Colloidal interactions and self-assembly using DNA hybridization |
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Authors: | Biancaniello Paul L Kim Anthony J Crocker John C |
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Institution: | Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. |
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Abstract: | The specific binding of complementary DNA strands has been suggested as an ideal method for directing the controlled self-assembly of microscopic objects. We report the first direct measurements of such DNA-induced interactions between colloidal microspheres, as well as the first colloidal crystals assembled using them. The interactions measured with our optical tweezer method can be modeled in detail by well-known statistical physics and chemistry, boding well for their application to directed self-assembly. The microspheres' binding dynamics, however, have a surprising power-law scaling that can significantly slow annealing and crystallization. |
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