title: The stopped-drop method: a novel setup for containment-free and time-resolved measurements.
abstract: A novel setup for containment-free time-resolved experiments at a free-hanging drop is reported. Within a dead-time of 100 ms a drop of mixed reactant solutions is formed and the time evolution of a reaction can be followed from thereon by various techniques. As an example, a small-angle X-ray scattering study on the formation mechanism of EDTA-stabilized CdS both at a synchrotron and a laboratory X-ray source is presented here. While the evolution can be followed with one drop only at a synchrotron source, a stroboscopic mode with many drops is preferable for the laboratory source.
authors.affiliation: Physics Department, Friedrich-Alexander University of Erlangen-Nürnberg, Staudtstraße 3, Erlangen 91058, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Schiener
authors.affiliation: X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA.
authors.forename: Soenke
authors.initials: S
authors.lastname: Seifert
authors.affiliation: Physics Department, Friedrich-Alexander University of Erlangen-Nürnberg, Staudtstraße 3, Erlangen 91058, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Magerl
keywords: SAXS; containment-free; in situ; millisecond time-resolved; sample environment