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Mechanism and Kinetics of Spontaneous Nanotube Growth Driven by Screw Dislocations

Morin, Stephen A. and Bierman, Matthew J. and Tong, Jonathan and Jin, Song (2010) Mechanism and Kinetics of Spontaneous Nanotube Growth Driven by Screw Dislocations. Science, 328 (5977). pp. 476-480. ISSN 0036-8075.

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Single-crystal nanotubes are commonly observed, but their formation is often not understood. We show that nanotube growth can be driven by axial screw dislocations: Self-perpetuating growth spirals enable anisotropic growth, and the dislocation strain energy overcomes the surface energy required for creating a new inner surface forming hollow tubes spontaneously. This was demonstrated through solution-grown zinc oxide nanotubes and nanowires by controlling supersaturation using a flow reactor and confirmed using microstructural characterization. The agreement between experimental growth kinetics and those predicted from fundamental crystal growth theories confirms that the growth of these nanotubes is driven by dislocations.

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Additional Information:© 2010 American Association for the Advancement of Science. Received 7 October 2009; accepted 2 March 2010. S.J. thanks NSF (CAREER DMR-0548232), UW-Madison NSEC (NSF DMR 0425880 and 0832760), Research Corporation Cottrell Scholar Award, DuPont Young Professor Grant, and Sloan Research Fellowship for support. S.A.M. was partially supported by a 3M Graduate Research Fellowship.
Funding AgencyGrant Number
Cottrell Scholar of Research CorporationUNSPECIFIED
E. I. DuPont de Nemours and Company, Inc.UNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Issue or Number:5977
Record Number:CaltechAUTHORS:20100517-133835029
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:18328
Deposited By: Tony Diaz
Deposited On:18 May 2010 20:13
Last Modified:20 Nov 2019 22:55

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