Thermally reversible self-assembly of nanoparticles via polymer crystallization.


The directed self-assembly of gold nanoparticles through the crystallization of surface-grafted polyethylene oxide (PEO) in ethanol-water mixtures is described. This process is fully reversible and tunable through either the size of the core or the polymeric coating. Characterization by X-ray scattering and electron microscopy of the self-assembled structures reveals order at the nanoscale, typically not the case for thermoresponsive gold nanoparticles coated with lower or upper critical solution temperature polymers. A further novelty is the result of selective binding of calcium ions to the PEO in the fluid state: a reversible thermoresponsive transition become irreversible.

DOI: 10.1002/marc.201400457

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@article{Kinnear2014ThermallyRS, title={Thermally reversible self-assembly of nanoparticles via polymer crystallization.}, author={Calum Kinnear and Sandor Balog and Barbara Rothen-Rutishauser and Alke Petri-Fink}, journal={Macromolecular rapid communications}, year={2014}, volume={35 23}, pages={2012-7} }