Colloidal Self-Assembly with DNA-Coated Particles
Colloidal particles functionalized with DNA open new strategies for colloidal self-assembly. Particles can be coated with one or more DNA “sticky ends” that can be programmed to hybridize at different temperatures. Particles can be either uniformly coated with DNA or coated on well-defined patches with different "valence". Of these, valence 2, which form chains, and valence 4, which coordinate tetrahedrally, are particular interesting. In addition, we also make Janus particles with varying patch size. Using these different particles, we demonstrate how to make new crystal structures, including diamond and pyrochlore, new surfactant-like micelle structures like chains, rings, and lamellae.
Wednesday, April 17, 2019