Study of particle motion in electric fields
Optoelectrofluidics , also known as optically induced electrohydrodynamics , refers to the study of the motions of particles or molecules and their interactions with optically-induced electric field and the surrounding fluid.
This concept includes electrothermal vortex, electrophoresis , dielectrophoresis, and electroosmosis induced by combination of optical and electrical energy or by optical-electrical energy transfer.
In 1995, an electrothermal vortices induced by a strong IR (infrared ) laser projected into an electric field have been utilized to concentrate microparticles and molecules. In 2000, UV(ultraviolet ) pattern projected onto ITO (indium tin oxide ) electrode has been applied for patterning colloidal particles. Illumination of the ITO electrode by UV light results in a small increase in the current from the generation of electron-hole pairs at the ITO/water interface. In 2005, optoelectronic tweezers (OET), wherein a photoconductive material was utilized to induce electric field using the optical decrement of electrical resistance on a partially illuminated area, has been reported. After that, many researches in several view-points have been performed as below.
Display Devices
1. DMD(digital micromirror device )-based Optoelectronic Tweezers (OET) : P.Y. Chiou, et al. , Nature 436 , pp. 370-372 (2005) Projector -based Image Dielectrophoresis (iDEP) : Y.-s. Lu, et al. , Opt. Quant. Elec. 37 , pp. 1385-1395 (2006) liquid crystal display )-based Lab-on-a-Display (LOD) : W. Choi, et al. , Microfluid. Nanofluid. 3 , pp. 217-225 (2007) H. Hwang, et al. , Electrophoresis 29 , pp. 1203-1212 (2008)
System Configuration
1. Interactive & Microscope-integrated System : H. Hwang, et al. , Electrophoresis 29 , pp. 1203-1212 (2008) H. Hwang, et al. , Appl. Phys. Lett. 92 , pp. 024108 (2008) S. Park, et al. , Appl. Phys. Lett. 92 , pp. 151101 (2008) Electrowetting Device : G.J. Shah, et al. , Lab Chip doi :10.1039/b821508a (2009)H. Hwang and J.-K. Park, Anal. Chem. doi :10.1021/ac901047v (2009)
Target Materials
1. Cultured cells : A.T. Ohta, et al. , IEEE J. Sel. Top. Quant. Elec. 13 , pp. 237-240 (2007) DNA : M. Hoeb, et al. , Biophys. J. 93 , pp. 1032-1038 (2007) Blood cell : H. Hwang, et al. , Electrophoresis 29 , pp. 1203-1212 (2008) A. Jamshidi, et al. , Nat. Photon. 2 , pp. 86-89 (2008) bacteria : W. Choi, et al. , Appl. Phys. Lett. 93 , pp. 143901 (2008) Oocyte : H. Hwang, et al. , Biomicrofluidics 3 , pp. 014103 (2009) Polysaccharide , Protein and Fluorophore : H. Hwang and J.-K. Park, Anal. Chem. doi :10.1021/ac901047v (2009)
Operating Principles
1. Dielectrophoresis (DEP) : Most of the researches above.Electro-osmosis (ACEO) : P.-Y. Chiou, et al. , J. Microelectromech. Syst. 17 , pp. 525-531 (2008) W. Choi, et al. , Appl. Phys. Lett. 93 , pp. 143901 (2008) A. Mizuno, et al. , IEEE Trans. Ind. Appl. 31 , pp. 464-468 (1995) , S.J. Williams, A. Kumar and S. T. Wereley, Lab Chip 8 , pp. 1879-1882 (2008) H. Hwang and J.-K. Park, Lab Chip 9 , pp. 199-206 (2009) , H. Hwang and J.-K. Park, Anal. Chem. doi :10.1021/ac901047v (2009)
6. Optically induced electrohydrodynamic instability (OEHI): Feifei Wang, Haibo Yu, Wenfeng Liang, Lianqing Liu, John D. Mai, Gwo-Bin Lee, Wen Jung Li, Microfluidics and Nanofluidics, Volume 16, Issue 6, pp. 1097–1106
Other Phenomena
1. Surface-Particle Interactions : H. Hwang, et al. , Appl. Phys. Lett. 92 , pp. 024108 (2008) et al. , J. Phys. Chem. B 32 , pp. 9903–9908 (2008) doi :10.1021/jp803596r
Applications
1. Microlens Array Fabrication : J.-Y. Huang, Y.-S. Lu and J. A. Teh, Opt. Express 14 , pp. 10779-10784 (2006) H. Hwang and J.-K. Park, Lab Chip 9 , pp. 199-206 (2009) H. Hwang, et al. , Biomicrofluidics 3 , pp. 014103 (2009)J.K. Valley, et al. , Lab Chip doi :10.1039/b821678a (2009)H. Hwang and J.-K. Park, Anal. Chem. doi :10.1021/ac901047v (2009)H. Hwang, Y.-H. Park and J.-K. Park, Langmuir 25 , pp. 6010-6014 (2009)
Research Groups
1. Ming C. Wu's Group : Integrated Photonics Laboratory, UC Berkeley, CA, USA NanoBiotech Laboratory, KAIST, KOREA Optoelectronic Biofluidics Laboratory, UCLA, CA, USA Steve Wereley 's Group : Microfluidics Laboratory, Purdue University, IN, USA Aloke Kumar 's Group : Kumar Biomicrofluidics Laboratory [1] [2]
References
