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  Colloidal crystallite suspensions studied by high pressure small angle x-ray scattering

Schroer, M. A., Westermeier, F., Lehmkühler, F., Conrad, H., Schavkan, A., Zozulya, A. V., et al. (2016). Colloidal crystallite suspensions studied by high pressure small angle x-ray scattering. The Journal of Chemical Physics, 144(8): 084903. doi:10.1063/1.4941563.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-1728-E Version Permalink: http://hdl.handle.net/21.11116/0000-0004-932D-4
Genre: Journal Article

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1.4941563.pdf (Publisher version), 4MB
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http://dx.doi.org/10.1063/1.4941563 (Publisher version)
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 Creators:
Schroer, M. A.1, 2, Author
Westermeier, Fabian3, Author              
Lehmkühler, F.1, 2, Author
Conrad, H.1, Author
Schavkan, A.1, Author
Zozulya, A. V.1, Author
Fischer, B.1, 2, Author
Roseker, W.1, Author
Sprung, M.1, Author
Gutt, C.4, Author
Grübel, G.1, 2, Author
Affiliations:
1Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany, ou_persistent22              
2The Hamburg Centre for Ultrafast Imaging (CUI), Luruper Chaussee 149, 22761 Hamburg, Germany, ou_persistent22              
3Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938288              
4Department of Physics, University of Siegen, Walter-Flex-Str. 3, 57072 Siegen, Germany, ou_persistent22              

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Free keywords: Colloidal systems; High pressure; Suspensions; Crystal structure; Lattice constants
 Abstract: We report on high pressure small angle x-ray scattering on suspensions of colloidal crystallites in water. The crystallites made out of charge-stabilized poly-acrylate particles exhibit a complex pressure dependence which is based on the specific pressure properties of the suspending medium water. The dominant effect is a compression of the crystallites caused by the compression of the water. In addition, we find indications that also the electrostatic properties of the system, i.e. the particle charge and the dissociation of ions, might play a role for the pressure dependence of the samples. The data further suggest that crystallites in a metastable state induced by shear-induced melting can relax to a similar structural state upon the application of pressure and dilution with water. X-ray cross correlation analysis of the two-dimensional scattering patterns indicates a pressure-dependent increase of the orientational order of the crystallites correlated with growth of these in the suspension. This study underlines the potential of pressure as a very relevant parameter to understand colloidal crystallite systems in aqueous suspension.

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Language(s): eng - English
 Dates: 2015-09-042016-01-212016-02-252016-02-28
 Publication Status: Published in print
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1063/1.4941563
 Degree: -

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Title: The Journal of Chemical Physics
  Other : J. Chem. Phys.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Institute of Physics
Pages: - Volume / Issue: 144 (8) Sequence Number: 084903 Start / End Page: - Identifier: ISSN: 0021-9606
CoNE: /journals/resource/954922836226