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According to the theory of traditional Maxwell-Wagner interface polarization, the metal micro/nano particles have no obvious electrorotation behavior under the alternating current electric field. However, we find the opposite experimental results. In this paper, electrorotation experiments are carried out, and the basic mechanism of gold-coated SU-8 microrods is presented. Therefore the electrorotation characteristics of gold-coated microrod at low frequency are analysed by considering the surface electric double layer at the microrod-electrolyte interface. Specifically, first we establish an approximate ellipsoid model in the electric field, analyze the polarization mechanism of metal particles under the action of solid-liquid interface electric double layer, and then calculate the electrorotation torque and present an electrorotation angular speed formula of the gold-coated microrod. Secondly, electrorotation experiments of gold-coated SU-8 microrods suspended in electrolytes with different conductivities are presented in a frequency range of 100 Hz to 30 MHz. Finally, the experimental results are discussed, and compared with the theoretical analysis, showing the experimental results are in good agreement with theoretical analyses by considering the friction between the microrods and substrate.
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Keywords:
- gold-coated microrod /
- electrorotation /
- electrical double layer /
- microfluidics
[1] Ren Y K, Ao H R, Gu J Z, Jiang H Y, Antonio R 2009 Acta Phys. Sin. 58 7869 (in Chinese) [任玉坤, 敖宏瑞, 顾建忠, 姜洪源, Antonio R 2009 58 7869]
[2] Morgan H, Green N G 2003 AC Electrokinetics: Colloids and Nanoparticles (Beijing: Higher Education Press) p119
[3] Morales M C, Lin H, Zahn J D 2012 Lab. Chip. 12 99
[4] Zhu X L, Yin Z F, Gao Z Q, Ni Z H 2010 Sci. China: Tech. Sci. 53 2388
[5] Yasukawa T, Suzuki M, Shiku H, Matsue T 2009 Sens. Actuator. B: Chem. 142 400
[6] Jones T B 1995 Electromechanics of Particles (New York: Cambridge University Press)
[7] Desai A, Lee S W, Tai C Y 1999 Sens. Actuator. A: Phys. 73 37
[8] Reichle C, Muller T, Schnelle T, Fuhr G 1999 J. Phys. D: Appl.Phys. 32 2128
[9] Zimmermann D, Zhou A, Kiesel M, Feldbauer K, Terpitz U, Haase W, Schneider-Hohendorf T, Bamberg E, Sukhorukov V L 2008 Biochem. Biophys. Res. Commun. 369 1022
[10] Reichle C, Muller T, Schnelle T, Fuhr G 1999 J. Phys. D: Appl.Phys. 32 2128
[11] Jiang H Y, Ren Y K, Han X J, Tao Y, Li S S 2011 Sci. China: Tech. Sci. 54 643
[12] Hermanson K D, Lumsdon S O, Williams J P, Kaler E W, Velev O D 2001 Science 294 1082
[13] Ren Y K, Tao Y, Hou L K, Jiang H Y 2013 Chin. Phys. B 22 087701
[14] Jiang H Y, Ren Y K, Tao Y 2011 Chin. Phys. B 20 057701
[15] Mayya K S, Schoeler B, Caruso F 2003 Adv. Funct. Mater. 13 183
[16] Lim J K, Eggeman A, Lanni F, Tilton R D, Majetich S A 2008 Adv. Mater. 20 1721
[17] Gangwal S, Gayre O J, Bazant M Z, Velev O D 2008 Phys. Rev. Lett. 100 058302
[18] Grosse C, Shilov V N 1996 J. Phys. Chem. 100 1771
[19] Ren Y K, Morganti D, Jiang H Y, Ramos A, Morgan H 2011 Langmuir 27 2128
[20] Lorenz H, Despont M, LaBianca N, Renaud P, Vettiger P 1997 J. Micromech. Microeng. 7 121
[21] Morganti D, Morgan H 2011 Colloid. Surf. A: Phys. 376 67
[22] Rose K A, Meier J A, Dougherty G M, Santiago J G 2007 Phys. Rev. E 75 011503
[23] García-Sanchez P, Ren Y K, Arcenegui J J, Morgan H, Ramos A 2012 Langmuir 28 13861
[24] Minoura I, Muto E 2006 Biophysi. J. 90 3739
[25] Jiang H Y, Ren Y K, Tao Y 2011 Acta Phys. Sin. 60 010701 (in Chinese) [姜洪源, 任玉坤, 陶冶 2011 60 010701]
[26] Ren Y K 2011 Ph. D. Dissertation (Harbin: Harbin Institute of Technology) (in Chinese) [任玉坤 2011 博士学位论文(哈尔滨: 哈尔滨工业大学)]
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[1] Ren Y K, Ao H R, Gu J Z, Jiang H Y, Antonio R 2009 Acta Phys. Sin. 58 7869 (in Chinese) [任玉坤, 敖宏瑞, 顾建忠, 姜洪源, Antonio R 2009 58 7869]
[2] Morgan H, Green N G 2003 AC Electrokinetics: Colloids and Nanoparticles (Beijing: Higher Education Press) p119
[3] Morales M C, Lin H, Zahn J D 2012 Lab. Chip. 12 99
[4] Zhu X L, Yin Z F, Gao Z Q, Ni Z H 2010 Sci. China: Tech. Sci. 53 2388
[5] Yasukawa T, Suzuki M, Shiku H, Matsue T 2009 Sens. Actuator. B: Chem. 142 400
[6] Jones T B 1995 Electromechanics of Particles (New York: Cambridge University Press)
[7] Desai A, Lee S W, Tai C Y 1999 Sens. Actuator. A: Phys. 73 37
[8] Reichle C, Muller T, Schnelle T, Fuhr G 1999 J. Phys. D: Appl.Phys. 32 2128
[9] Zimmermann D, Zhou A, Kiesel M, Feldbauer K, Terpitz U, Haase W, Schneider-Hohendorf T, Bamberg E, Sukhorukov V L 2008 Biochem. Biophys. Res. Commun. 369 1022
[10] Reichle C, Muller T, Schnelle T, Fuhr G 1999 J. Phys. D: Appl.Phys. 32 2128
[11] Jiang H Y, Ren Y K, Han X J, Tao Y, Li S S 2011 Sci. China: Tech. Sci. 54 643
[12] Hermanson K D, Lumsdon S O, Williams J P, Kaler E W, Velev O D 2001 Science 294 1082
[13] Ren Y K, Tao Y, Hou L K, Jiang H Y 2013 Chin. Phys. B 22 087701
[14] Jiang H Y, Ren Y K, Tao Y 2011 Chin. Phys. B 20 057701
[15] Mayya K S, Schoeler B, Caruso F 2003 Adv. Funct. Mater. 13 183
[16] Lim J K, Eggeman A, Lanni F, Tilton R D, Majetich S A 2008 Adv. Mater. 20 1721
[17] Gangwal S, Gayre O J, Bazant M Z, Velev O D 2008 Phys. Rev. Lett. 100 058302
[18] Grosse C, Shilov V N 1996 J. Phys. Chem. 100 1771
[19] Ren Y K, Morganti D, Jiang H Y, Ramos A, Morgan H 2011 Langmuir 27 2128
[20] Lorenz H, Despont M, LaBianca N, Renaud P, Vettiger P 1997 J. Micromech. Microeng. 7 121
[21] Morganti D, Morgan H 2011 Colloid. Surf. A: Phys. 376 67
[22] Rose K A, Meier J A, Dougherty G M, Santiago J G 2007 Phys. Rev. E 75 011503
[23] García-Sanchez P, Ren Y K, Arcenegui J J, Morgan H, Ramos A 2012 Langmuir 28 13861
[24] Minoura I, Muto E 2006 Biophysi. J. 90 3739
[25] Jiang H Y, Ren Y K, Tao Y 2011 Acta Phys. Sin. 60 010701 (in Chinese) [姜洪源, 任玉坤, 陶冶 2011 60 010701]
[26] Ren Y K 2011 Ph. D. Dissertation (Harbin: Harbin Institute of Technology) (in Chinese) [任玉坤 2011 博士学位论文(哈尔滨: 哈尔滨工业大学)]
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