Electron spin resonance on carbon nanotubes–polymer composites |
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| Authors: | Mircea Chipara Jeffrey M Zaleski David Hui Chunsheng Du Ning Pan |
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| Institution: | 1. Indiana University, Department of Chemistry, Bloomington, Indiana;2. Department of Mechanical Engineering, University of New Orleans, New Orleans, Louisiana;3. Nanomaterials in the Environment, Agriculture and Technology (NEAT), University of California, Davis, California |
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| Abstract: | Electron spin resonance investigations on styrene–polyisoprene–polystyrene block copolymer loaded with various amounts of multiwalled carbon nanotubes are reported. The temperature dependence of resonance line parameters in the range 290–425 K was analyzed. It was proved that the main resonance line represents a bottleneck of localized and delocalized electrons residing on carbon nanotubes. The temperature dependence of the g-factor and double integral of resonance spectra confirmed this interpretation. The temperature dependence of the resonance linewidth of composites containing various concentrations of nanotubes was explained by the thermally activated narrowing of the resonance spectra. © 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 43: 3406–3412, 2005 |
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| Keywords: | block copolymers carbon nanotube composites electron spin resonance (ESR) nanocomposites polymer styrene–isoprene–styrene |
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