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Optical properties of carbon nanotube-PPVcomposites: influence of the PPV conversion temperature and nanotube concentration

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Title: Optical properties of carbon nanotube-PPVcomposites: influence of the PPV conversion temperature and nanotube concentration
Authors: Mulazzi, E.1 mulazzi@omi.infu.it, Perego, R.1, Aarab, H.2, Mihut, L.2, Faulques, E.2, Lefrant, S.2, Wéry, J.2
Source: Synthetic Metals. Sep2005, Vol. 154 Issue 1-3, p221-224. 4p.
Subjects: Spectrum analysis, Nanotubes, Emission spectroscopy, Energy transfer
Abstract: Abstract: Optical absorption, photoluminescence, Raman scattering spectra of carbon nanotube-PPV composite films are studied as function of precursor conversion temperature in the range 120°C–300°C, of precursor aging and of nanotube concentrations. Dramatic changes are observed in the optical spectra at 120°C PPV conversion temperature with respect to those obtained at 300°C. It is found that the effect of the low conversion temperature on all the optical spectra is similar to that of increasing the nanotube concentration in standard PPV. In addition, from the changes in the PL spectra of the different composite films, taken at 300K and 77K, we can prove that the charge migration process between segments is the more important mechanism for the energy transfer from short to long segments. A theoretical model is also given, which is able to reproduce all the optical spectra and their changes as function of the conversion temperature and nanotube concentration in good agreement with the experimental data. [Copyright &y& Elsevier]
Copyright of Synthetic Metals is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 18284365
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Optical properties of carbon nanotube-PPVcomposites: influence of the PPV conversion temperature and nanotube concentration
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  Data: <searchLink fieldCode="AR" term="%22Mulazzi%2C+E%2E%22">Mulazzi, E.</searchLink><relatesTo>1</relatesTo><i> mulazzi@omi.infu.it</i><br /><searchLink fieldCode="AR" term="%22Perego%2C+R%2E%22">Perego, R.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Aarab%2C+H%2E%22">Aarab, H.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Mihut%2C+L%2E%22">Mihut, L.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Faulques%2C+E%2E%22">Faulques, E.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Lefrant%2C+S%2E%22">Lefrant, S.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Wéry%2C+J%2E%22">Wéry, J.</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Synthetic+Metals%22">Synthetic Metals</searchLink>. Sep2005, Vol. 154 Issue 1-3, p221-224. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Nanotubes%22">Nanotubes</searchLink><br /><searchLink fieldCode="DE" term="%22Emission+spectroscopy%22">Emission spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+transfer%22">Energy transfer</searchLink>
– Name: Abstract
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  Data: Abstract: Optical absorption, photoluminescence, Raman scattering spectra of carbon nanotube-PPV composite films are studied as function of precursor conversion temperature in the range 120°C–300°C, of precursor aging and of nanotube concentrations. Dramatic changes are observed in the optical spectra at 120°C PPV conversion temperature with respect to those obtained at 300°C. It is found that the effect of the low conversion temperature on all the optical spectra is similar to that of increasing the nanotube concentration in standard PPV. In addition, from the changes in the PL spectra of the different composite films, taken at 300K and 77K, we can prove that the charge migration process between segments is the more important mechanism for the energy transfer from short to long segments. A theoretical model is also given, which is able to reproduce all the optical spectra and their changes as function of the conversion temperature and nanotube concentration in good agreement with the experimental data. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Synthetic Metals is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.synthmet.2005.07.056
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Nanotubes
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      – SubjectFull: Emission spectroscopy
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              Text: Sep2005
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