Direct
Synthesis of Colorful Single-Walled Carbon
Nanotube Thin Films
Version 2 2018-08-15, 21:07
Version 1 2018-07-30, 14:48
Posted on 2018-08-15 - 21:07
In
floating catalyst chemical vapor deposition (FC-CVD), tuning
chirality distribution and obtaining narrow chirality distribution
of single-walled carbon nanotubes (SWCNTs) is challenging. Herein,
by introducing various amount of CO2 in FC-CVD using CO
as a carbon source, we have succeeded in directly synthesizing SWCNT
films with tunable chirality distribution as well as tunable colors.
In particular, with 0.25 and 0.37 volume percent of CO2, the SWCNT films display green and brown colors, respectively. We
ascribed various colors to suitable diameter and narrow chirality
distribution of SWCNTs. Additionally, by optimizing reactor temperature,
we achieved much narrower (n,m)
distribution clustered around (11,9) with extremely narrow diameter
range (>98% between 1.2 and 1.5 nm). We propose that CO2 may affect CO disproportionation and nucleation modes of SWCNTs,
resulting in SWCNTs’ various diameter ranges. Our work could
provide a new route for high-yield and direct synthesis of SWCNTs
with narrow chirality distribution and offer potential applications
in electronics, such as touch sensors or transistors.
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Liao, Yongping; Jiang, Hua; Wei, Nan; Laiho, Patrik; Zhang, Qiang; Khan, Sabbir A.; et al. (2018). Direct
Synthesis of Colorful Single-Walled Carbon
Nanotube Thin Films. ACS Publications. Collection. https://doi.org/10.1021/jacs.8b05151
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AUTHORS (7)
YL
Yongping Liao
HJ
Hua Jiang
NW
Nan Wei
PL
Patrik Laiho
QZ
Qiang Zhang
SK
Sabbir A. Khan
EK
Esko I. Kauppinen