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Effect of deposition conditions on percolation in single‐walled carbon nanotube networks
Author(s) -
Zhang Qinghui,
Vichchulada Pornnipa,
Lay Marcus D.
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200723106
Subject(s) - carbon nanotube , percolation (cognitive psychology) , deposition (geology) , materials science , conductivity , nanotechnology , percolation theory , laminar flow , carbon fibers , chemical engineering , composite material , chemistry , composite number , thermodynamics , physics , paleontology , neuroscience , sediment , engineering , biology
Macroscopic networks of ordered single‐walled carbon nanotubes (SWNTs) have been formed using laminar‐flow deposition (LFD) at room temperature. This deposition method involves successive deposition cycles from aqueous suspensions of SWNTs. Each deposition cycle deposits a reproducible density of partially aligned SWNTs, which allows a great level of control over the network formation process. The macroscopic conductivity of these 2‐D thin‐films was observed to follow percolation theory throughout the network growth process. The ability of this deposition method to partially align SWNTs during deposition was investigated. Networks deposited with SWNTs having orthogonal directionality showed significantly greater precision and current capacity than networks composed of SWNTs that were partially aligned in only one direction.