X-ray scattering in the vorticity direction and rheometry from confined fluids

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2014
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Baik, Seung Jae
Zhamg, Zhenkun
Vleminckx, Giovanni
Lettinga, Minnie Paul
Grelet, Eric
Vermant, Jan
Clasen, Christian
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Review of Scientific Instruments. 2014, 85, 065108. ISSN 0034-6748. eISSN 1089-7623. Available under: doi: 10.1063/1.4881796
Zusammenfassung

An X-ray flexure-based microgap rheometer (X-FMR) has been designed for combining rheology and in situ small-angle X-ray scattering from the vorticity plane. The gap distance can be varied continuously from 500 μm down to several μm, which provides the unique possibility to generate a strong confinement for many complex fluids. A singular advantage of this setup is the possibility to directly probe the vorticity direction of the flow field with a microfocus X-ray beam and to probe the structural response of the fluid to combined shear and confinement in the vorticity plane. The sliding-plate setup operates over a wide range of shear rates of γ̇ = 10−3–103 s−1 and strains in the range of 10−4–102. The flexure-based bearing maintains the plate parallelism within 10−5 rad. The X-FMR requires very small sample volumes on the order of 10 μl. The applicability of the device is demonstrated here with limited examples of a nematic suspension of fd virus (rods), and a crystalline suspension containing sterically stabilized polystyrene-butylacrylate latex particles.

Zusammenfassung in einer weiteren Sprache
Fachgebiet (DDC)
530 Physik
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Suspensions, X-ray scattering, viruses, vortex dynamics, shear flows
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ISO 690PFLEIDERER, Patrick, Seung Jae BAIK, Zhenkun ZHAMG, Giovanni VLEMINCKX, Minnie Paul LETTINGA, Eric GRELET, Jan VERMANT, Christian CLASEN, 2014. X-ray scattering in the vorticity direction and rheometry from confined fluids. In: Review of Scientific Instruments. 2014, 85, 065108. ISSN 0034-6748. eISSN 1089-7623. Available under: doi: 10.1063/1.4881796
BibTex
@article{Pfleiderer2014scatt-29868,
  year={2014},
  doi={10.1063/1.4881796},
  title={X-ray scattering in the vorticity direction and rheometry from confined fluids},
  volume={85},
  issn={0034-6748},
  journal={Review of Scientific Instruments},
  author={Pfleiderer, Patrick and Baik, Seung Jae and Zhamg, Zhenkun and Vleminckx, Giovanni and Lettinga, Minnie Paul and Grelet, Eric and Vermant, Jan and Clasen, Christian},
  note={Article Number: 065108}
}
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