TY  - JOUR
AU  - Pfleiderer, P.
AU  - Baik, S. J.
AU  - Zhang, Z.
AU  - Vleminckx, G.
AU  - Lettinga, M.P.
AU  - Grelet, E.
AU  - Vermant, J.
AU  - Clasen, C.
TI  - X-ray scattering in the vorticity direction and rheometry from confined fluids
JO  - Journal of scientific instruments
VL  - 85
IS  - 6
SN  - 0950-7671
CY  - London
PB  - Inst.
M1  - FZJ-2014-04807
SP  - 065108
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000339010500062
DO  - DOI:10.1063/1.4881796
UR  - https://juser.fz-juelich.de/record/155849
ER  -