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基于扫描电子显微镜的碳纳米管拾取操作方法研究

杨权 马立 杨斌 丁汇洋 陈涛 杨湛 孙立宁 福田敏男

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基于扫描电子显微镜的碳纳米管拾取操作方法研究

杨权, 马立, 杨斌, 丁汇洋, 陈涛, 杨湛, 孙立宁, 福田敏男

Method of picking up carbon nanotubes inside scanning electron microscope

Yang Quan, Ma Li, Yang Bin, Ding Hui-Yang, Chen Tao, Yang Zhan, Sun Li-Ning, Toshio Fukuda
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  • 碳纳米管场效应管是未来纳米器件的发展方向,而制造纳米器件的前提是拾取碳纳米管,基于扫描电子显微镜(SEM)的微纳机器人操作系统能够实现碳纳米管拾取操作.本文建立拾取操作中碳纳米管与原子力显微镜(AFM)探针间范德瓦耳斯力力学模型,不同接触状态下范德瓦耳斯力越大越有利于拾取碳纳米管.在SEM视觉反馈图像中建立相对坐标系,首先提出倾角变值方法检测碳纳米管与AFM探针的接触状态,然后运用动态差值方法识别碳纳米管与AFM探针空间位姿并校正碳纳米管位姿,最后自下而上拾取碳纳米管.实验结果表明:拟合直线倾角变值较大时碳纳米管与AFM探针发生接触,动态差值变化为零时碳纳米管与AFM探针为空间线接触,在完全线接触模型下选择合适的接触角度、接触长度和拾取速度能够成功拾取碳纳米管.
    In this paper a promising method of recognizing spatial contact state between carbon nanotubes (CNTs) and atomic force microscope (AFM) probe inside scanning electron microscope (SEM) is proposed. The CNTs can be picked up simply and effectively by van der Waals force without knowing depth information of SEM images by using this method. And a micro-nanorobotic manipulation system with 16 DOFs, which allows the automatic pick-up of CNTs based on visual feedback, is presented. The micro-nanorobotic manipulators are assembled into 4 units with 4 DOFs individually. Namely, a manipulator has 4 DOFs i.e., three linear motions and a rotational motion. Manipulators are actuated by picomotors with better than 30 nm linear resolution and less than 1 micro-rad rotary resolution. The van der Waals force mechanics model between CNTs and AFM probe in the picking up manuplation is established. In reality, the van der Waals force is the main attractive force under the vacuum condition inside SEM when the influence of staticelectricity is ignored. It is shown that the van der Waals force under horizontal (sphere-plane) contact model is significantly larger with appropriate overlapping length. Though the positions in both x and y directions of the CNTs and AFM cantilever are acquired, the relative positions of those two objects in the z direction remain unclear. In the gradually ascending process of AFM cantilever to contact the CNTs, the CNTs abruptly drop on the surface of AFM probe due to the van der Waals force. According to the relative coordinate system of SEM visual feedback images, the detection of contact state between carbon nanotubes and AFM probe are completed by using the inclination changing value of fitting line. The experimental results suggest that the abrupt contact between CNTs and AFM probe happens when the inclination changing value of the regression line is found to be 3.0263. The spatial contact state between carbon nanotubes and AFM probe includes line contact (Model a) and point contact (Model b, Model c). Then the dynamic difference method is introduced to identify the spatial contact model of CNTs and AFM probe. The results demonstrate that contact model of CNTs and AFM probe is line contact when the dynamic difference is approximately zero. The position of carbon nanotubes is corrected by moving AFM cantilever automatically underneath the CNTs. The picking-up of CNTs from substrate under line contact model is completed by choosing the optimum contact angle, contact length and pickup speed.
      通信作者: 马立, malian@shu.edu.cn;chent@suda.edu.cn ; 陈涛, malian@shu.edu.cn;chent@suda.edu.cn
    • 基金项目: 国家自然科学基金(批准号:61573238,61433010)资助的课题.
      Corresponding author: Ma Li, malian@shu.edu.cn;chent@suda.edu.cn ; Chen Tao, malian@shu.edu.cn;chent@suda.edu.cn
    • Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 61573238, 61433010).
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    Yu N, Nakajima M, Shi Q, Yang Z, Wang H P, Sun L N, Huang Q, Fukuda T 2017 Scanning 1 5910734

  • [1]

    Iijima S 1991 Nature 354 56

    [2]

    Fukuda T, Arai F, Dong L X 2003 Proc. IEEE 91 1803

    [3]

    Li P J, Zhang W J, Zhang Q F, Wu J L 2007 Acta Phys. Sin. 56 1054 (in Chinese) [李萍剑, 张文静, 张琦峰, 吴锦雷 2007 物理学报 56 1054]

    [4]

    Chau R, Datta S, Doczy M, Doyle B, Jin B, Kavalieros J, Majumdar A, Metz M, Radosavljevic M 2005 IEEE Trans. Nanotechnol. 4 153

    [5]

    Tulevski G S, Franklin A D, Frank D, Lobez J M, Cao Q, Park H, Afzali A, Han S J, Hannon J B, Haensch W 2014 ACS Nano 8 8730

    [6]

    Liu X H, Zhao H L, Li T Y, Zhang R, Li S J, Ge C H 2013 Acta Phys. Sin. 62 147308 (in Chinese) [刘兴辉, 赵宏亮, 李天宇, 张仁, 李松杰, 葛春华 2013 物理学报 62 147308]

    [7]

    Fukuda T, Arai F, Dong L X 2008 Int. J. Adv. Robot. Syst. 2 264

    [8]

    Fatikow S, Eichhorn V, Stolle C, Siever S T, Jhnisch M 2008 Mechatronics 18 370

    [9]

    Ru C H, Zhang Y, Sun Y, Zhong Y, Sun X L, Hoyle D, Cotton I 2011 IEEE Trans. Nanotechnol. 10 674

    [10]

    Li G Y, Xi N, Yu M M, Fung W K 2004 IEEE Asem. T. Mech. 9 358

    [11]

    Li G Y, Xi N, Chen H P, Pomeroy C, Prokos M 2005 IEEE Trans. Nanotechnol. 4 605

    [12]

    Yang Z, Chen T, Wang Y Q, Sun L N, Fukuda T 2016 Micro. Nano. Lett. 11 645

    [13]

    Jhnisch M, Schiffner M 2006 Proceedings International Conference Robotics Automatio Orlando FL, United States, May 15-19, 2006 p908

    [14]

    Eichhorn V, Fatikow S, Wich T, Dahmen C, Sievers T, Andersen K N, Carlson K, Bggild P 2008 J. Micro. Nano. Mech. 4 27

    [15]

    Fatikow S, Eichhorn V, Wich T 2007 Proceedings IEEE International Conference Mechatronics Autom Harbin, China, August 5-8, 2007 p45

    [16]

    Wang Y Q, Cao J J, Yang Z, Chen T, Sun L N, Fukuda T 2016 International Conference Advanced Robotics and Mechatronics Albert, Canada, July 12-15, 2016 p288

    [17]

    Yang Z, Wang Y Q, Yang B, Li G H, Chen T, Nakajima M, Sun L N, Fukuda T 2016 Sensors 16 1479

    [18]

    Shi Q, Yang Z, Guo Y N, Wang H P, Sun L N, Huang Q, Fukuda T 2017 IEEE Asem. T. Mech. 22 845

    [19]

    Guo H G 2011 IEEE Signal Proc. Mag. 5 134

    [20]

    Jiang F, Liu S L 2018 J. Phys. D: Appl. Phys. 12 125002

    [21]

    Wang Y Q, Yang Z, Chen T, Lijun Yang, Sun L N, Fukuda T 2016 Proceedings of the 11th IEEE Annual InternationalConference on Nano/Micro Engineered and Molecular Systems (NEMS) Matsushima Bay and Sendai MEMS City, Japan, April 17-20, 2016 p111

    [22]

    Ding H Y, Shi C Y, Ma L, Yang Z, Wang M Y, Wang Y Q, Chen T, Sun L N, Fukuda T 2018 Sensors 18 1137

    [23]

    Yu N, Nakajima M, Shi Q, Yang Z, Wang H P, Sun L N, Huang Q, Fukuda T 2017 Scanning 1 5910734

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出版历程
  • 收稿日期:  2018-02-23
  • 修回日期:  2018-04-19
  • 刊出日期:  2018-07-05

基于扫描电子显微镜的碳纳米管拾取操作方法研究

    基金项目: 国家自然科学基金(批准号:61573238,61433010)资助的课题.

摘要: 碳纳米管场效应管是未来纳米器件的发展方向,而制造纳米器件的前提是拾取碳纳米管,基于扫描电子显微镜(SEM)的微纳机器人操作系统能够实现碳纳米管拾取操作.本文建立拾取操作中碳纳米管与原子力显微镜(AFM)探针间范德瓦耳斯力力学模型,不同接触状态下范德瓦耳斯力越大越有利于拾取碳纳米管.在SEM视觉反馈图像中建立相对坐标系,首先提出倾角变值方法检测碳纳米管与AFM探针的接触状态,然后运用动态差值方法识别碳纳米管与AFM探针空间位姿并校正碳纳米管位姿,最后自下而上拾取碳纳米管.实验结果表明:拟合直线倾角变值较大时碳纳米管与AFM探针发生接触,动态差值变化为零时碳纳米管与AFM探针为空间线接触,在完全线接触模型下选择合适的接触角度、接触长度和拾取速度能够成功拾取碳纳米管.

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