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Molecular rotor dynamics influenced by the elastic modulus of polyethylene nanocomposites

J. Chem. Phys. 131, 171104 (2009); doi:10.1063/1.3261730

Published 5 November 2009

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Ah-Young Jee, Haneul Kwon, and Minyung Lee
Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 120-750, Republic of Korea
We observed that the excited-state twisting motion of 3,3[prime]-diethyloxacarbocyanine in polymer nanocomposites (PNCs) depends strongly on the elastic modulus of medium. PNCs consist of low density polyethylene dispersed with surface-functionalized nanodiamonds with various alkyl groups. The mechanical properties of the PNCs were measured by a nanoindentation method, and the photoisomerization processes of the cyanine dye doped in the composites were investigated by time-resolved fluorescence spectroscopy. It was found that the molecular rotor dynamics in rigid media should be quantitatively describable by the elastic modulus of polymer. ©2009 American Institute of Physics
History: Received 7 August 2009; accepted 17 October 2009; published 5 November 2009
Permalink: http://link.aip.org/link/?JCPSA6/131/171104/1
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KEYWORDS and PACS

Keywords
PACS
  • 81.40.Jj
    Elasticity and anelasticity, stress-strain relations
  • 62.20.de
    Elastic moduli of solids
  • 78.47.jd
  • 81.07.Bc
    Nanocrystalline materials: fabrication and characterization
  • YEAR: 2010

PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
Publisher:
AIP is a member of CrossRef AIP

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