Achieving grazing‐incidence ultra‐small‐angle X‐ray scattering in a laboratory setup. (1st April 2015)

• Record Type: Journal Article
• Authors: Zheng, Nan; Yi, Zhiyong; Li, Zhenzhen; Chen, Ran; Lai, Yuqing; Men, Yongfeng
• Is Part Of: Journal of applied crystallography. Volume 48:Part 2(2015:Apr.)
• Page Start: 608
• Page End: 612
• Publication Date: 2015-04-01
• Subjects: Crystallography -- Periodicals; 548.05
• DOI: 10.1107/S1600576715001752
• Languages: English
• ISSNs: 0021-8898

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>A grazing‐incidence sample stage was designed for realizing grazing‐incidence scattering measurements, especially in the ultra‐small‐angle regime, in a modified Xenocs Xeuss system in the laboratory. The designed sample stage, which is composed of four separate motorized positioning stages, allows the sample to be moved along four different directions to locate it in the proper position for scattering measurement. In an effort to realize grazing‐incidence ultra‐small‐angle scattering (GIUSAXS) measurements, both the separation of the collimation slit systems and the sample‐to‐detector distance have been lengthened. At a separation of the collimation slit systems of 2400 mm and a sample‐to‐detector distance of 6558 mm, the effective smallest scattering vector magnitude <italic>q</italic>_min reaches 0.01 nm⁻¹. A colloidal crystalline thin film obtained from drying a polystyrene latex dispersion on silicon substrate was measured in the setup in GIUSAXS mode at different beam sizes. The resultant GIUSAXS patterns at smaller beam sizes reveal fine crystalline structures in the film.</p> </abstract>