2022
DOI: 10.26434/chemrxiv-2022-wzwnm
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Depletion-driven assembly of polymer-coated nanocrystals

Abstract: Depletion-driven assembly has been widely studied for micron-sized colloids, but questions remain at the nanoscale where the governing physics are impacted by the stabilizing surface ligands or wrapping polymers, whose length scales are on the same order as those of the colloidal core and the depletant. Here, we probe how wrapping colloidal tin-doped indium oxide nanocrystals with polymers affects their depletion-induced interactions and assembly in solutions of polyethylene glycol. Copolymers of polyacrylic a… Show more

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“…A similar correspondence between the thermodynamic and hydrodynamic diameters was very recently observed for tindoped indium oxide nanocrystals wrapped with three different copolymers dispersed in acetonitrile whose pairwise interactions were also characterized by a purely repulsive potential of mean force. 54 The ability to systematically vary the size of NC building blocks and disperse them in a range of solvents while maintaining hard-particle-like interactions is foundational for design of assembly. Starting from this basis, the effective interactions of such NCs can be customized in a modular and controlled fashion using secondary linking or depletant molecules.…”
mentioning
confidence: 52%
“…A similar correspondence between the thermodynamic and hydrodynamic diameters was very recently observed for tindoped indium oxide nanocrystals wrapped with three different copolymers dispersed in acetonitrile whose pairwise interactions were also characterized by a purely repulsive potential of mean force. 54 The ability to systematically vary the size of NC building blocks and disperse them in a range of solvents while maintaining hard-particle-like interactions is foundational for design of assembly. Starting from this basis, the effective interactions of such NCs can be customized in a modular and controlled fashion using secondary linking or depletant molecules.…”
mentioning
confidence: 52%