Potassium Doped Single Wall Carbon Nanotubes: Resistance under Pressure
作者:
DmitryE. Sklovsky,
VeraA. Nalimova,
JohnE. Fischer,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 2000)
卷期:
Volume 340,
issue 1
页码: 763-768
ISSN:1058-725X
年代: 2000
DOI:10.1080/10587250008025560
出版商: Taylor & Francis Group
关键词: carbon nanotubes;transport properties;deformations;high pressure;potassium;intercalation
数据来源: Taylor
摘要:
We reportin situmeasurements of four-probe de resistance (R) of K-doped purified single wall carbon nanotube (SWNT) “buckypaper” as a function of quasi-hydrostatic pressure. Doped samples show completely different behavior compared to that of pristine nanotubes in the pressure range up to 90 kbar. The characteristic increase in the resistance of pristine buckypaper above 10 kbar, associated with the formation of kinks or/and twists of tubes, is not observed in K-doped samples. This may originate from 1) a substantial change in electronic band structure of donor intercalated nanotubes, 2) completely different transport properties of defect structures, or 3) higher stiffness of doped SWNT's which prevents formation of kinks and twists in this pressure range. On deintercalation, the pristine behavior ofR(P)is restored, establishing the reversibility of potassium vapor-transport doping.
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