Development of a gas environmental heating specimen holder system using differential pumping. (15th June 2021)

• Record Type: Journal Article
• Authors: Hashimoto, Ayako; Han, Yutain; Akimoto, Hajime; Hozumi, Ryo; Takeguchi, Masaki
• Is Part Of: Microscopy. Volume 70:Number 6(2021)
• Page Start: 545
• Page End: 549
• Publication Date: 2021-06-15
• Subjects: in situ observation -- TEM specimen holder -- gas environment -- high temperature -- differential pumping; Microscopy -- Periodicals; 502.825
• DOI: 10.1093/jmicro/dfab019
• Languages: English
• ISSNs: 2050-5698

Abstract

Abstract: We developed a gas environmental heating specimen holder system by applying differential pumping effect to a specimen holder for the in situ transmission electron microscopy observation and electron energy loss spectroscopy (EELS) analysis of catalytic materials. In the in situ experiments, using two small orifices and O-rings, the maximum formed gas pressure was ∼20 Pa. Also, using a heater membrane, the maximum obtained heating temperature was ∼1000°C. We could actually observe/analyze the Pt and Ni nanoparticles with an atomic scale using a double-aberration-corrected microscope and an EELS instrument in the reaction gases at high temperatures.