Environmental control for X‐ray nanotomography. (21st July 2022)

• Record Type: Journal Article
• Authors: Holler, Mirko; Aidukas, Tomas; Heller, Lars; Appel, Christian; Phillips, Nicholas W.; Müller-Gubler, Elisabeth; Guizar-Sicairos, Manuel; Raabe, Jörg; Ihli, Johannes
• Is Part Of: Journal of synchrotron radiation. Volume 29:Part 5(2022)
• Page Start: 1223
• Page End: 1231
• Publication Date: 2022-07-21
• Subjects: in situ nano‐tomography -- ptychographic tomography -- ptychography -- environmental control; Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577522006968
• Languages: English
• ISSNs: 0909-0495

Abstract

Abstract : An environmental control system for in situ or operando nanotomography is presented. It allows controlling the sample temperature from room temperature to 850°C under controlled gas compositions, and a 3D isotropic resolution of sub‐20 nm at a temperature of 600°C is demonstrated. Abstract : The acquisition speed and spatial resolution of X‐ray nanotomography have continuously improved over the last decades. Coherent diffraction‐based techniques breach the 10 nm resolution barrier frequently and thus pose stringent demands on sample positioning accuracy and stability. At the same time there is an increasing desire to accommodate in situ or operando measurements. Here, an environmental control system for X‐ray nanotomography is introduced to regulate the temperature of a sample from room temperature up to 850°C in a controlled atmospheric composition. The system allows for a 360° sample rotation, permitting tomographic studies in situ or operando free of missing wedge constraints. The system is implemented and available at the flOMNI microscope at the Swiss Light Source. In addition to the environmental control system itself, the related modifications of flOMNI are described. Tomographic measurements of a nanoporous gold sample at 50°C and 600°C at a resolution of sub‐20 nm demonstrate the performance of the device.