title: Helicity-dependent single-walled carbon nanotube alignment on graphite for helical angle and handedness recognition.
abstract: Aligned single-walled carbon nanotube arrays provide a great potential for the carbon-based nanodevices and circuit integration. Aligning single-walled carbon nanotubes with selected helicities and identifying their helical structures remain a daunting issue. The widely used gas-directed and surface-directed growth modes generally suffer the drawbacks of mixed and unknown helicities of the aligned single-walled carbon nanotubes. Here we develop a rational approach to anchor the single-walled carbon nanotubes on graphite surfaces, on which the orientation of each single-walled carbon nanotube sensitively depends on its helical angle and handedness. This approach can be exploited to conveniently measure both the helical angle and handedness of the single-walled carbon nanotube simultaneously at a low cost. In addition, by combining with the resonant Raman spectroscopy, the (n,m) index of anchored single-walled carbon nanotube can be further determined from the (d,θ) plot, and the assigned (n,m) values by this approach are validated by both the electronic transition energy Eii measurement and nanodevice application.
authors.affiliation: Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, Key Laboratory for Physics and Chemistry of Nanodevices, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
authors.forename: Yabin
authors.initials: Y
authors.lastname: Chen
authors.forename: Ziyong
authors.initials: Z
authors.lastname: Shen
authors.forename: Ziwei
authors.initials: Z
authors.lastname: Xu
authors.forename: Yue
authors.initials: Y
authors.lastname: Hu
authors.forename: Haitao
authors.initials: H
authors.lastname: Xu
authors.forename: Sheng
authors.initials: S
authors.lastname: Wang
authors.forename: Xiaolei
authors.initials: X
authors.lastname: Guo
authors.forename: Yanfeng
authors.initials: Y
authors.lastname: Zhang
authors.forename: Lianmao
authors.initials: L
authors.lastname: Peng
authors.forename: Feng
authors.initials: F
authors.lastname: Ding
authors.forename: Zhongfan
authors.initials: Z
authors.lastname: Liu
authors.forename: Jin
authors.initials: J
authors.lastname: Zhang
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