期刊
CARBON
卷 80, 期 -, 页码 364-372出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2014.08.075
关键词
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资金
- Swiss National Science Foundation [200021-140557]
- Swiss National Science Foundation (SNF) [200021_140557] Funding Source: Swiss National Science Foundation (SNF)
Graphene-based SU8 nanocomposite is developed as a new conductive polymer, which benefits from remarkable electrical conductivity of graphene, along with photo-pattern-ability and transparency of SU8. Well defined structures with minimal resolution of 10 mu m have been successfully patterned using photolithography technique. The composite exhibits unprecedented high electrical conductivities at low filler loadings compared to other graphene-based polymer composites, owing to the effective dispersion of the graphene nanofillers in the SU8 matrix. In addition, it is shown that the conductivity data imply a vanishing percolation threshold with a large value of the transport exponent, around 6, which is inconsistent with percolation mechanism of transport. Instead, this behavior is interpreted in terms of tunneling processes between well-dispersed flexible graphene flakes. (C) 2014 Elsevier Ltd. All rights reserved.
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