“Patchy particles” where the surface is anisotropically patterned through variation in the surface composition, can form different colloidal crystal structures and have applications as interface stabilizers, in catalysis and targeted drug delivery. [1] “Patchy nanoparticles” can be formed by adsorbing two chemically different polymer chains that will spontaneously phase separate. Although there is growing interest in polymer based patchy nanoparticles, the majority of the studies have been theoretical rather than experimental due to difficulties in preparing significant quantities of nanoparticles with controlled polymer ratios. [2] As a model system, metal oxide NPs with polystyrene and poly(ethylene oxide) ligands with different ratios were prepared through a simple exchange process. Solution and solid-state NMR experiments designed characterize the phase separation on different length scales were applied to characterize the nanoparticles with mixed polymer ligands and their assemblies in response to different solvent mixtures.<br/>

Characterization of patchy nanoparticles by solid-state NMR

255th National Meeting (2018)

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