Millisecond timescale reactions observed via X-ray spectroscopy in a 3D microfabricated fused silica mixer

Huyke, D.A.; Ramachandran, A.; Ramirez-Neri, O.; Guerrero-Cruz, J.A.; Gee, L.B.; Braun, A.; Sokaras, D.; Garcia-Estrada, B.; Solomon, E.I.; Hedman, B.; Delgado-Jaime, M.U.; DePonte, D.P.; Kroll, T.; Santiago, J.G.

doi:10.1107/S1600577521003830

Figure 4
Experimental setup at the X-ray beamline and comparison with simulations. (a) Schematic of mixer placed at a 35° angle to the incident X-rays. (b) Mixer mounted on the beamline plate during X-ray operation. (c) Line-of-sight integrated profile of predicted axisymmetric concentration fields for all Fe species (top row) and measured Fe X-ray fluorescence (bottom row). The gray area in the X-ray image depicts the region where the sample stream cross-sectional area is too small for X-ray detection. Note that the convolutive effect of the X-ray beam significantly widens the apparent sample. (d) The left ordinate (corresponding to the line) is the predicted sample FWHM w_sa and the right ordinate (corresponding to the symbols) is the sample width associated with the emitted X-ray intensities w_x. Both quantities are plotted versus the axial position x and data are for the same flow conditions as (c). The vertical and horizontal uncertainty bars, respectively, correspond to the standard deviation of w_x among four different methods of measuring the emitted X-ray intensity and the X-ray beam FWHM along x. The inset shows the experimental device and a zoomed-in view of an example X-ray mark on the polyimide capillary.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 28| Part 4| July 2021| Pages 1100-1113

https://doi.org/10.1107/S1600577521003830

Search IUCr Journals		doi		Advanced search
Author		volume	page