Effects of Au Addition on the Performance of Thermal Electronic Noses Based on Porous Cu2O–SnO2 Nanospheres DOI Creative Commons
Matteo Tonezzer, Taro Ueda,

Soichiro Torai

et al.

Nanomaterials, Journal Year: 2024, Volume and Issue: 14(24), P. 2052 - 2052

Published: Dec. 22, 2024

The electronic nose is an increasingly useful tool in many fields and applications. Our thermal approach, based on nanostructured metal oxide chemiresistors a gradient, has the advantage of being tiny therefore integrable portable wearable devices. Obviously, wise choice nanomaterial crucial for device’s performance should be carefully considered. Here we show how addition different amounts Au (between 1 5 wt%) Cu2O–SnO2 nanospheres affects performance. Interestingly, best not achieved with material offering highest intrinsic selectivity. This confirms importance specific studies, since chemoresistive gas sensors does linearly affect nose. By optimizing amount Au, device perfect classification tested gases (acetone, ethanol, toluene) good concentration estimation (with mean absolute percentage error around 16%). These performances, combined potentially smaller dimensions less than 0.5 mm2, make this ideal candidate numerous applications, such as agri-food, environmental, biomedical sectors.

Language: Английский

ZnO/MOx Nanofiber Heterostructures: MOx Receptor’s Role in Gas Detection DOI Creative Commons
Vadim Platonov, Оleg G. Sinyashin, M. N. Rumyantseva

et al.

Sensors, Journal Year: 2025, Volume and Issue: 25(2), P. 376 - 376

Published: Jan. 10, 2025

ZnO/MOx (M = FeIII, CoII,III, NiII, SnIV, InIII, GaIII; [M]/([Zn] + [M]) 15 mol%) nanofiber heterostructures were obtained by co-electrospinning and characterized X-ray diffraction, scanning electron microscopy fluorescence spectroscopy. The sensor properties of ZnO nanofibers studied toward reducing gases CO (20 ppm), methanol acetone oxidizing gas NO2 (1 ppm) in dry air. It was demonstrated that the temperature maximum response is primarily influenced binding energy chemisorbed oxygen with surface modifier's oxides. When detecting NO2, high sensitivity at a low measurement can be achieved concentration free electrons near-surface layer zinc oxide grains, which determined band bending interface difference work function MOx.

Language: Английский

Citations

2
Fabrication and Characterization of MWCNTs Decorated ZnO Nanograins Based Sensor for Enhanced Performance Toward CO2 Gas DOI Creative Commons
M. S. Aleksanyan, Artak Sayunts, Gevorg Shahkhatuni

et al.

Advanced Materials Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

Abstract In this study, a zinc oxide sputtering target is synthesized and nanostructured ZnO film obtained using simple solid‐state reaction RF (radio frequency) magnetron methods, respectively. The surface of the functionalized by saturating it with MWCNTs (multi‐walled carbon nanotubes) electron‐beam deposition method to produce high‐performance CO 2 sensor. ‐sensitive material subjected multifaceted structural, morphological, crystallographic, elemental studies thickness measurement profiler as well scanning electron (SEM), transmission (TEM) microscopies, energy dispersive X‐ray (EDX), photoelectron (XPS), Fourier transform infrared (FTIR) spectroscopies. sensing characteristics ZnO/MWCNTs resistive sensor designed onto multi‐sensor platform are carefully studied in temperature range 25–250 °C without UV (ultraviolet) irradiation. 150 irradiation confirmed preferable operating point where response values swiped from 2.5 5.7 corresponding concentration 100–5000 ppm, respectively, reproducible appearance real‐time curves. high performance ZnO/MWCNT makes likely candidate for successful incorporation into detectors.

Language: Английский

Citations

0
Effects of Au Addition on the Performance of Thermal Electronic Noses Based on Porous Cu2O–SnO2 Nanospheres DOI Creative Commons
Matteo Tonezzer, Taro Ueda,

Soichiro Torai

et al.

Nanomaterials, Journal Year: 2024, Volume and Issue: 14(24), P. 2052 - 2052

Published: Dec. 22, 2024

The electronic nose is an increasingly useful tool in many fields and applications. Our thermal approach, based on nanostructured metal oxide chemiresistors a gradient, has the advantage of being tiny therefore integrable portable wearable devices. Obviously, wise choice nanomaterial crucial for device’s performance should be carefully considered. Here we show how addition different amounts Au (between 1 5 wt%) Cu2O–SnO2 nanospheres affects performance. Interestingly, best not achieved with material offering highest intrinsic selectivity. This confirms importance specific studies, since chemoresistive gas sensors does linearly affect nose. By optimizing amount Au, device perfect classification tested gases (acetone, ethanol, toluene) good concentration estimation (with mean absolute percentage error around 16%). These performances, combined potentially smaller dimensions less than 0.5 mm2, make this ideal candidate numerous applications, such as agri-food, environmental, biomedical sectors.

Language: Английский

Citations

0