Investigation of low temperature effects on work function based CO2 gas sensing of nanoparticulate CuO films

Tanvir, N.B.; Yurchenko, Olena; Laubender, E.; Urban, G.

doi:10.1016/j.snb.2016.11.020

Cited by 40 publications

(26 citation statements)

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“…The best results were obtained at 50 °C and 45% RH. In both cases, [57] and [76], the highest responses were measured for humidified samples. It was suggested that the presence of humidity and adsorbed water is necessary to achieve the reversible reaction of CO2 with the CuO sensing layer.…”

Section: Carbon Oxidesmentioning

confidence: 96%

“…The sensors were measured under the same conditions as previously, i.e., CO 2 in the 400-4000 ppm range, RH concentrations: 0%, 30%, 45%, 60% and 80%; however, the operating temperature was lower, i.e., 20-110 • C. The best results were obtained at 50 • C and 45% RH. In both cases, [57] and [76], the highest responses were measured for humidified samples. It was suggested that the presence of humidity and adsorbed water is necessary to achieve the reversible reaction of CO 2 with the CuO sensing layer.…”

Section: Ethanol (C2h5oh)mentioning

confidence: 96%

“…It is widely used as a solvent and preservative in pharmaceutical preparations, as well as serving as Carbon dioxide is considered to be a hazardous gas in the atmosphere, whose continuous increase in concentration can lead to adverse effects on human life and the overall environment [75]. The detection of CO 2 by utilization of CuO thin film gas sensors was recently presented by Tanvir et al [57,76]. In [76], the authors presented investigation results of a gas-sensitive layer based on the combination of CuO nanoparticles with an organic binder and zinc peroxide: ZnO 2 .…”

Section: Ethanol (C2h5oh)mentioning

confidence: 99%

“…The obtained results showed that the CuO/ZnO 2 -based (10:1) gas sensor exhibited typical parameters for metal oxide-based sensors. The same group in [57] presented a CuO-based CO 2 detector using CuO nanoparticles. The sensors were measured under the same conditions as previously, i.e., CO 2 in the 400-4000 ppm range, RH concentrations: 0%, 30%, 45%, 60% and 80%; however, the operating temperature was lower, i.e., 20-110 • C. The best results were obtained at 50 • C and 45% RH.…”

Section: Ethanol (C2h5oh)mentioning

confidence: 99%

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The Use of Copper Oxide Thin Films in Gas-Sensing Applications

Rydosz

2018

Coatings

115

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In this work, the latest achievements in the field of copper oxide thin film gas sensors are presented and discussed. Several methods and deposition techniques are shown with their advantages and disadvantages for commercial applications. Recently, CuO thin film gas sensors have been studied to detect various compounds, such as: nitrogen oxides, carbon oxides, hydrogen sulfide, ammonia, as well as several volatile organic compounds in many different applications, e.g., agriculture. The CuO thin film gas sensors exhibited high 3-S parameters (sensitivity, selectivity, and stability). Furthermore, the possibility to function at room temperature with long-term stability was proven as well, which makes this material very attractive in gas-sensing applications, including exhaled breath analysis.

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Section: Carbon Oxidesmentioning

confidence: 96%

Section: Ethanol (C2h5oh)mentioning

confidence: 96%

Section: Ethanol (C2h5oh)mentioning

confidence: 99%

Section: Ethanol (C2h5oh)mentioning

confidence: 99%

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The Use of Copper Oxide Thin Films in Gas-Sensing Applications

Rydosz

2018

Coatings

115

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“…The most prominent class of materials for gas sensing are metal oxide materials, which exhibit high sensitivity towards numerous gases, but in general hardly any to CO 2 . For the following metal oxides a sensitivity to CO 2 has been reported: Gd-doped CeO 2 [13], Pd-doped La 2 O 3 [14], nano-particulate CuO films [15,16] and BaTiO 3 -CuO films [17]. However, up to now no electrical sensor capable to directly detect CO 2 is available as a commercial product.…”

Section: Introductionmentioning

confidence: 99%

CuO Thin Films Functionalized with Gold Nanoparticles for Conductometric Carbon Dioxide Gas Sensing

et al. 2018

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Metal oxides (MOx) are a well-established material for gas sensing. MOx-based gas sensors are sensitive to a wide variety of gases. Furthermore, these materials can be applied for the fabrication of low-cost and -power consumption devices in mass production. The market of carbon dioxide (CO 2 ) gas sensors is mainly dominated by infra-red (IR)-based gas sensors. Only a few MOx materials show a sensitivity to CO 2 and so far, none of these materials have been integrated on CMOS platforms suitable for mass production. In this work, we report a cupric oxide (CuO) thin film-based gas sensor functionalized with gold (Au) nanoparticles, which exhibits exceptional sensitivity to CO 2 . The CuO-based gas sensors are fabricated by electron beam lithography, thermal evaporation and lift-off process to form patterned copper (Cu) structures. These structures are thermally oxidized to form a continuous CuO film. Gold nanoparticles are drop-coated on the CuO thin films to enhance their sensitivity towards CO 2 . The CuO thin films fabricated by this method are already sensitive to CO 2 ; however, the functionalization of the CuO film strongly increases the sensitivity of the base material. Compared to the pristine CuO thin film the Au functionalized CuO film shows at equal operation temperatures (300 ∘ C) an increase of sensitivity towards the same gas concentration (e.g., 2000 ppm CO 2 ) by a factor of 13. The process flow used to fabricate Au functionalized CuO gas sensors can be applied on CMOS platforms in specific post processing steps.

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Carbon Dioxide Detectors based on Al‐ and Ni‐Doped ZnO

Lozano-Rosas

Hernandez

Elizalde-González

et al. 2022

Physica Status Solidi (a)

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Humanity all around the world currently faces two serious challenges: global warming and the COVID-19 pandemic. It is well known that the earth's atmosphere is composed of greenhouse gases that act as a shielding blanket, keeping the global temperature in an optimal range. [1] The three main greenhouse gasses which have presented a significant increment in the course of the industrial period are carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O). [2] CO 2 plays a primary role in global warming because of its production due to a wide range of sources like manufacturing processes, automobiles, human respiration, decomposition, ocean release, etc. [3] In contrast, from December 2019 to date, the COVID-19 pandemic is causing a global impact on every sector of society. [4] One of the strategies of mitigation for the pandemic has been CO 2 concentration monitoring in enclosed spaces to measure indoor ventilation requirements and thus reduce the risk of contagion by the aerosol transmission of the virus. Also, it is clear that CO 2 monitoring has become mandatory to maintain air quality.The values of CO 2 concentration in outdoor ambient air are %400 ppm. [5] Regarding CO 2 concentrations in internal environments, the reality is different depending on the country, specific location, and ventilation system; however, according to the document "Recommendations for operation and maintenance of air conditioning and ventilation systems of buildings and premises for the prevention of the spread of SARS-Cov-2" from Spanish Ministry of Health, for good quality air, it is considered that the concentration of CO 2 in the indoor environment with respect to its concentration in the outdoor environment, should not be higher than 500 ppm. [6] ðCO 2 indoor À CO 2 outdoorÞ < 500 ppm CO 2(1)The first decade of the 21 st century was witness to massive production of sensors, [7] driven principally by the growing concern of global warming. However, new sensing technologies were emerged in the past decade, such as calorimetric sensors (CB), metal-oxide-semiconductor field-effect transistor (MOSFET), conducting polymer sensors, electrochemical sensors (EC), metal-oxide semiconductor (MOS), optical sensors, quartz crystal microbalance (QMB), and surface acoustic wave (SAW). [8] Among these, MOS sensors are mostly investigated, due to their excellent sensitivity, very short response times, low cost, minimal noise, small size, low power consumption for adequate battery life, detection of both oxidizing and reducing gases, easy fabrication, and are excellent candidates for miniaturization with high portability. [9][10][11] There is a wide variety of metal oxides employed for CO 2 detection, including pristine materials:

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Investigation of low temperature effects on work function based CO2 gas sensing of nanoparticulate CuO films

Cited by 40 publications

References 50 publications

The Use of Copper Oxide Thin Films in Gas-Sensing Applications

The Use of Copper Oxide Thin Films in Gas-Sensing Applications

CuO Thin Films Functionalized with Gold Nanoparticles for Conductometric Carbon Dioxide Gas Sensing

Carbon Dioxide Detectors based on Al‐ and Ni‐Doped ZnO

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