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A Waveguide‐Like Effect Observed in Multiwalled Carbon Nanotube Bundles
Author(s) -
Xu Shengyong,
Yang Yong,
Pei Dongfei,
Zhao Xin,
Wang Yanxin,
Sun Weiqiang,
Ma Bo,
Li Yan,
Xie Sishen,
Peng LianMao
Publication year - 2010
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201000263
Subject(s) - materials science , coaxial , bundle , nanosecond , coaxial cable , carbon nanotube , core (optical fiber) , nanotube , composite material , waveguide , optoelectronics , optics , electrical engineering , laser , conductor , physics , engineering
The delay time of nanosecond electromagnetic pulses is measured in multiwalled carbon nanotube (MWCNT) bundles and copper wires, with a length of up to 3 cm, as compared with that in standard coaxial cables of the same lengths. Under certain configurations, when the Cu core of a coaxial cable is replaced with a MWCNT bundle of the same length, the measured delay time of a pulsed signal is shortened. The difference between the delay time measured for a device with a Cu core and that of a device with a MWCNT bundle of the same length increases with the length of the samples. The results imply that, compared with Cu wires, MWCNT bundles may be more efficient in guiding the transmission of high‐frequency signals along their longitudinal axis, showing a waveguide‐like effect.