2009, English, Article edition: Photophysical comparative study of amylose and polyvinyle pyrrolidone / single walled carbon nanotubes complex Bonnet, P.; Nomède Martyr, N.; Bizot, H.; ...

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Bookmark: http://trove.nla.gov.au/version/205035
Physical Description
  • text
Published
  • HAL - CCSD
  • 2009
Language
  • English

Edition details

Title
  • Photophysical comparative study of amylose and polyvinyle pyrrolidone /​ single walled carbon nanotubes complex
Author
  • Bonnet, P.
  • Nomède Martyr, N.
  • Bizot, H.
  • Buisson, J- P.
  • Buleon, A.
  • Chauvet, O.
Published
  • HAL - CCSD
  • 2009
Physical Description
  • text
Subjects
Notes
  • Progressive addition of hydroxypropylated amylose (AmH), from 0.05 wt% to 4.5 wt%, to single-walled carbon nanotubes (SWNTs) in aqueous surfactant suspensions quenches the intrinsic near-Infra-Red fluorescence of semiconducting SWNTs while dispersions obtained with a same amount of polyvinylpyrrolidone (PVP) remain luminescent. Near Infra-Red emission spectroscopy (fluorescence and Raman scattering) of the samples is used to characterize the supramolecular organization of these polymer/​SWNT complex. The SWNTs are found to be wrapped by the PVP chains and not by the AmH chains which rather form AmH/​surfactant/​SWNTs complex. In PVP/​SWNTs dispersion, the fluorescence line position and intensity are affected by dielectric screening. In the case of AmH/​surfactant/​SWNTs complex, dielectric screening plays also a role but quenching occurs above about 3 wt % of AmH. We attribute the quenching to the formation of a “composite like” microstructure by opposition to stabilized dispersion.
  • HAL:hal-00371578, version 2
  • HAL:http:/​/​hal.archives-ouvertes.fr/​hal-00371578/​en/​
Language
  • English
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