Emergence of dark ZnO nanorods by hydrogen plasma treatment

0557522 - FZÚ 2023 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Remeš, Zdeněk - Buryi, Maksym - Sharma, Dhananjay K. - Artemenko, Anna - Mičová, J. - Rezek, B. - Poruba, A. - Hsu, H.S. - Potocký, Štěpán - Babin, Vladimir
Emergence of dark ZnO nanorods by hydrogen plasma treatment.
NANOCON 2021 - Conference proceedings. Ostrava: Tanger Ltd., 2021, s. 424-429. ISBN 978-80-88365-00-6. ISSN 2694-930X.
[International Conference on Nanomaterials - Research & Application /13./ NANOCON. Brno (CZ), 20.10.2021-22.10.2021]
Grant CEP: GA MŠMT(CZ) EF16_019/0000760; GA ČR GC19-02858J
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760; AV ČR(CZ) SAV-21-09; AV ČR(CZ) StrategieAV21/6
Program: Bilaterální spolupráce; StrategieAV
Výzkumná infrastruktura: CzechNanoLab - 90110
Institucionální podpora: RVO:68378271
Klíčová slova: ZnO * ICP * photoluminescence
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
https://www.confer.cz/nanocon/2021/download/4374-emergence-of-dark-zno-nanorods-by-hydrogen-plasma-treatment.pdf

We employed a custom-built inductively coupled plasma (ICP) 13.56 MHz reactor with up to 300 W RF discharge power. Hydrothermally grown ZnO nanorods were exposed to the ICP plasma with a mixture of hydrogen and argon for up to 30 min, followed in-situ by plasma oxidation. Plasma properties were monitored by optical emission spectroscopy (OES) and by measuring the self-bias potential of the stainless steel sample holder separated from the ground by a blocking capacitor. The exciton-related UV photoluminescence of ZnO nanorods and optical absorption increases significantly after the plasma treatment. We attribute it to the complex changes of ZnO surface electronic states that also give rise to its black color visually.
Trvalý link: http://hdl.handle.net/11104/0331491