A thick-film impedancemetric carbon monoxide sensor using layered perovskite-type cuprate

Yamamoto, Shinyu; Takase, Satoko

doi:10.1016/j.snb.2017.04.059

Cited by 11 publications

(5 citation statements)

References 37 publications

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“…The structure of an impedance gas sensor based on an La 1.9 Ce 0.1 CuO 4 oxide film is shown in figure 13. The thickfilm device responded well to CO between 50 and 600 ppm at 400 °C-500 °C and 50 Hz [64].…”

Section: Resistor-type Gas Sensorsmentioning

confidence: 97%

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Gas sensing devices based on two-dimensional materials: a review

Wang

Chen

et al. 2022

Nanotechnology

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Gas sensors have been widely utilized penetrating every aspect of our daily lives, such as medical industry, environmental safety testing, and the food industry. In recent years, two-dimensional (2D) materials have shown promising potential and prominent advantages in gas sensing technology, due to their unique physical and chemical properties. In addition, the ultra-high surface-to-volume ratio and surface activity of the 2D materials with atomic-level thickness enables enhanced absorption and sensitivity. Till now, different gas sensing techniques have been developed to further boost the performance of 2D materials-based gas sensors, such as various surface functionalization and Van der Waals heterojunction formation. In this article, a comprehensive review of advanced gas sensing devices is provided based on 2D materials, focusing on two sensing principles of charge-exchange and surface oxygen ion adsorption. Six types of typical gas sensor devices based on 2D materials are introduced with discussion of latest research progress and future perspectives.

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Section: Resistor-type Gas Sensorsmentioning

confidence: 97%

“…The change in the complex impedance reflects the change in the concentration of a specific gas species in a quantitative manner [62]. At present, impedance gas sensors have been used to detect various gases such as NO [63], CO [64], NOx [65], and H 2 O [66].…”

Section: Resistor-type Gas Sensorsmentioning

confidence: 99%

Gas sensing devices based on two-dimensional materials: a review

Wang

Chen

et al. 2022

Nanotechnology

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“…For instance, Shimizu et al have increased the CO sensitivity by introducing perovskite-type oxides on gold interdigitated electrodes on an Al 2 O 3 substrate. These sensors showed the disadvantage of optimum operating at temperatures of 400 °C [ 28 ]. Thus, the use of a co-dopant such as ferrocene (Fc) or ferrocenyl derivatives has been shown to be a method that could improve the response to monoxides at room temperature [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

A New Hybrid Sensitive PANI/SWCNT/Ferrocene-Based Layer for a Wearable CO Sensor

Savin

Mihailescu

Avramescu

et al. 2021

Sensors

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Developing a sensing layer with high electroactive properties is an important aspect for proper functionality of a wearable sensor. The polymeric nanocomposite material obtained by a simple electropolymerization on gold interdigitated electrodes (IDEs) can be optimized to have suitable conductive properties to be used with direct current (DC) measurements. A new layer based on polyaniline:poly(4-styrenesulfonate) (PANI:PSS)/single-walled carbon nanotubes (SWCNT)/ferrocene (Fc) was electrosynthesized and deposed on interdigital transducers (IDT) and was characterized in detail using electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), scanning electron microscopy (SEM), Raman spectroscopy, X-ray photoemission spectroscopy (XPS), and X-ray diffraction (XRD). The sensor characteristics of the material towards carbon monoxide (CO) in the concentration range of 10–300 ppm were examined, showing a minimal relative humidity interference of only 1% and an increase of sensitivity with the increase of CO concentration. Humidity interference could be controlled by the number of CV cycles when a compact layer was formed and the addition of Fc played an important role in the decrease of humidity. The results for CO detection can be substantially improved by optimizing the number of deposition cycles and enhancing the Fc concentration. The material was developed for selective detection of CO in real environmental conditions and shows good potential for use in a wearable sensor.

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“…However, we cannot detect CO, which is odorless and colorless, by ourselves, and thus highly sensitive and selective CO sensors are quite essential in detecting even a low concentration of CO quickly and accurately, and then in preventing inhalation of CO into lung through the respiratory system. Among various types of CO sensors [2][3][4][5][6], electrochemical gas sensors using cation-conducting polymer (such as Nafion ® ) as an electrolyte material, which can be operated at RT, have also been attractive as a high performance CO sensor [7][8][9][10][11][12][13], and some types of electrochemical CO sensors are presently commercialized all over the world [14]. On the other hand, anion-conducting polymers (ACP) with large OH − conductivity and improved long-term stability [15][16][17] are also quite attractive as an electrolyte material alternative to cation-conducting polymers, because most of metal oxides are relatively stable in alkaline media.…”

Section: Introductionmentioning

confidence: 99%