IEEE-NEMS 2015 (http://www.ieee-nems.org/2015/) will be held in Xi’an, China, from 7 to 11 April 2015. This conference is focusing on advanced research areas related to MEMS, nanotechnology, and molecular technology. From Tabata Lab., 1 abstract was accepted by the technical program committee as Oral presentation. This paper is the collaboration with Seoul National Univ. The authors and title is;
Authors: Z. Ma, Y.-J. Kim, S. Park, Y. Hirai, T. Tsuchiya, D.-N. Kim, O. Tabata
Title: Direct Characterization of Radial Modulus of DNA Nanotube by AFM Nanoindentation
Abstract
DNA origami in a nanotube configuration is increasingly attractive for the creation of new structural systems that can confine or encapsulate a variety of nanoscale materials, but utilization as a functional mechanical component depends on understanding crucial properties such as the radial mechanical property that has rarely been studied. Here, we report the direct characterization of the radial modulus of a DNA nanotube by AFM nanoindentation. A corrected Hertz model was employed to interpret the measured force versus distance data. The biphasic material properties of the DNA nanotube were characterized for the first time and indicate a radial electrostatic modulus of about 10 ± 3 MPa in the small region where force was applied, and a radial elastic modulus of about 63 ± 20 MPa in a larger region.