Self-Assembly of Semiconducting Single-Walled Carbon Nanotubes into Dense, Aligned Rafts

Justin Wu; Liying Jiao; Alexander Antaris; Charina L. Choi; Liming Xie; Yingpeng Wu; Shuo Diao; Changxin Chen; Yongsheng Chen; Hongjie Dai

doi:10.1002/smll.201301547

arXiv · 1307.3565

Self-Assembly of Semiconducting Single-Walled Carbon Nanotubes into Dense, Aligned Rafts

Justin Wu·Liying Jiao·Alexander Antaris·Charina L. Choi·Liming Xie·Yingpeng Wu·Shuo Diao·Changxin Chen·Yongsheng Chen·Hongjie Dai

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Abstract

Single-walled carbon nanotubes are promising nanoelectronic materials but face long-standing challenges including production of pure semiconducting SWNTs and integration into ordered structures. Here, highly pure semiconducting single-walled carbon nanotubes are separated from bulk materials and self-assembled into densely aligned rafts driven by depletion attraction forces. Microscopy and spectroscopy revealed a high degree of alignment and a high packing density of ~100 tubes/micron within SWNT rafts. Field-effect transistors made from aligned SWNT rafts afforded short channel (~150 nm long) devices comprised of tens of purely semiconducting SWNTs derived from chemical separation within a < 1 micron channel width, achieving unprecedented high on-currents (up to ~120 microamperes per device) with high on/off ratios. The average on-current was ~ 3-4 microamperes per tube. The results demonstrated densely aligned high quality semiconducting SWNTs for integration into high performance nanoelectronics.

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Justin Wu, Liying Jiao, Alexander Antaris, Charina L. Choi, Liming Xie, Yingpeng Wu, Shuo Diao, Changxin Chen, Yongsheng Chen, Hongjie Dai. 2013-07-12. Self-Assembly of Semiconducting Single-Walled Carbon Nanotubes into Dense, Aligned Rafts. https://doi.org/10.1002/smll.201301547

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