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Significant Increase in Electrical Transport of Conducting Polymers Confined in Alumina Nanopores
- Das, Sukanya, Narayan, Kavassery Sureswaran
- Journal of physical chemistry 2019 v.123 no.17 pp. 11284-11291
- aluminum oxide, electrical conductivity, microstructure, nanopores, polymers
- We probe the electrical transport in the mixed conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as a function of confinement. The scaling of electronic conductance as a function of dimension is expected to be different from that of ionic conductance in a mixed conducting system. The role of geometry and dimensions of the confinement in the form of alumina nanopillars significantly increases the electrical conductivity of PEDOT:PSS measured both at the single nanochannel and macroscopic level. The increase in the transverse conductivity along the axis of the nanopillar is discussed in terms of a binary resistor–capacitor (RC) network. The combination of results from structural and ac transport measurements indicates rearrangement of interconnected microstructures under confinement below a characteristic length scale of ≈20 nm.