Details

Autor(en) / Beteiligte

• Melikhova, O
• í ek, J
• Hruška, P
• Vl ek, M
• Procházka, I
• Anwand, W
• Novotný, M
• Bulí, J

Titel

Positron annihilation study of cavities in black Au films

Ist Teil von

• Journal of physics. Conference series, 2017-01, Vol.791 (1), p.12018

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2017

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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.