Observation of high Tc one dimensional superconductivity in 4 angstrom carbon nanotube arrays
Type
ArticleKAUST Department
Advanced Membranes and Porous Materials Research CenterChemical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2017-02-14Online Publication Date
2017-02-14Print Publication Date
2017-02Permanent link to this record
http://hdl.handle.net/10754/622959
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The only known approach to fabricate large, uniform arrays of 4-Å single wall carbon nanotubes (SWNTs) is by using zeolite crystals as the template, in which the nanotubes are formed by chemical vapor deposition inside the linear channels of the AlPO-5 (AFI for short) zeolite. However, up to now the pore filling factor has been very low, as evidenced by the weight percentage of carbon in thermal gravimetric analysis (TGA) measurements. In this work, we show that by using a new, micro-platelet AFI crystals as the template, combined with the use of a new CVD process, we can increase the TGA result to 22.5wt%, which translates to a pore filling factor of 91%. We have observed one dimensional (1D) superconductivity in such samples. The temperature dependence of resistance shows a smooth decreasing trend below 60 K, and the differential resistance displays a gap that disappears above the 1D superconducting initiation temperature. The observed behaviour is shown to agree very well with the theoretical predictions of 1D superconductivity.Citation
Zhang B, Liu Y, Chen Q, Lai Z, Sheng P (2017) Observation of high Tc one dimensional superconductivity in 4 angstrom carbon nanotube arrays. AIP Advances 7: 025305. Available: http://dx.doi.org/10.1063/1.4976847.Sponsors
This work has been supported by the Research Grants Council of Hong Kong, Grants HKUST9/CRF/08 and RGC 16304314.Publisher
AIP PublishingJournal
AIP AdvancesAdditional Links
http://aip.scitation.org/doi/10.1063/1.4976847ae974a485f413a2113503eed53cd6c53
10.1063/1.4976847
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