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Ultra-small single-walled carbon nanotubes and their superconductivity properties
Tang Z.K.; Zhang L.Y.; Wang N.; Zhang X.X.; Wang J.N.; Li G.D.; Li Z.M.; Wen G.H.; Chan C.T.; Sheng P.
2003-03-13
Source PublicationSynthetic Metals
Volume133-134
Pages689-693
AbstractUltra-small single-walled carbon nanotubes (SWNTs) are successfully fabricated in the channels of zeolite AlPO-5 (AFI) single crystals by pyrolysis of tripropylamine molecules in the channels. These nanotubes have been observed directly by transmission electron microscopy, as well as by diffuse X-ray scattering and micro-Raman measurements of the nanotube breathing mode. The data consistently indicate a nanotube diameter of as small as 0.4 nm, probably at or close to the theoretical limit. These mono-sized small nanotubes perhaps constitute the best example of one-dimensional (1-D) quantum wires. They show novel electronic properties. Investigation of the magnetic and transport properties of single-walled small diameter carbon nanotubes embedded in a zeolite matrix revealed that at temperatures below 20 K, 0.4 nm tubes exhibit superconducting behavior manifest as an anisotropic Meissner effect, with a superconducting gap and fluctuation super-current. The measured superconducting characteristics display smooth temperature variations owing to 1-D fluctuations, with a mean field superconducting transition temperature of 15 K. © 2002 Elsevier Science B.V. All rights reserved.
KeywordNanotubes Superconductivity SWNT
DOI10.1016/S0379-6779(02)00408-3
URLView the original
Language英語
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Cited Times [WOS]:17   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
CollectionUniversity of Macau
AffiliationHong Kong University of Science and Technology, William Mong Institute of Nano Science & Technology
Recommended Citation
GB/T 7714
Tang Z.K.,Zhang L.Y.,Wang N.,et al. Ultra-small single-walled carbon nanotubes and their superconductivity properties[C],2003:689-693.
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