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Chin. Phys. B, 2013, Vol. 22(8): 087701    DOI: 10.1088/1674-1056/22/8/087701

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
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.
Keywords:  AC electrokinetics      gold-coated microrods      microcircuits      microfluidics  
Received:  10 October 2012      Revised:  22 January 2013      Accepted manuscript online: 
PACS:  77.22.-d (Dielectric properties of solids and liquids)  
  41.20.Cv (Electrostatics; Poisson and Laplace equations, boundary-value problems)  
  82.20.Wt (Computational modeling; simulation)  
Fund: 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).
Corresponding Authors:  Ren Yu-Kun, Jiang Hong-Yuan     E-mail:; jhy

Cite this article: 

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 2013 Chin. Phys. B 22 087701

[1] Hermanson K D, Lumsdon S O, Williams J P, Kaler E W and Velev O D 2001 Science 294 1082
[2] Yu J S, Kim J Y, Lee S, Mbindyo J K N, Martin B R and Mallouk T E 2000 Chem. Commun. 24 2445
[3] Bradley J C, Chen H M, Crawford J, Eckert J, Ernazarova K, Kurzeja T, Lin M D, McGee M, Nadler W and Stephens S G 1997 Nature 389 268
[4] Bradley J C, Ma Z M and Stephens S G 1999 Adv. Mater. 11 374
[5] Suehiro J 2010 Biomicrofluidics 4 022804
[6] Keins P J A, Ismagilov R F and Whitesides G M 1999 Science 285 83
[7] Ren Y K, Morganti D, Jiang H Y, Ramos A and Morgan H 2011 Langmuir. 27 2128
[8] Pethig R 2010 Biomicrofluidics 4 022811
[9] Ren Y K, Ao H R, Gu J Z, Jiang H Y and Aamos A 2009 Acta Phys. Sin. 58 7869 (in Chinese)
[10] Hao T, Xu Y Z, Chen Y H and Xu M 1995 Chin. Phys. Lett. 12 573
[11] Pohl H A 1951 J. Appl. Phys. 22 869
[12] Yang F, Yang X and Jiang H 2010 Biomicrofluidics 4 013204
[13] Yang J, Huang Y, Wang X B, Becker F F and Gascoyne P R C 1999 Anal. Chem. 71 911
[14] Rose K A, Hoffman B, Saintillan D, Shaqfeh E S G and Santiago J G 2009 Phys. Rev. E 79 011402
[15] Rose K A, Meier J A, Dougherty G M and Santiago J G 2007 Phys. Rev. E 75 011503
[16] Bernard L, Calame M, van der Molen S J, Liao J and Schonenberger C 2007 Nanotechnology 18 235202
[17] Gangwal S, Cayre O J, Bazant M Z and Velev O D 2008 Phys. Rev. Lett. 100 058302
[18] Lee J H, Lee Y K and Nam J D 2009 Intermetallics 17 365
[19] Jones T B 1995 Electromechanics of Particles (Cambridge: Cambridge University Press)
[20] Ramos A, Morgan H, Green N G, Gonzalez A and Castellanos A 2005 J. Appl. Phys. 97 084906
[21] Ramos A, Morgan H, Green N G and Castellanos A 1998 J. Phys. D: Appl. Phys. 31 2338
[22] Morganti D and Morgan H 2011 Colloids and Surface A: Physicochem. Eng. Aspects 376 67
[23] Lim J K, Eggman A, Lanni F, Tilton R D and Majetich S A 2008 Adv. Mater. 20 1721
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