Form factor analysis of thermorespsonsive core-shell microgels in the fully swollen and collapsed state
PNIPAM microgels show a significant increase in light scattering when heated above the volume phase transition temperature. This behavior can be explained by the increasing polymer volume fraction - affecting the refractive index - dominating over the effect of significantly reduced particle size in the collapsed state. Although this observation is well-known, a quantitative description is still missing. Recently we were successful in theoretically describing the light scattering of core-shell microgels using finite difference time domain simulations. From these simulations we could extract the polymer volume fraction (shell) and the resulting refractive index for a broad range of swelling states covering the volume phase transition. With the proposed SANS experiment we want to study the form factor of different core-shell microgels in the fully swollen and collapsed state. This will allow us to get access to the polymer density profile of the shells experimentally. We want to study five core-shell systems (gold cores, PNIPAM shells with shell thicknesses in the range of 124 nm and 188 nm (hydrodynamic radius, swollen state) and cross-linker degrees of 5, 15 and 25%.
The data is currently only available to download if you are a member of the proposal team.
The recommended format for citing this dataset in a research publication is in the following format:
KARG Matthias and PREVOST Sylvain. (2020). Form factor analysis of thermorespsonsive core-shell microgels in the fully swollen and collapsed state. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.EASY-632
This data is not yet public
This data is not yet public
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