Effect of light activation on chemical gas sensors based on aligned nanowires

C. Baratto, V. Golovanova, G. Faglia, Thi Thanh Le Dang, H. Hakola, T. Niemi, N. Tkachenko, B. Nazarchurk, V. Golovanov

Tutkimustuotos: KonferenssiartikkeliScientificvertaisarvioitu

Abstrakti

We investigated the effect of light activation on the gas sensors based on aligned nanowires (NWs). Due to almost monocrystalline perfection, NWs exhibit excellent chemical and thermal stability that makes them superior to polycrystalline thin-film sensors. Nanowires were aligned in two different ways: using Langmuir-Blodgett technique on a chip with electrodes being two microns apart, and using hydrothermal growth procedure to obtain inter-crossed nanowires. Our objective was to fabricate multiple aligned nanowire sensors that could mimic the advantages of a single NW sensors, but benefiting from a macroscopic alignment procedure that avoid the use of lithography for making contacts on a single nanowire. In the present study, we investigated the effects of illumination wavelength (sub and supra band-gap) on the sensing capabilities of the developed structures at room temperature. Light activated devices were found effective for NO2 sensing, while no interference to ethanol and relative humidity was observed.

AlkuperäiskieliEnglanti
OtsikkoIEEE Sensors, SENSORS 2020 - Conference Proceedings
KustantajaIEEE
Sivumäärä4
ISBN (elektroninen)9781728168012
ISBN (painettu)9781728168029
DOI - pysyväislinkit
TilaJulkaistu - 2020
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaIEEE SENSORS - Virtual, Rotterdam, Alankomaat
Kesto: 25 lokak. 202028 lokak. 2020

Julkaisusarja

NimiProceedings of IEEE Sensors
Vuosikerta2020-October
ISSN (painettu)1930-0395
ISSN (elektroninen)2168-9229

Conference

ConferenceIEEE SENSORS
Maa/AlueAlankomaat
KaupunkiVirtual, Rotterdam
Ajanjakso25/10/2028/10/20

Julkaisufoorumi-taso

  • Jufo-taso 1

!!ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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