TY  - JOUR
AU  - Houston, Judith Elizabeth
AU  - Fruhner, Lisa
AU  - de la Cotte, Alexis
AU  - Rojo González, Javier
AU  - Petrunin, Alexander Valerievich
AU  - Gasser, Urs
AU  - Schweins, Ralf
AU  - Allgaier, J.
AU  - Richtering, Walter
AU  - Fernandez-Nieves, Alberto
AU  - Scotti, Andrea
TI  - Resolving the different bulk moduli within individual soft nanogels using small-angle neutron scattering
JO  - Science advances
VL  - 8
IS  - 26
SN  - 2375-2548
CY  - Washington, DC [u.a.]
PB  - Assoc.
M1  - FZJ-2023-00999
SP  - eabn6129
PY  - 2022
AB  - The bulk modulus, K, quantifies the elastic response of an object to an isotropic compression. For soft compressible colloids, knowing K is essential to accurately predict the suspension response to crowding. Most colloids have complex architectures characterized by different softness, which additionally depends on compression. Here, we determine the different values of K for the various morphological parts of individual nanogels and probe the changes of K with compression. Our method uses a partially deuterated polymer, which exerts the required isotropic stress, and small-angle neutron scattering with contrast matching to determine the form factor of the particles without any scattering contribution from the polymer. We show a clear difference in softness, compressibility, and evolution of K between the shell of the nanogel and the rest of the particle, depending on the amount of cross-linker used in their synthesis.
LB  - PUB:(DE-HGF)16
C6  - 35776796
UR  - <Go to ISI:>//WOS:000823432200010
DO  - DOI:10.1126/sciadv.abn6129
UR  - https://juser.fz-juelich.de/record/943413
ER  -