Positronics of subnanometer atomistic imperfections in solids as a high-informative structure characterization tool

• DOI: 10.1186/s11671-015-0764-z
• Publication Date: 2015-02-17T23:40:25Z
• Authors: Oleh Shpotyuk; Jacek Filipecki; Adam Ingram; Roman Golovchak; Mykola Vakiv; Halyna Klym; Valentyna Balitska; Mykhaylo Shpotyuk; Andrzej Kozdras
• Keywords: Positronium; Nanochemistry; Positron annihilation spectroscopy; Characterization; Formalism (music); Void (composites); Annihilation; Positron Lifetime Spectroscopy

Methodological possibilities of positron annihilation lifetime (PAL) spectroscopy applied to characterize different types nanomaterials treated within three-term fitting procedure are critically reconsidered. In contrast conventional analysis based on admixed positron- and positronium-trapping modes, the process nanostructurization is considered as substitutional positron-positronium trapping same host matrix. Developed formalism allows estimate interfacial void volumes responsible for characteristic bulk lifetimes in nanoparticle-affected inhomogeneous media. This algorithm was well justified at example thermally induced occurring 80GeSe2-20Ga2Se3 glass.