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Platinum Based Nanoparticles Produced by a Pulsed Spark Discharge as a Promising Material for Gas Sensors

Authors :
Ivan A. Volkov
Nikolay P. Simonenko
Alexey A. Efimov
Tatiana L. Simonenko
Ivan S. Vlasov
Vladislav I. Borisov
Pavel V. Arsenov
Yuri Yu. Lebedinskii
Andrey M. Markeev
Anna A. Lizunova
Artem S. Mokrushin
Elizaveta P. Simonenko
Vadim A. Buslov
Andrey E. Varfolomeev
Zhifu Liu
Alexey A. Vasiliev
Victor V. Ivanov
Source :
Applied Sciences, Vol 11, Iss 2, p 526 (2021)
Publication Year :
2021
Publisher :
MDPI AG, 2021.

Abstract

We have applied spark ablation technology for producing nanoparticles from platinum ingots (purity of 99.97 wt. %) as a feed material by using air as a carrier gas. A maximum production rate of about 400 mg/h was achieved with an energy per pulse of 0.5 J and a pulse repetition rate of 250 Hz. The synthesized nanomaterial, composed of an amorphous platinum oxide PtO (83 wt. %) and a crystalline metallic platinum (17 wt. %), was used for formulating functional colloidal ink. Annealing of the deposited ink at 750 °C resulted in the formation of a polycrystalline material comprising 99.7 wt. % of platinum. To demonstrate the possibility of application of the formulated ink in printed electronics, we have patterned conductive lines and microheaters on alumina substrates and 20 μm thick low-temperature co-fired ceramic (LTCC) membranes with the use of aerosol jet printing technology. The power consumption of microheaters fabricated on LTCC membranes was found to be about 140 mW at a temperature of the hot part of 500 °C, thus allowing one to consider these structures as promising micro-hotplates for metal oxide semiconductor (MOS) gas sensors. The catalytic activity of the synthesized nanoparticles was demonstrated by measuring the resistance transients of the non-sintered microheaters upon exposure to 2500 ppm of hydrogen.

Details

Language :
English
ISSN :
20763417
Volume :
11
Issue :
2
Database :
Directory of Open Access Journals
Journal :
Applied Sciences
Publication Type :
Academic Journal
Accession number :
edsdoj.6b01fe016a09432db0814f8366fb0602
Document Type :
article
Full Text :
https://doi.org/10.3390/app11020526