Study of nanoscopic porosity in black metals by positron annihilation spectroscopy

0525001 - FZÚ 2021 RIV PL eng J - Journal Article
Melikhova, O. - Čízek, J. - Hruška, P. - Liedke, M.O. - Butterling, M. - Wagner, A. - Novotný, Michal - More Chevalier, Joris
Study of nanoscopic porosity in black metals by positron annihilation spectroscopy.
Acta physica Polonica. B. Roč. 51, č. 1 (2020), s. 383-387. ISSN 0587-4254. E-ISSN 1509-5770
R&D Projects: GA ČR GA18-09347S
Institutional support: RVO:68378271
Keywords : black metal film * positron annihilation spectroscopy * magnetron sputtering
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 0.748, year: 2020
Method of publishing: Open access

Black and smooth Al films were characterized by the variable energy positron annihilation spectroscopy (VEPAS). It was found that in smooth films positronium (Ps) is formed on the surface only while in black metal films, it is formed also in nanoscopic pores inside the film. The mean pore size increases from the substrate to the surface due to increasing film roughness.
Permanent Link: http://hdl.handle.net/11104/0309204