A dilute gold nanoparticles suspension as SAXS standard for absolute scale using an extended Guinier approximation
Abstract
In this article, a practical procedure for absolute intensity calibration for SAXS studies on liquid microjets is established, using a gold nanoparticle suspension as standard so that the intercept at Q=0 of the SAXS scattering curve would provide a scaling reference. In order to get the most precise extrapolation at Q=0, we used an extension to the Guinier approximation, with a second-order term in the fit that adapts to a larger Q-range.
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