Journal
SOFT MATTER
Volume 15, Issue 31, Pages 6369-6374Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9sm01208g
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Funding
- Swedish Research Council [2011-4338, 2014-4037]
- European Research Council [ERC-339678-COMPASS]
- European Commission under the Seventh Framework Program [262348]
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We report on the structural properties of ionic microgel particles subjected to alternating electric fields, using small-angle neutron scattering. The experiments were performed under so-called zero average contrast conditions, which cancel the structure factor contribution to the scattered intensity, allowing us to obtain direct information on the single particle size and structure as particles align in field-induced strings. Our results reveal only a marginal compression of the particles as they align in strings, and indicate considerable particle overlap at higher field strengths. These findings provide further insight into the origins of the previously reported unusual path dependent field-induced crystal-crystal transition found for these systems (P. S. Mohanty et al., Phys. Rev. X, 2015, 5, 011030).
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