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Positron annihilation study of cavities in black Au films
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SYSNO ASEP 0476823 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Positron annihilation study of cavities in black Au films Author(s) Melikhova, O. (CZ)
Čízek, J. (CZ)
Hruška, P. (CZ)
Vlček, M. (CZ)
Procházka, I. (CZ)
Anwand, W. (DE)
Novotný, Michal (FZU-D) RID, ORCID, SAI
Bulíř, Jiří (FZU-D) RID, ORCID, SAINumber of authors 8 Article number 012018 Source Title Journal of Physics: Conference series, 791. - Bristol : IOP Publishing Ltd., 2017 - ISSN 1742-6588 Pages s. 1-4 Number of pages 4 s. Publication form Print - P Action International Workshop on Slow Positron Beam Techniques and Applications /14./ (SLOPOS 2016) Event date 22.05.2016 - 27.05.2016 VEvent location Kunibiki MesseMatsue Country JP - Japan Event type WRD Language eng - English Country GB - United Kingdom Keywords black gold ; porous metal ; evaporation ; positron annihilation spectroscopy Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GBP108/12/G043 GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000400610500018 EID SCOPUS 85016078833 DOI 10.1088/1742-6596/791/1/012018 Annotation Defects in a black Au film were studied using variable energy positron annihilation spectroscopy. Black Au films exhibit porous morphology similar to cauliflower. This type of structure enhances the optical absorption due to a multiple reflections in the micro-cavities. A nanostructured black Au film was compared with conventional smooth Au films with high reflectivity. The black Au film exhibited a remarkably enhanced S-parameter in sub-surface region. This is caused by a narrow para-Positronium contribution to the annihilation peak. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2018
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