DNA-functionalization can uniquely tune the architecture of deposited nanoparticle thin films through independently modifying the strength of the nanoparticle-surface interaction and the interparticle repulsion by altering the DNA binding sequence and ionic strength of the solution. In addition, due to the weak polyvalent binding, the DNA-nanoparticle system exhibits surface diffusion and rearrangement that allows for tuning of the morphology through modification of the deposition temperature. The programmability of the DNA-nanoparticle system leads to precise control over the morphology of monolayers, as well as the ability to generate crystalline materials with controllable surface roughness, grain size and crystallographic symmetry through layer-by-layer growth. The increased control over thin film morphology allows for the measurement and tailoring of the mechanical properties of these systems, and holds promise for their use in a variety of applications.

Layer-by-layer growth of DNA-functionalized nanoparticle thin films with tailored surface architectures

256th National Meeting (2018)

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