[1]张艳,卜浩,王玉娟,等.基于原子力显微镜的纳米尺度摩擦力的速度依赖关系[J].东南大学学报(自然科学版),2012,42(2):286-289.[doi:10.3969/j.issn.1001-0505.2012.02.018]
 Zhang Yan,Pu Hao,Wang Yujuan,et al.Velocity-dependent nano-scale friction under atomic force microscope[J].Journal of Southeast University (Natural Science Edition),2012,42(2):286-289.[doi:10.3969/j.issn.1001-0505.2012.02.018]
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基于原子力显微镜的纳米尺度摩擦力的速度依赖关系()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
42
期数:
2012年第2期
页码:
286-289
栏目:
机械工程
出版日期:
2012-03-20

文章信息/Info

Title:
Velocity-dependent nano-scale friction under atomic force microscope
作者:
张艳 卜浩 王玉娟 陈云飞
东南大学机械工程学院,南京 210096; 江苏省微纳生物医疗器械设计与制造重点实验室,南京 210096
Author(s):
Zhang Yan Pu Hao Wang Yujuan Chen Yunfei
School of Mechanical Engineering, Southeast University, Nanjing 210096, China
Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Nanjing 210096, China
关键词:
原子力显微镜 摩擦力 扫描速度 非线性
Keywords:
atomic force microscope friction scanning velocity nonlinear
分类号:
TH117.3
DOI:
10.3969/j.issn.1001-0505.2012.02.018
摘要:
以硅为探针、带有自然氧化物的硅(100)晶面为基底样品,利用原子力显微镜研究了探针扫描速度对于单个微凸体系统中摩擦力的影响.首先,利用热噪声标定法测量出硅悬臂梁的法向弹簧常数和法向灵敏度; 然后,利用改进的楔形校准法,通过扫描三角光栅得出侧向灵敏度; 最后,测量出扫描区域为15 μm×15μm、正压力为-5~10nN、扫描速度为2.5~1000μm/s下的摩擦力.实验结果表明,不同速度下摩擦力随正压力的增加呈近似线性增加,服从经典库仑定律.当扫描速度小于40μm/s时,速度增加所导致的摩擦力的增加不明显; 当扫描速度大于40μm/s时,速度增加则引起摩擦力急剧增加.该结果与热激发的Tomlinson模型的计算结果吻合.
Abstract:
The effect of the scanning velocity on the friction in a convex system is studied between a Si tip and a naturally oxidized Si(100)substrate by the atomic force microscope(AFM). Firstly, the normal spring constant and the normal sensitivity of the Si cantilever are calibrated by the thermal noise calibration method. Then, the lateral sensitivity is obtained through scanning a triangular grating by the improved wedge calibration method. Finally, the friction-load relation curves with the scan area of 15 μm×15 μm, the normal force of -5~10 nN and the scanning velocity of 2.5~1 000 μm/s are obtained. The experimental results show that with different velocities, the friction increases nearly linearly with the load, which obeys the classical Coulomb law. When the scanning velocity is below 40 μm/s, the increase in the friction is insignificant due to the increase in the velocity. In contrast, when the velocity exceeds 40 μm/s, the friction enhancement becomes significant. The nonlinear correlation between the frictional force and the scanning velocity coincides with the results computed by the thermally-excited Tomlinson model.

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备注/Memo

备注/Memo:
作者简介: 张艳(1976—),女,讲师, 101006926@seu.edu.cn.
基金项目: 国家重大基础研究发展计划(973计划)资助项目(2011CB707605)、国家自然科学基金资助项目(50875047, 50925519)、江苏省自然科学基金资助项目(BK2008201).
引文格式: 张艳,卜浩,王玉娟,等.基于原子力显微镜的纳米尺度摩擦力的速度依赖关系[J].东南大学学报:自然科学版,2012,42(2):286-289. [doi:10.3969/j.issn.1001-0505.2012.02.018]
更新日期/Last Update: 2012-03-20