Phonon properties in different types of single-walled carbon nanotube thin films probed by Raman spectroscopy

Anna Dużyńska , Michał Świniarski , Anna Wróblewska , Anna Łapińska , Klaudia Zeranska , Jarosław Judek , Mariusz Zdrojek

Abstract

Abstract We report a temperature-dependent (70–450 K) Raman study of single-walled carbon nanotube (CNT) thin films as a function of their thickness and the conductivity type of the nanotubes used to fabricate these films. The CNT films Raman G mode positions and widths exhibit two apparent regimes, a nonlinear temperature dependence at low temperatures (<270 K), which is explained by the phenomenon of optical phonon decay, and a linear temperature dependence above 270 K. The first-order temperature coefficient, determined for the linear regime, depends on the film thickness and type of CNTs, changed up to 20%. In addition, we observed another factor causing phonon shifts that is not related to the temperature but strongly depend on the film thickness and conductivity type of the CNTs. Finally, we ascertained the local temperature changes of the film samples upon laser heating as a function of the global temperature, demonstrating significant differences in the heating process, suggesting that heat evacuation efficiency depends type of the film, its thickness and global temperature. These results contribute to the understanding of the thermal properties and heat dissipation in CNT films, which are crucial for use in a variety of future applications.
Author Anna Dużyńska ZBS
Anna Dużyńska,,
- Structural Research Division
, Michał Świniarski ZBS
Michał Świniarski,,
- Structural Research Division
, Anna Wróblewska ZBS
Anna Wróblewska,,
- Structural Research Division
, Anna Łapińska ZBS
Anna Łapińska,,
- Structural Research Division
, Klaudia Zeranska ZBS
Klaudia Zeranska,,
- Structural Research Division
, Jarosław Judek ZBS
Jarosław Judek,,
- Structural Research Division
, Mariusz Zdrojek ZBS
Mariusz Zdrojek,,
- Structural Research Division
Journal seriesCarbon, ISSN 0008-6223
Issue year2016
Vol105
Pages377 - 386
Publication size in sheets0.5
DOIDOI:10.1016/j.carbon.2016.04.064
URL http://www.sciencedirect.com/science/article/pii/S0008622316303359
Languageen angielski
File
duzynskacarbon2016.pdf 3.04 MB
Score (nominal)40
ScoreMinisterial score = 40.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 6.337 (2) - 2016=6.834 (5)
Citation count*7 (2018-07-14)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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