Segmental mobility studies of poly(N-isopropyl acrylamide) interactions with gold nanoparticles and its use as a thermally driven trapping system
End of embargo2019-05-03
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KeywordsTemperature responsive polymersTime correlated fluorescenceGold nanoparticlesSegmental mobility
Permissions© 2018 Wiley This is the peer reviewed version of the following article: [FULL CITE], which has been published in final form at https://doi.org/10.1002/marc.201800090. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Thermal desolvation of poly(N‐isopropylacrylamide) (PNIPAM) in the presence of a low concentration of gold nanoparticles incorporates the nanoparticles resulting in suspended aggregates. By covalently incorporating <1% acenaphthylene into the polymerization feed this copolymer is enabled to be used as a model to study the segmental mobility of the PNIPAM backbone in response to gold nanoparticles both below and above the desolvation temperature, showing that there is a physical conformational rearrangement of the soluble polymer at ultralow nanoparticle loadings, indicating low affinity interactions with the nanoparticles. Thermal desolvation is capable of extracting >99.9% of the nanoparticles from their solutions and hence demonstrates that poly(N‐isopropylacrylamide) can act as an excellent scrubbing system to remove metallic nanomaterial pollutants from solution.