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Houston, Judith Elizabeth [Author]; Fruhner, Lisa [Author]; Scotti, Andrea [Author]; de la Cotte, Alexis [Author]; Rojo González, Javier [Author]; Petrunin, Alexander Valerievich [Author]; Gasser, Urs [Author]; Schweins, Ralf [Author]; Allgaier, J. [Author]; Richtering, Walter [Author]; Fernandez-Nieves, Alberto [Author]

Resolving the different bulk moduli within individual soft nanogels using small-angle neutron scattering

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  • Media type: E-Article
  • Title: Resolving the different bulk moduli within individual soft nanogels using small-angle neutron scattering
  • Contributor: Houston, Judith Elizabeth [Author]; Fruhner, Lisa [Author]; Scotti, Andrea [Author]; de la Cotte, Alexis [Author]; Rojo González, Javier [Author]; Petrunin, Alexander Valerievich [Author]; Gasser, Urs [Author]; Schweins, Ralf [Author]; Allgaier, J. [Author]; Richtering, Walter [Author]; Fernandez-Nieves, Alberto [Author]
  • Published: Assoc., 2022
  • Published in: Science advances 8(26), eabn6129 (2022). doi:10.1126/sciadv.abn6129
  • Language: English
  • DOI: https://doi.org/10.1126/sciadv.abn6129; https://doi.org/10.34734/FZJ-2023-00999
  • ISSN: 2375-2548
  • Origination:
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  • Description: 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.
  • Access State: Open Access