Enhancement of diamond gas sensor responses by gold nanoparticles

0570990 - FZÚ 2024 RIV CZ eng A - Abstrakt
Kočí, Michal - Szabó, Ondrej - Husák, M. - Kromka, Alexander
Enhancement of diamond gas sensor responses by gold nanoparticles.
NANOCON 2022 - Book of Abstracts. Ostrava: Tanger Ltd, 2022 - (Zbořil, R.; Váňová, J.). s. 62-62. ISBN 978-80-88365-07-5.
[International Conference on Nanomaterials - Research & Application /14./ NANOCON. 19.10.2022-21.10.2022, Brno]
Grant ostatní: AV ČR(CZ) SAV-21-10
Program: Bilaterální spolupráce
Institucionální podpora: RVO:68378271
Klíčová slova: gas sensors * nanocrystalline diamond (NCD) * gold nanoparticles (Au NPs)
Obor OECD: Materials engineering

The nanocrystalline diamond (NCD) film reveals a unique combination of physical, chemical, and optoelectronic properties, which makes it a promising material for various sensing applications. Here, we investigated the influence of preparation technology (two types of CVD systems), top-surface termination (oxygen vs hydrogen), and Au nanoparticles on the gas sensing properties of NCD films. The electrical properties (resistance changes) are measured for oxidizing gas NO2, reducing gas NH3, and neutral synthetic air at temperatures varied from room temperature to 125°C. The measured parameters of the tested diamond sensors are compared and subsequently evaluated. The surface morphology is significant for gas sensors, as a larger surface area (higher roughness) increases the response to different gases. While the NCD termination with hydrogen is principally required for the gas sensor functionality, the Au nanoparticles further enhanced the sensor dynamic response and response magnitude.
Trvalý link: https://hdl.handle.net/11104/0342317