Volume 106, Number 2, April 2014
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||23 April 2014|
Direct comparison of SESANS and SAXS to measure colloidal interactions
1 Adolphe Merkle Institute, University of Fribourg - Rte de l'ancienne Papeterie 1, CH-1723 Marly, Switzerland
2 Delft University of Technology - Mekelweg 15, 2629 JB Delft, The Netherlands
3 Physical Chemistry, Lund University - Getingevägen 60, SE-221 00 Lund, Sweden
(a) Present address: Firmenich SA - Route des Jeunes 1, CH-1211 Geneva, Switzerland; Kitty.vanGruijthuijsen@gmail.com
Received: 22 January 2014
Accepted: 3 April 2014
We present a systematic comparison of conventional small-angle X-ray scattering (SAXS) with the relatively new real-space technique, spin-echo small-angle neutron scattering (SESANS). We apply both techniques to colloidal suspensions where the particles interact as hard spheres, with electrostatic repulsions, or with polymer-induced depletion attractions. We successfully model the data sets with the appropriate colloid-colloid interaction potentials to determine the colloid radius, effective volume fraction, and surface charge, while illustrating the different representations of colloid structuring related to both techniques.
PACS: 83.85.Hf – X-ray and neutron scattering / 82.70.Dd – Colloids / 83.80.Hj – Suspensions, dispersions, pastes, slurries, colloids
© EPLA, 2014
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