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Title: Direct measurement of transversely isotropic DNA nanotube by force–distance curve-based atomic force microscopy
Authors: Tabata, Osamu  kyouindb  KAKEN_id
Kim, Do-Nyun
Hirai, Yoshikazu  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0003-0835-7314 (unconfirmed)
Ma, Zhipeng
Tsuchiya, Toshiyuki  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-7846-5831 (unconfirmed)
Kim, Young-Joo
Park, Seongsu
Author's alias: 田畑, 修
Issue Date: 1-Oct-2015
Publisher: Institution of Engineering and Technology
Journal title: Micro & Nano Letters
Volume: 10
Issue: 10
Start page: 513
End page: 517
Abstract: DNA origami is one of the most promising ways to create novel two-dimensional (2D) and 3D structures, assemble inorganic and organic materials, and synthesise functional micro/nano systems. In particular, DNA origami structures consisting of nanotube configurations can function as mechanical components for encapsulating materials such as gold particles or drug proteins, due to their tubular structure, relatively high rigidity, high aspect ratio and other desirable characteristics, but certain mechanical properties such as radial rigidity have yet to be fully determined experimentally. A report is presented on the direct measurement of the radial modulus of a DNA nanotube structure by force–distance curve-based atomic force microscopy, in a magnesium ion solution. A Hertz model, corrected using the finite-element method to achieve greater realism, was employed to determine the DNA nanotube's actual radial modulus in two states, corresponding to the rigidity of a porous and electrostatically repulsive nanotube lattice, and the rigidity of a packed and elastic honeycomb lattice. Furthermore, the biphasic radial modulus was verified by estimation of the inter-helix electrostatic force and torsional rigidity of a six-helix DNA nanotube, with results comparable to those reported elsewhere. The anisotropy of the DNA nanotube honeycomb lattice revealed by the authors’ radial measurements should be useful when developing new DNA structures and may enable further applications that utilise DNA origami structures as a mechanical component.
Rights: This paper is a postprint of a paper submitted to and accepted for publication in 'Micro & Nano Letters' and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Libraryavailable at IET Digital Library.
This is not the published version. Please cite only the published version.
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/203052
DOI(Published Version): 10.1049/mnl.2015.0174
Appears in Collections:Journal Articles

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