NDLI: Elasticity measurement of DNA origami nanotube in liquid with tapping mode AFM

Content Provider	IEEE Xplore Digital Library
Author	Li, L. Liu, L. Tabata, O. Li, W.J.
Copyright Year	2014
Description	Author affiliation: Deparment of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, China (Li, W.J.) \|\| State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, China (Liu, L.) \|\| Department of Micro Engineering, Kyoto University, Kyoto, Japan (Tabata, O.) \|\| University of Chinese Academy of Sciences, Beijing, China (Li, L.)
Abstract	The elasticity of nanomaterial is extremely difficult to be obtained with traditional method due to their ultra-small scale. AFM provide a feasible way to solve this problem, but it still meets many challenges especially for the measurement of one dimensional material such as DNA origami nanotube, CNT, Silicon Nanowire and so on. In addition to the influence aroused from the sample surface effect, locating the probe exactly over the 1D material with nano-diameter is hard to achieve due to the nonlinearity of PZT actuator and the thermal drift. In this study, a new method is proposed to overcome these shortcomings. It is a physical calculation process combined with experimental measurement results to deduce the elasticity of one dimensional material. This method starts at an assumed elasticity of nanomaterials, and then experimental elasticity can be obtained based on scanned image in tapping mode. The elasticity with minimized error between assumed one and experimental one should be the true value of the materials. Since with the imaging scan method, the exactly locating the probe over the sample is not necessary. In addition, due to accurately controllable tapping force, the deformation of the nanomaterial can be controlled within a tiny scale, thus the influence from the sample surface effect can be get rid of effectively. The elasticity (pre-known) of polystyrene is measured to demonstrate the effectiveness of the proposed method. The elasticity of DNA origami is also first time obtained with the proposed method, which shows an elasticity range between 75MPa and 180 MPa. This method is simple and can be used to measure other soft nano-materials.
Starting Page	684
Ending Page	687
File Size	386507
Page Count	4
File Format	PDF
ISBN	9781479947263
DOI	10.1109/NEMS.2014.7031669
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-04-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	AFM DNA origami DNA origami nanotube Young's modulus
Content Type	Text
Resource Type	Article

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