult. Here, we demonstrate an almost linear relationship between a plastic sample’s net negative charge and the amount of solution metal ions discharged to metallic particles with a coefficient of proportionality linked to its electron affinity (stability of anionic fragments). The maximum magnitude of reductive redox work is also material dependent: metallic particles grow to a larger extent over charged dielectrics that yield stable cationic fragments (smaller ionization energy). Importantly, the extent to which the sample can act as electron source greatly exceeds the net charging measured in a Faraday pail/electrometer set up, which brings direct evidence of triboeletricity being a mosaic of positive and negative charges rather than a homogeneous ensemble and defines for the first time their quantitative scope in electrochemistry.

Description

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Citation

Source

Journal of the American Chemical Society

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1021/jacs.9b00297

Restricted until

2037-12-31