| Date |
Do, 11.09.2014 - Do, 11.09.2014 |
| Time |
11.15 |
| Speaker |
Michela Gazzetto, Laboratory of Quantum Electronics and Nonlinear Optics, Electronics Department, University of Pavia, Italy |
| Location |
Universität Bern, Institut für Angewandte Physik, Gebäude exakte Wissenschaften, Hörsaal B116, Sidlerstrasse 5, 3012 Bern |
| Program |
Opto-electronics tweezers are a promising technique for the realization of fast, highly-reconfigurable array of traps for particle immobilization and manipulation. Exploiting a photoconductive substrate, like Lithium Niobate, a static electric field induced by light can be used to trap a particle, either a cell or an inorganic neutral object by means of a dielectrophoretic force. LN is a very promising material thanks to the presence of the photorefractive effect, that is the insurgence of a semi- permanent yet erasable electric field, called space-charge field, when is illuminated with a light in the visible range. This work combines the known numerical results on photorefractive effect to calculate the dielectrophoretic force on particles suspended in a buffer solution, lying on top of the LN sample surface. An experimental validation of the simulation results was also performed using Poly-methyl-methacrylate beads suspended in paraffin oil on an iron doped LN sample (Fe: LiNbO3). |
| Download |
 (75 KB) |
|
(75 KB) |
| Link |
www.iap.unibe.ch |
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