Abstract:
UNLABELLED:Understanding the mechanism of the strain-dependent conductivity change in polymers in stretched conditions is important. We observed a strain-induced growth of the conductive regions of PEDOT:PSS films, induced by a coalescence of conductive PEDOT-rich cores. This growth due to coalescence leads to a gradual decrease in the electrical resistivity up to 95%, independent of the thickness of the PEDOT:PSS films. The primary mechanism for the evolution of the PEDOT-rich cores proceeds by the cores growing larger as they consuming relatively smaller cores. This process is caused by a strain-induced local rearrangement of PEDOT segments in the vicinity of PSS shells around the cores and also changes the chemical environment in PEDOT, induced by the electron-withdrawing effects around the PEDOT chains. The strain-induced growth mechanism is beneficial to understanding the phenomenon of polymeric chain rearrangement in mechanical deformation and to modulating the electrical conductivity for practical applications.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Lee YY,Choi GM,Lim SM,Cho JY,Choi IS,Nam KT,Joo YCdoi
10.1038/srep25332subject
Has Abstractpub_date
2016-04-29 00:00:00pages
25332issn
2045-2322pii
srep25332journal_volume
6pub_type
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