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Ionic Dopant‐Encapsulating Single‐Walled Carbon Nanotube Films with Metal‐Like Electrical Conductivity
Author(s) -
Iihara Yu,
Kawai Tsuyoshi,
oguchi Yoshiyuki
Publication year - 2020
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201901750
Subject(s) - carbon nanotube , materials science , dopant , electrical resistivity and conductivity , counterion , doping , metal , conductivity , ionic bonding , chemical engineering , nanotechnology , nanotube , electrical conductor , composite material , ion , optoelectronics , organic chemistry , chemistry , metallurgy , engineering , electrical engineering
Heavy doping is inevitable for utilizing single‐walled carbon nanotubes for wiring. However, the electrical conductivity of their films is currently as low as one tenth of the films made from typical metal pastes. Herein we report on metal‐comparable electrical conductivity from single‐walled carbon nanotube network films. We use ionic liquids and crown ether complexes for p‐type and n‐type doping, respectively. The encapsulation of counterions into carbon nanotubes promotes the conductivities in the range of 7000 S cm −1 , approximately ten times larger than those of undoped films.