Liquid microvortex generated around a laser focal point in an intense high-frequency electric field
- 1 January 1995
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industry Applications
- Vol. 31 (3) , 464-468
- https://doi.org/10.1109/28.382104
Abstract
A microvortex was discovered in liquid films when subjected to the combined action of a focused laser beam and a high-frequency electric field. The laser beam was perpendicular to both the surface of the liquid film and the direction of the electric field. The size of this opto-electrostatic microvortex (OEMV) in various liquids (water, ethanol, acetone, nitrobenzene) varied with the experimental conditions, but stayed in the 10-/spl mu/m range. The velocity of the liquid flow in the vortex could be controlled by the intensity and frequency of the electric field (5.0/spl times/10/sup 4/ to 0.8/spl times/10/sup 6/ V/m, 2/spl times/10/sup 4/ to 1/spl times/10/sup 6/ Hz), by the laser power (0.01 to 2 W) and by the laser power density in the focal point. No microvortex was observed in benzene and chloroform. As an application of this phenomenon, single DNA molecules could be transported along the OEMV.<>Keywords
This publication has 11 references indexed in Scilit:
- Electrostatic manipulation of DNA in microfabricated structuresPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Handling of biological cells using fluid integrated circuitPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Levitation, holding, and rotation of cells within traps made by high-frequency fieldsBiochimica et Biophysica Acta (BBA) - Biomembranes, 1992
- Opto-Electrostatic Micro-Manuplation of Cells and Fine Particles.The Review of Laser Engineering, 1991
- Dielectrophoretic spectra of single cells determined by feedback-controlled levitationBiophysical Journal, 1990
- Biophysics of electroinjection and electrofusionJournal of Electrostatics, 1988
- Electro-rotation: development of a technique for dielectric measurements on individual cells and particlesJournal of Electrostatics, 1988
- Optical trapping and manipulation of single cells using infrared laser beamsNature, 1987
- Optical Trapping and Manipulation of Viruses and BacteriaScience, 1987
- Visualization of Individual DNA Molecules in Solution by Light Microscopy: DAPI Staining Method1The Journal of Biochemistry, 1981