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

Methodological possibilities of positron annihilation lifetime (PAL) spectroscopy applied to characterize different types of nanomaterials treated within three-term fitting procedure are critically reconsidered. In contrast to conventional three-term analysis based on admixed positron- and positroni...

Descripción completa

Detalles Bibliográficos
Autores principales: Shpotyuk, Oleh, Filipecki, Jacek, Ingram, Adam, Golovchak, Roman, Vakiv, Mykola, Klym, Halyna, Balitska, Valentyna, Shpotyuk, Mykhaylo, Kozdras, Andrzej
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2015
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4385039/
https://www.ncbi.nlm.nih.gov/pubmed/25852373
http://dx.doi.org/10.1186/s11671-015-0764-z
Descripción
Sumario:Methodological possibilities of positron annihilation lifetime (PAL) spectroscopy applied to characterize different types of nanomaterials treated within three-term fitting procedure are critically reconsidered. In contrast to conventional three-term analysis based on admixed positron- and positronium-trapping modes, the process of nanostructurization is considered as substitutional positron-positronium trapping within the same host matrix. Developed formalism allows estimate interfacial void volumes responsible for positron trapping and characteristic bulk positron lifetimes in nanoparticle-affected inhomogeneous media. This algorithm was well justified at the example of thermally induced nanostructurization occurring in 80GeSe(2)-20Ga(2)Se(3) glass.

Ejemplares similares