期刊
NATURE NANOTECHNOLOGY
卷 5, 期 12, 页码 853-857出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NNANO.2010.232
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资金
- National Research Foundation of Korea (NRF) [20090090017]
- Center for Nanoscale Mechatronics Manufacturing [2009K000160]
- Ministry of Education, Science and Technology, Korea [R31-2008-000-10029-0]
- National Research Foundation of Korea [과C6A1804, 2009-0090017, 14-2008-03-001-00, R31-2008-000-10029-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Conductive films that are both stretchable and flexible could have applications in electronic devices(1,2), sensors(3,4), actuators(5) and speakers(6). A substantial amount of research has been carried out on conductive polymer composites(7), metal electrode-integrated rubber substrates(8-10) and materials based on carbon nanotubes and graphene(1,2,11-13). Here we present highly conductive, printable and stretchable hybrid composites composed of micrometre-sized silver flakes and multiwalled carbon nanotubes decorated with self-assembled silver nanoparticles. The nanotubes were used as one-dimensional, flexible and conductive scaffolds to construct effective electrical networks among the silver flakes. The nanocomposites, which included polyvinylidenefluoride copolymer, were created with a hot-rolling technique, and the maximum conductivities of the hybrid silver-nanotube composites were 5,710 S cm(-1) at 0% strain and 20 S cm(-1) at 140% strain, at which point the film ruptured. Three-dimensional percolation theory reveals that Poisson's ratio for the composite is a key parameter in determining how the conductivity changes upon stretching.
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