Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 144, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4949759
Keywords
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Funding
- Advanced Research Center for Nuclear Excellence - MEST, Korea
- KISTI [KSC-2014-C3-002]
- Ministry of Education, Science and Technology [2012M3C1A6035363]
- Chonnam National University
- National Research Foundation of Korea [2012M3C1A6035363, 22A20130012547, 2011-0031932] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We investigate how the electrical conductance of microfibers (made of polymers and conductive nanofillers) decreases upon uniaxial deformation by performing both experiments and simulations. Even though various elastic conductors have been developed due to promising applications for deformable electronic devices, the mechanism at a molecular level for electrical conductance change has remained elusive. Previous studies proposed that the decrease in electrical conductance would result from changes in either distances or contact numbers between conductive fillers. In this work, we prepare microfibers of single walled carbon nanotubes (SWCNTs)/polyvinyl alcohol composites and investigate the electrical conductance and the orientation of SWCNTs upon uniaxial deformation. We also perform extensive Monte Carlo simulations, which reproduce experimental results for the relative decrease in conductance and the SWCNTs orientation. We investigate the electrical networks of SWCNTs in microfibers and find that the decrease in the electrical conductance upon uniaxial deformation should be attributed to a subtle change in the topological structure of the electrical network. Published by AIP Publishing.
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