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Optoelectronic tweezers; optically-induced dielectrophoresis; AC dielectrophoresis.

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.

R S Verma¹ R Dasgupta¹ N Kumar¹ S Ahlawat¹ A Uppal¹ P K Gupta¹

1. Raja Ramanna Centre for Advanced Technology, Indore 452 013, India

Published

February 2014

Early published

13 February 2014