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题名: Elasticity measurement of DNA origami nanotube in liquid with tapping mode AFM
作者: Li LH(李龙海); Liu LQ(刘连庆); Tabata, Osamu; Li WR(李文荣)
作者部门: 机器人学研究室
会议名称: 9th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)
会议日期: APR 13-16, 2014
会议地点: Honolulu, HI
会议主办者: IEEE Nanotechnol Council, IEEE, Chinese Int NEMS Soc, City Univ Hong Kong, Univ Hawaii, Univ California, Chinese Acad Sci
会议录: 2014 9TH IEEE INTERNATIONAL CONFERENCE ON NANO/MICRO ENGINEERED AND MOLECULAR SYSTEMS (NEMS)
会议录出版者: IEEE
会议录出版地: NEW YORK
出版日期: 2014
页码: 684-687
收录类别: CPCI(ISTP)
ISBN号: 978-1-4799-4726-3
关键词: DNA origami ; DNA origami nanotube ; Young's modulus ; AFM
摘要: 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.
语种: 英语
产权排序: 1
WOS记录号: WOS:000361044400157
Citation statistics:
内容类型: 会议论文
URI标识: http://ir.sia.cn/handle/173321/16964
Appears in Collections:机器人学研究室_会议论文

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