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| 001 | 873380 | ||
| 005 | 20210401192758.0 | ||
| 024 | 7 | _ | |a 10.1039/C9SM02036E |2 doi |
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| 100 | 1 | _ | |a Cors, Marian |0 0000-0003-3809-7795 |b 0 |
| 245 | _ | _ | |a Contrast variation SANS measurement of shell monomer density profiles of smart core–shell microgels |
| 260 | _ | _ | |a London |c 2020 |b Royal Soc. of Chemistry |
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| 520 | _ | _ | |a The radial density profile of deuterated poly(N,n-propyl acrylamide) shell monomers within core–shell microgels has been studied by small-angle neutron scattering in order to shed light on the origin of their linear thermally-induced swelling. The poly(N-isopropyl methacrylamide) core monomers have been contrast-matched by the H2O/D2O solvent mixture, and the intensity thus provides a direct measurement of the spatial distribution of the shell monomers. Straightforward modelling shows that their structure does not correspond to the expected picture of a well-defined external shell. A multi-shell model solved by a reverse Monte Carlo approach is then applied to extract the monomer density as a function of temperature and of the core crosslinking. It is found that most shell monomers fill the core at high temperatures approaching synthesis conditions of collapsed particles, forming only a dilute corona. As the core monomers tend to swell at lower temperatures, a skeleton of insoluble shell monomers hinders swelling, inducing the progressive linear thermoresponse. |
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| 700 | 1 | _ | |a Wrede, Oliver |0 0000-0002-0020-1334 |b 2 |
| 700 | 1 | _ | |a Feoktystov, Artem |0 P:(DE-Juel1)144382 |b 3 |
| 700 | 1 | _ | |a Cousin, Fabrice |0 0000-0001-7523-5160 |b 4 |
| 700 | 1 | _ | |a Hellweg, Thomas |0 0000-0002-2394-5846 |b 5 |e Corresponding author |
| 700 | 1 | _ | |a Oberdisse, Julian |0 0000-0002-9510-1722 |b 6 |e Corresponding author |
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