A dilute gold nanoparticles suspension as SAXS standard for absolute scale using an extended Guinier approximation
Ahmed S. A. Mohammed, Agnese Carino, Andrea Testino, Mohamed, Reza Andalibi, Antonio Cervellino
TL;DR
This paper presents a practical method for absolute intensity calibration in SAXS using dilute gold nanoparticle suspensions and an extended Guinier approximation to improve accuracy over a wider q-range.
Contribution
It introduces a novel calibration procedure employing an extended Guinier approximation for more precise SAXS intensity scaling.
Findings
Effective calibration standard using gold nanoparticles.
Extended Guinier approximation improves extrapolation accuracy.
Applicable to liquid microjet SAXS measurements.
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 of the SAXS scattering curve would provide a scaling reference. In order to get the most precise extrapolation at , we used an extension to the Guinier approximation, with a second-order term in the fit that adapts to a larger -range.
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