A novel X‐ray diffractometer for studies of liquid–liquid interfaces. (1st January 2014)

• Record Type: Journal Article
• Authors: Murphy, Bridget M.; Greve, Matthais; Runge, Benjamin; Koops, Christian T.; Elsen, Annika; Stettner, Jochim; Seeck, Oliver H.; Magnussen, Olaf M.
• Is Part Of: Journal of synchrotron radiation. Volume 21:Part 1(2014)
• Page Start: 45
• Page End: 56
• Publication Date: 2014-01-01
• Subjects: Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577513026192
• Languages: English
• ISSNs: 0909-0495

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The study of liquid–liquid interfaces with X‐ray scattering methods requires special instrumental considerations. A dedicated liquid surface diffractometer employing a tilting double‐crystal monochromator in Bragg geometry has been designed. This diffractometer allows reflectivity and grazing‐incidence scattering measurements of an immobile mechanically completely decoupled liquid sample, providing high mechanical stability. The available energy range is from 6.4 to 29.4 keV, covering many important absorption edges. The instrument provides access in momentum space out to 2.54 Å⁻¹ in the surface normal and out to 14.8 Å⁻¹ in the in‐plane direction at 29.4 keV. Owing to its modular design the diffractometer is also suitable for heavy apparatus such as vacuum chambers. The instrument performance is described and examples of X‐ray reflectivity studies performed under <italic>in situ</italic> electrochemical control and on biochemical model systems are given.</p> </abstract>