TY - JOUR
T1 - Electrochemistry on Tribocharged Polymers Is Governed by the Stability of Surface Charges Rather than Charging Magnitude
AU - Zhang, Jinyang
AU - Rogers, Fergus J.M.
AU - Darwish, Nadim
AU - Gonçales, Vinicius R.
AU - Vogel, Yan B.
AU - Wang, Fei
AU - Gooding, J. Justin
AU - Peiris, M. Chandramalika R.
AU - Jia, Guohua
AU - Veder, Jean Pierre
AU - Coote, Michelle L.
AU - Ciampi, Simone
PY - 2019/4/10
Y1 - 2019/4/10
N2 - 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.
AB - 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.
KW - electrochemistry
KW - tribocharged polymers
KW - metal ions
KW - surface charges
KW - charging magnitude
UR - http://www.scopus.com/inward/record.url?scp=85064233028&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/ARC/DP190100735
UR - http://purl.org/au-research/grants/ARC/DE160100732
UR - http://purl.org/au-research/grants/ARC/DE160100589
UR - http://purl.org/au-research/grants/ARC/FL170100041
UR - http://purl.org/au-research/grants/ARC/CE140100012
UR - http://purl.org/au-research/grants/ARC/FL150100060
U2 - 10.1021/jacs.9b00297
DO - 10.1021/jacs.9b00297
M3 - Article
C2 - 30884944
AN - SCOPUS:85064233028
SN - 0002-7863
VL - 141
SP - 5863
EP - 5870
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 14
ER -