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• W2892077248 startingPage "1654" @default.
• W2892077248 abstract "Nanoparticles grafted with a dense brush of hydrophilic polymers exhibit high colloidal stability. However, reversible aggregation can be triggered by an increase in temperature if the polymer is thermoresponsive, as the polymer shell partly loses its hydration. We investigate the role of nanoparticle curvature on the critical solution temperature (CST) of grafted poly(2-isopropyl-2-oxazoline) (PiPOx) and critical flocculation temperature (CFT) of the core-shell nanoparticle dispersion. Cores with diameters ranging from 5 to 21 nm were studied by temperature-cycled dynamic light scattering and differential scanning calorimetry over a large range of concentrations. We show that core size and curvature only have a minor influence on particle aggregation (CFT and cluster size), while they have major influence on the CST of the polymer shell. The densely grafted shells exhibit three distinct solvation transitions, the relative contributions of each is controlled by the core curvature. We link these transitions to different polymer density regimes within the spherical brush and demonstrate that the CST of the innermost part of the brush coincides with the CFT of the particle dispersion." @default.
• W2892077248 created "2018-09-27" @default.
• W2892077248 creator A5041685218 @default.
• W2892077248 creator A5057969078 @default.
• W2892077248 date "2018-09-07" @default.
• W2892077248 modified "2023-10-17" @default.
• W2892077248 title "Thermoresponsive Core-Shell Nanoparticles: Does Core Size Matter?" @default.
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• W2892077248 doi "https://doi.org/10.3390/ma11091654" @default.
• W2892077248 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6163620" @default.
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• W2892077248 hasPublicationYear "2018" @default.
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