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Classical nucleation and growth of DNA-programmed colloidal crystallization
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Classical nucleation and growth of DNA-programmed colloidal crystallization
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Classical nucleation and growth of DNA-programmed colloidal crystallization
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Paper
Classical nucleation and growth of DNA-programmed colloidal crystallization
2021
Overview
DNA-coated colloids can self-assemble into an incredible diversity of crystal structures, but applications of this technology are limited by poor understanding and control over the dynamical crystallization pathways. To address this challenge, we use microfluidics to quantify the self-assembly dynamics of DNA-programmed colloidal crystals, from thermally-activated nucleation through reaction-limited and diffusion-limited phases of crystal growth. Our detailed measurements of the temperature and concentration dependence of the kinetics at all stages along the crystallization pathway provide a stringent test of classical theories of nucleation and growth. After accounting for the finite rolling rate of micrometer-sized DNA-coated colloids, we find that modified versions of these classical theories quantitatively predict the absolute nucleation and growth rates. We conclude by applying our model to design and demonstrate protocols for assembling large single crystals, including crystals with pronounced structural coloration, an essential step in the creation of next-generation functional materials from colloids.
Publisher
Cornell University Library, arXiv.org
