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Nanoscale directional motion by angustotaxis

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Abstract

Directing motion of a nanoscale object on solid surfaces, in particular in an intrinsic way, is crucial for many aspects of nanotechnology applications. Here we report a novel intrinsic mechanism for nanoscale directional motion, termed angustotaxis, where a wide single walled carbon nanotube in a tapered channel drives itself toward the narrower end of the channel. The underlying physics of angustotaxis is attributed to the lower system potential when the nanotube is at a narrower region of the channel due to the increased contact area between the nanotube and the channel. Angustotaxis could lead to promising routes not only for nanoscale energy conversion from van der Waals potential to mechanical work, but also for mass transport like surface cleaning.

Graphical abstract: Nanoscale directional motion by angustotaxis

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Article information


Submitted
28 Nov 2019
Accepted
17 Dec 2019
First published
17 Dec 2019

Nanoscale, 2020, Advance Article
Article type
Communication

Nanoscale directional motion by angustotaxis

J. Leng, Y. Hu and T. Chang, Nanoscale, 2020, Advance Article , DOI: 10.1039/C9NR10108J

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