Automatic microcircuit formation based on gold-coated SU-8 microrods via dielectrophoresis

doi:10.1088/1674-1056/22/8/087701

中国物理B ›› 2013, Vol. 22 ›› Issue (8): 87701-087701.doi: 10.1088/1674-1056/22/8/087701

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Automatic microcircuit formation based on gold-coated SU-8 microrods via dielectrophoresis

任玉坤^{a b c}, 陶冶^a, 侯立凯^a, 姜洪源^a

a School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China;
b School of Chemical Engineering & Technology, Harbin Institute of Technology, Harbin 150001, China;
c State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China

收稿日期:2012-10-10 修回日期:2013-01-22 出版日期:2013-06-27 发布日期:2013-06-27
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 51075087), the Funds from the State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, China (Grant Nos. GZKF-201107 and GZKF-201004), and the Foundation from the China Scholarship Council (Grant No. 2009612129).

Automatic microcircuit formation based on gold-coated SU-8 microrods via dielectrophoresis

Ren Yu-Kun (任玉坤)^{a b c}, Tao Ye (陶冶)^a, Hou Li-Kai (侯立凯)^a, Jiang Hong-Yuan (姜洪源)^a

a School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China;
b School of Chemical Engineering & Technology, Harbin Institute of Technology, Harbin 150001, China;
c State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China

Received:2012-10-10 Revised:2013-01-22 Online:2013-06-27 Published:2013-06-27
Contact: Ren Yu-Kun, Jiang Hong-Yuan E-mail:rykhit@hit.edu.cn; jhy hit@sina.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 51075087), the Funds from the State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, China (Grant Nos. GZKF-201107 and GZKF-201004), and the Foundation from the China Scholarship Council (Grant No. 2009612129).

摘要/Abstract

摘要： To explore the application of the characteristics of metallic microparticles, alternating current electric trapping of the SU-8 microrods coated with a thin gold layer by the chemical approach is investigated. Positive dielectrophoresis is used to absorb the gold-coated SU-8 microrods at the edge of the parallel electrodes, thereby forming chains to connect the electrodes. This is a fast automatic microcircuit formation process. Moreover, a non-charged molecule is modified on the surface of the gold-coated SU-8 microrod, and the modified microrods are controlled by the alternating electric field to form a number of chains. The different chains between the parallel electrodes consist of various parallel circuits. In order to compare these chains with different electric surfaces, the impedances of the metallic and modified microrods are measured and compared, and the results show that the gold-coated microrods act as pure resistors, while the microrods functionalized by a non-charged molecule behave as good capacitors.

关键词: AC electrokinetics, gold-coated microrods, microcircuits, microfluidics

Abstract: To explore the application of the characteristics of metallic microparticles, alternating current electric trapping of the SU-8 microrods coated with a thin gold layer by the chemical approach is investigated. Positive dielectrophoresis is used to absorb the gold-coated SU-8 microrods at the edge of the parallel electrodes, thereby forming chains to connect the electrodes. This is a fast automatic microcircuit formation process. Moreover, a non-charged molecule is modified on the surface of the gold-coated SU-8 microrod, and the modified microrods are controlled by the alternating electric field to form a number of chains. The different chains between the parallel electrodes consist of various parallel circuits. In order to compare these chains with different electric surfaces, the impedances of the metallic and modified microrods are measured and compared, and the results show that the gold-coated microrods act as pure resistors, while the microrods functionalized by a non-charged molecule behave as good capacitors.

Key words: AC electrokinetics, gold-coated microrods, microcircuits, microfluidics

中图分类号: (Dielectric properties of solids and liquids)

77.22.-d

41.20.Cv (Electrostatics; Poisson and Laplace equations, boundary-value problems) 82.20.Wt (Computational modeling; simulation)

任玉坤, 陶冶, 侯立凯, 姜洪源. Automatic microcircuit formation based on gold-coated SU-8 microrods via dielectrophoresis[J]. 中国物理B, 2013, 22(8): 87701-087701.

Ren Yu-Kun (任玉坤), Tao Ye (陶冶), Hou Li-Kai (侯立凯), Jiang Hong-Yuan (姜洪源). Automatic microcircuit formation based on gold-coated SU-8 microrods via dielectrophoresis[J]. Chin. Phys. B, 2013, 22(8): 87701-087701.

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Automatic microcircuit formation based on gold-coated SU-8 microrods via dielectrophoresis

Automatic microcircuit formation based on gold-coated SU-8 microrods via dielectrophoresis

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