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Soft particles in an electric field-a zero average contrast study

Nöjd, Sofi LU ; Hirst, Christopher LU ; Obiols-Rabasa, Marc LU ; Schmitt, Julien LU ; Radulescu, Aurel ; Mohanty, Priti S. LU and Schurtenberger, Peter LU (2019) In Soft Matter 15(31). p.6369-6374
Abstract

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... (More)

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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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Soft Matter
volume
15
issue
31
pages
6 pages
publisher
Royal Society of Chemistry
external identifiers
  • pmid:31304503
  • scopus:85070561533
ISSN
1744-683X
DOI
10.1039/c9sm01208g
language
English
LU publication?
yes
id
340b03ee-1615-4dfd-a267-a4f000f0f1a7
date added to LUP
2019-08-23 13:11:10
date last changed
2021-03-03 02:11:12
@article{340b03ee-1615-4dfd-a267-a4f000f0f1a7,
  abstract     = {<p>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).</p>},
  author       = {Nöjd, Sofi and Hirst, Christopher and Obiols-Rabasa, Marc and Schmitt, Julien and Radulescu, Aurel and Mohanty, Priti S. and Schurtenberger, Peter},
  issn         = {1744-683X},
  language     = {eng},
  month        = {01},
  number       = {31},
  pages        = {6369--6374},
  publisher    = {Royal Society of Chemistry},
  series       = {Soft Matter},
  title        = {Soft particles in an electric field-a zero average contrast study},
  url          = {http://dx.doi.org/10.1039/c9sm01208g},
  doi          = {10.1039/c9sm01208g},
  volume       = {15},
  year         = {2019},
}