%0 Journal Article
%A Pfleiderer, P.
%A Baik, S. J.
%A Zhang, Z.
%A Vleminckx, G.
%A Lettinga, M.P.
%A Grelet, E.
%A Vermant, J.
%A Clasen, C.
%T X-ray scattering in the vorticity direction and rheometry from confined fluids
%J Journal of scientific instruments
%V 85
%N 6
%@ 0950-7671
%C London
%I Inst.
%M FZJ-2014-04807
%P 065108
%D 2014
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000339010500062
%R 10.1063/1.4881796
%U https://juser.fz-juelich.de/record/155849