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Polarized Raman stu...
Polarized Raman study of aligned multiwalled carbon nanotubes arrays under high pressure
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Yang, Xigui (författare)
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Yao, Mingguang (författare)
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Lu, Weibang (författare)
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Chen, Shuanglong (författare)
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Du, Mingrun (författare)
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Zhu, Luyao (författare)
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Li, Haiyan (författare)
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Liu, Ran (författare)
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Cui, Tian (författare)
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- Sundqvist, Bertil (författare)
- Umeå universitet,Institutionen för fysik,State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P. R. China
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Liu, Bingbing (författare)
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(creator_code:org_t)
- 2015-11-23
- 2015
- Engelska.
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Ingår i: The Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 119:49, s. 27759-27767
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Tuning the intertube interaction and the topological structure of carbon nanotubes by the application of pressure may obviously affect their properties such as optical and electronic properties. However, characterizing such changes is still challenging. Here, we performed polarized Raman scattering studies on aligned multiwalled carbon nanotube arrays (MWNTAs). Unlike researchers from the previous literature, we found that the MWNTAs exhibit a polarization dependence similar to that of isolated single walled carbon nanotubes at ambient conditions. Upon compression, the polarization dependence weakens gradually with increasing pressure up to ∼20 GPa, which has been discussed in terms of pressure-induced enhancement of intertube interactions. At around 20 GPa, the depolarization effect vanishes, which can be explained by the formation of interlinked sp3 bonding in the MWNTAs. Our results show that polarized Raman spectroscopy is an efficient method to explore not only intertube interaction but also structural transition changes in MWNTs, which overcome the difficulty that MWNTs have no obvious fingerprints like those of single-walled carbon nanotubes in the study of structural transformations.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Carbon nanotubes
- carbon nanotube arrays
- intertube interaction
- high pressure
- polarized Raman scattering
- fysik
- Physics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Yang, Xigui
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Yao, Mingguang
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Lu, Weibang
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Chen, Shuanglong
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Du, Mingrun
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Zhu, Luyao
-
visa fler...
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Li, Haiyan
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Liu, Ran
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Cui, Tian
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Sundqvist, Berti ...
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Liu, Bingbing
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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The Journal of P ...
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Umeå universitet