A facile and low-cost length sorting of single-wall carbon nanotubes by precipitation and applications for thin-film transistors

Nanoscale
Hui GuiMing Zheng

Abstract

Semiconducting single-wall carbon nanotubes (SWCNTs) with long lengths are highly desirable for many applications such as thin-film transistors and circuits. Previously reported length sorting techniques usually require sophisticated instrumentation and are hard to scale up. In this paper, we report for the first time a general phenomenon of a length-dependent precipitation of surfactant-dispersed carbon nanotubes by polymers, salts, and their combinations. Polyelectrolytes such as polymethacrylate (PMAA) and polystyrene sulfonate (PSS) are found to be especially effective on cholate and deoxycholate dispersed SWCNTs. By adding PMAA to these nanotube dispersions in a stepwise fashion, we have achieved nanotube precipitation in a length-dependent order: first nanotubes with an average length of 650 nm, and then successively of 450 nm, 350 nm, and 250 nm. A similar effect of nanotube length sorting has also been observed for PSS. To demonstrate the utility of the length fractionation, the 650 nm-long nanotube fraction was subjected to an aqueous two-phase separation to obtain semiconducting enriched nanotubes. Thin-film transistors fabricated with the resulting semiconducting SWCNTs showed a carrier mobility up to 18 cm(2) (V s)(...Continue Reading

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Citations

Feb 1, 2017·Nanoscale Research Letters·Atsushi HiranoJunichiro Kono
Jul 27, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·A Setaro
Jun 22, 2019·Advanced Materials·Peng WangYuHuang Wang
Nov 23, 2016·Topics in Current Chemistry·Xuelei LiangLianmao Peng
Jan 14, 2017·Topics in Current Chemistry·Ming Zheng
Feb 27, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Carla Fernández-RicoRoel P A Dullens
May 4, 2021·Advanced Materials·Peng WangYuHuang Wang
Feb 11, 2020·Chemical Reviews·Feng YangYan Li

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