Enhanced gas sensing capabilities of diamond layers using Au nanoparticles

0574308 - FZÚ 2024 RIV NL eng J - Journal Article
Kočí, Michal - Szabó, Ondrej - Vanko, G. - Husák, M. - Kromka, Alexander
Enhanced gas sensing capabilities of diamond layers using Au nanoparticles.
Diamond and Related Materials. Roč. 138, Oct (2023), č. článku 110218. ISSN 0925-9635. E-ISSN 1879-0062
R&D Projects: GA MŠMT LM2023051; GA MŠMT(CZ) LUASK22147
Grant - others:AV ČR(CZ) SAV-23-11
Program: Bilaterální spolupráce
Institutional support: RVO:68378271
Keywords : gas sensors * H-terminated NCD (H-NCD) * O-terminated NCD (O-NCD) * gold nanoparticles (Au NPs)
OECD category: Materials engineering
Impact factor: 4.1, year: 2022
Method of publishing: Limited access
https://doi.org/10.1016/j.diamond.2023.110218

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. In this work, the NCD surface modification was achieved by a) layer morphology variation using two different types of chemical vapor deposition (CVD) systems, b) top surface termination, and c) Au nanoparticles (Au NPs). The properties of each structure are measured, compared and subsequently evaluated. The electrical properties are measured for two types of active gas in a temperature range from 22 °C to 125 °C. Neutral synthetic air was applied for flushing and resetting the sensors. Surface morphology greatly influences gas response because a large active surface area enhances interaction with gas molecules. While the termination of the NCD with hydrogen is essential for the functionality of the gas sensor, the Au NPs further enhanced the dynamic response of the sensor and magnitude.
Permanent Link: https://hdl.handle.net/11104/0344652