• R Dasgupta

      Articles written in Pramana – Journal of Physics

    • Manipulation of microparticles and red blood cells using optoelectronic tweezers

      R S Verma R Dasgupta N Kumar S Ahlawat A Uppal P K Gupta

      More Details Abstract Fulltext PDF

      We report the development of an optoelectronic tweezers set-up which works by lightinduced dielectrophoresis mechanism to manipulate microparticles. We used thermal evaporation technique for coating the organic polymer, titanium oxide phthalocyanine (TiOPc), as a photoconductive layer on ITO-coated glass slide. Compare to the conventional optical tweezers, the technique requires optical power in 𝜇W range and provides a manipulation area of a few mm2. The set-up was used to manipulate the polystyrene microspheres and red blood cells (RBCs). The RBCs could be attracted or repelled by varying the frequency of the applied AC bias.

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