首页 | 本学科首页   官方微博 | 高级检索  
     

微系统中转矩及电渗流作用下的微粒子电动旋转操控
引用本文:姜洪源,任玉坤,陶冶. 微系统中转矩及电渗流作用下的微粒子电动旋转操控[J]. 物理学报, 2011, 60(1): 10701-010701
作者姓名:姜洪源  任玉坤  陶冶
作者单位:(1)哈尔滨工业大学机电工程学院,哈尔滨 150001; (2)哈尔滨工业大学机电工程学院,哈尔滨 150001;浙江大学流体传动及控制国家重点实验室,杭州 310027
基金项目:国家自然科学基金(批准号:51075087),浙江大学流体传动及控制国家重点实验室基金(批准号:GZKF-201004)和国家留学基金(批准号:2009612129)资助的课题.
摘    要:微粒子的电动旋转操控是表征分散系中微粒子介电特性的有效方法.低雷诺数微系统中,以Maxwell-Wagner极化理论为基础,进行了转矩作用下的微粒子电动旋转机理研究,推导了此机理作用下微粒子电动旋转峰值速度所对应的特征频率,分析了弛豫时间对粒子旋转方向的影响,对转矩作用下的微粒子电动旋转速度进行仿真;以双电层理论为基础,对电渗流导致的微粒子电动旋转机理进行定性分析,提出具有金修饰的粒子表面更适合电渗流作用下的电动旋转研究.分别以羧基修饰的聚苯乙烯微球以及表面被金修饰的聚苯乙烯微球为操控对象,进行电动旋转实关键词:微系统电动旋转转矩电渗流

关 键 词:微系统  电动旋转  转矩  电渗流
收稿时间:2010-04-04

Electrorotation manipulation of microparticles induced by torque and electroosmotic slip in microsystem
Jiang Hong-Yuan,Ren Yu-Kun,Tao Ye. Electrorotation manipulation of microparticles induced by torque and electroosmotic slip in microsystem[J]. Acta Physica Sinica, 2011, 60(1): 10701-010701
Authors:Jiang Hong-Yuan  Ren Yu-Kun  Tao Ye
Affiliation:School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China;State Key Laboratory of Eluid Pwer Transimission and Control, Zhejiang University, Hangzhou 310027, China;School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China;School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China
Abstract:Electrorotation is an effective technique to characterize the electrical properties of dispersed particles. For the low Reynolds number microsystem, the mechanism of the electrorotation of microparticles induced by torque was analyzed based on the Maxwell-Wagner polarization. Characteristic frequency corresponding to the peak value of the electrorotation speed was deduced and the effect of the relaxation time on the particles' electrorotation direction was analyzed by the simulation of the electrorotation speed induced by the torque. The mechanism of the electrorotation of the microparticles induced by electroosmotic slip was qualitative analyzed based on the double layer and the idea about the gold surface being favorable to the electrorotation was proposed. Experiments on the electrorotation of the polystyrene with the carboxy surface and gold modified surface were performed, respectively. The results show that, the direction of the electrorotation of polystyrene spheres with carboxy surface is opposite to the electric field and, the corresponding frequency is higher with the torque playing the leading role. On the other hand, direction of the rotation of polystyrene spheres with the gold surface is homodromous with the electric field and the corresponding frequency is lower with the electroosmotic slip playing the leading rose.
Keywords:microsystem  electrorotation  torque  electroosmotic slip
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《物理学报》浏览原始摘要信息
点击此处可从《物理学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号