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Photomechanical effects in a dye-doped polymer nanocomposite

Title
Photomechanical effects in a dye-doped polymer nanocomposite
Authors
Jee A.-Y.Lee M.
Ewha Authors
이민영
SCOPUS Author ID
이민영scopus
Issue Date
2011
Journal Title
Journal of Nanoscience and Nanotechnology
ISSN
1533-4880JCR Link
Citation
vol. 11, no. 7, pp. 6459 - 6462
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Nile Red (NR) has been widely used as a microenvironmental probe since its luminescence characteristics depend strongly on medium polarity viscosity and hydrophobicity The driving source for the internal motion of NR in rigid media is an absorbed photon that induces the molecule to rotate internally causing the matrix deformed. Reversible (elastic) deformation and irreversible (plastic) deformation will influence the twisting dynamics in a different manner. In this work, we have investigated its excited state motion in a polymer nanocomposite, wherein polyvinyl alcohol (PVA) and nanodiamonds (NDs) were used as a matrix and a filler, respectively. PVA is a hydrophilic polymer having good chemical resistance, processability and gel formation ability. Nanodiamond is a good candidate as a nanofiller for polymer composites. The elastic modulus of the polymer nanocomposite was measured by atomic force mi i ,croscopy (AFM) nanoindentation and the emission lifetime of NR embedded in the polymer nanocomposite by time-resolved emission spectroscopy. Our results show that the fluorescence lifetime of NR is correlated well to the elastic modulus of polymer nanocomposite. Copyright © 2011 American Scientific Publishers All rights reserved.
DOI
10.1166/jnn.2011.4435
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자연과학대학 > 화학·나노과학전공 > Journal papers
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