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Search results for: light-assisted gas sensing

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Search results for: light-assisted gas sensing

  • Zespół Metrologii i Optoelektroniki

    * komputerowo wspomagana metrologia i diagnostyka * projektowanie systemów * mikrosystemów i makrosystemów elektronicznych * testowanie i diagnostyka elektroniczna * pomiary właściwości szumowych i zakłóceń * spektroskopia impedancyjna * telemetria i telediagnostyka internetowa * katedra redaguje Metrology and Measurement Systems * kwartalnik PAN znajdujący się na liście JCR

  • Katedra Elektrochemii, Korozji i Inżynierii Materiałowej

    Badania realizowane przez pracowników Katedry obejmują w szczególności: zjawiska i procesy elektrochemiczne, podstawy korozji i zabezpieczenie przed korozją, inżynierię materiałowa, fizykochemię powierzchni. W Katedrze Elektrochemii, Korozji i Inżynierii Materiałowej realizowanych jest szereg kierunków związanych z badaniami podstawowymi jak i techniczno-technologicznymi. Głównymi obszarami działalności naukowej są: badania mechanizmu...

  • Zespół Fizyki Ciała Stałego

    Tematyka badawcza Katedry Fizyki Ciała Stałego obejmuje wytwarzanie i badanie materiałów dla energetyki (m.in. nanostruktury, sensory) o innowacyjnych właściwościach fizyko-chemicznych, tj: * kryształy, polikryształy, ceramika, szkło * materiały objętościowe, cienkie warstwy, nanomateriały * materiały metaliczne, półprzewodnikowe, nadprzewodnikowe, izolatory Tematyka badawcza obejmuje również badania symulacyjne i obliczeniowe...

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Search results for: light-assisted gas sensing

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Search results for: light-assisted gas sensing

  • UV-Light-Induced Fluctuation Enhanced Sensing by WO3-Based Gas Sensors

    Publication
    • M. Trawka
    • J. Smulko
    • L. Hasse
    • C. Granqvist
    • R. Ionescu
    • E. Llobet
    • F. E. Annanouch
    • L. B. Kish

    - IEEE SENSORS JOURNAL - Year 2016

    WO3-based gas sensors were investigated under UV-light irradiation and at different working temperatures with the object of achieving superior sensitivity and selectivity. Resistance fluctuations in the WO3 layer were studied together with dc resistance measurements. The data were taken in synthetic air, ethanol, nitrogen dioxide, and mixtures of these gases. We conclude that UV irradiation can easily be applied to enhance the...

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  • Optimum Choice of Randomly Oriented Carbon Nanotube Networks for UV-Assisted Gas Sensing Applications

    Publication
    • K. Drozdowska
    • A. Rehman
    • J. Smulko
    • A. Krajewska
    • B. Stonio
    • P. Sai
    • A. Przewłoka
    • M. Filipiak
    • K. Pavłov
    • G. Cywinski... and 2 others

    - ACS Sensors - Year 2023

    We investigated the noise and photoresponse characteristics of various optical transparencies of nanotube networks to identify an optimal randomly oriented network of carbon nanotube (CNT)-based devices for UV-assisted gas sensing applications. Our investigation reveals that all of the studied devices demonstrate negative photoconductivity upon exposure to UV light. Our studies confirm the effect of UV irradiation on the electrical...

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  • Fluctuation enhanced gas sensing with WO3-based nanoparticle gas sensors modulated by UV light at selected wavelengths

    Publication

    - SENSORS AND ACTUATORS B-CHEMICAL - Year 2016

    The sensitivity and selectivity of WO3-based gas sensors can be enhanced by UV-irradiation-induced modulation, especially if different wavelengths are employed. We used fluctuation-enhanced gas sensing, based on measurements of resistance fluctuations in the gas sensor, to study the effects of such modulation on the noise intensity for ambient atmospheres of synthetic air without and with additions of small amounts of ethanol,...

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  • Effects of UV light irradiation on fluctuation enhanced gas sensing by carbon nanotube networks

    Publication

    - SENSORS AND ACTUATORS B-CHEMICAL - Year 2022

    The exceptionally large active surface-to-volume ratio of carbon nanotubes makes it an appealing candidate for gas sensing applications. Here, we studied the DC and low-frequency noise characteristics of a randomly oriented network of carbon nanotubes under NO2 gas atmosphere at two different wavelengths of the UV light-emitting diodes. The UV irradiation allowed to sense lower concentrations of NO2 (at least 1 ppm) compared to...

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  • UV Light-Modulated Fluctuation-Enhanced Gas Sensing by Layers of Graphene Flakes/TiO2 Nanoparticles

    Publication

    - Journal of Sensors - Year 2020

    We present experimental results of fluctuation-enhanced gas sensing by low-cost resistive sensors made of a mixture of graphene flakes and TiO2 nanoparticles. Both components are photocatalytic and activated by UV light. Two UV LEDs of different wavelengths (362 and 394 nm) were applied to modulate the gas sensing of the layers. Resistance noise was recorded at low frequencies, between 8 Hz and 10 kHz. The sensors’ response was...

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