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Electrical transpor...
Electrical transport in bundled single-wall carbon nanotubes under high pressure
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- Noël, Maxime (författare)
- Luleå tekniska universitet,Materialvetenskap
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Volkova, Y. (författare)
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Zelenovskiy, P. (författare)
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- Mases, Mattias (författare)
- Luleå tekniska universitet,Materialvetenskap
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Babushkin, A. (författare)
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- Soldatov, Alexander (författare)
- Luleå tekniska universitet,Materialvetenskap
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(creator_code:org_t)
- 2013
- 2013
- Engelska.
- Relaterad länk:
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https://ltu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- According to recent experimental data single wall carbon nanotubes (SWCNT) exhibit a sequence of phase transitions and demonstrate a high structural stability up to 35 GPa of non-hydrostatic pressure beyond which an irreversible transformation occurs. Here we report a study of electrical transport in SWCNTs at pressures up to 45 GPa in the temperature range of 300 - 400K. High pressure was generated in diamond anvil cell. The anvils are made of electrically conducting "carbonado"-type synthetic diamond. In the pressure range 10-25 GPa the CNT electrical resistance decreases considerably, whereas above 25 GPa it remains essentially unchanged. Such behaviour of the resistance can be connected to a structural modification of the SWCNTs accompanied by change of the conductivity character at high pressure. Raman spectra of the samples recovered after 30 GPa exhibit a large increase of D/G band intensity ratio. The Radial Breathing Mode part of the spectra remains essentially unaltered which testifies for structural integrity of the nanotubes after exposure to high non-hydrostatic pressure and lack of covalent interlinking between the tubes. Pressure dependences of resistance, activation energy for conductivity and charge carriers mobility were determined and discussed.
Ämnesord
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Nyckelord
- Experimentell fysik
- Experimental Physics
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)