Microwave system with sensor utilizing GO-based gas-sensitive layer and its application to acetone detection

Staszek, Kamil; Szkudlarek, Aleksandra; Kawa, M.; Rydosz, Artur

doi:10.1016/j.snb.2019.126699

Cited by 28 publications

(13 citation statements)

References 68 publications

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“…So far, different gas sensors such as field-effect transistors (FETs) [32], optical [33], electrochemical [34], surface acoustic wave [35], cataluminescence [36], microwave-based [37], quartz crystal microbalance [3], microcantilever [38] mixed potential [39,40], photonic waveguide [41], and resistive-based [42,43] have been introduced in the literature.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Amiri

Roshan

Mirzaei

et al. 2020

Sensors

185

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Acetone is a well-known volatile organic compound that is widely used in different industrial and domestic areas. However, it can have dangerous effects on human life and health. Thus, the realization of sensitive and selective sensors for recognition of acetone is highly important. Among different gas sensors, resistive gas sensors based on nanostructured metal oxide with high surface area, have been widely reported for successful detection of acetone gas, owing to their high sensitivity, fast dynamics, high stability, and low price. Herein, we discuss different aspects of metal oxide-based acetone gas sensors in pristine, composite, doped, and noble metal functionalized forms. Gas sensing mechanisms are also discussed. This review is an informative document for those who are working in the field of gas sensors.

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Section: Introductionmentioning

confidence: 99%

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Amiri

Roshan

Mirzaei

et al. 2020

Sensors

185

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“…As was shown in [30], the above described SnO 2 layer changes its permittivity in the microwave frequency range when exposed to acetone. This phenomenon has been used for indirect acetone concentration measurement with the use of the microwave measurement system reported in [37], operating at a frequency of 2.4 GHz. This system is composed of a microwave sensor with the SnO 2 as a gas-sensing layer and a dedicated five-port reflectometer for measuring the sensor’s response.…”

Section: Methodsmentioning

confidence: 99%

“…As a result, such a sensor configuration doubles the impact of the permittivity change on the measured reflection coefficient. To obtain good measurement quality, the reflection coefficient measurement was realized with the use of the recently developed five-port reflectometer [37]. It exhibited significantly enhanced measurement uncertainty for the reflection coefficient’s range, corresponding to the utilized sensor’s reflection coefficient (magnitude equal to 0.8 ± 0.2 and phase equal to 180° ± 15°) [37], with respect to the classic reflectometers optimized for all reflection coefficients (magnitude not exceeding 1, arbitrary phase).…”

Section: Methodsmentioning

confidence: 99%

“…To obtain good measurement quality, the reflection coefficient measurement was realized with the use of the recently developed five-port reflectometer [37]. It exhibited significantly enhanced measurement uncertainty for the reflection coefficient’s range, corresponding to the utilized sensor’s reflection coefficient (magnitude equal to 0.8 ± 0.2 and phase equal to 180° ± 15°) [37], with respect to the classic reflectometers optimized for all reflection coefficients (magnitude not exceeding 1, arbitrary phase). It consisted of a five-port passive power distribution network, signal source, and three microwave power detectors, the readings of which were translated to the measured complex reflection coefficient.…”

Section: Methodsmentioning

confidence: 99%

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Tin Dioxide Thin Film with UV-enhanced Acetone Detection in Microwave Frequency Range

et al. 2019

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In this paper, the UV illumination effect for microwave gas sensors based on the tin dioxide was verified. A UV LED with emission wavelength close to the absorption edge of the SnO2 gas-sensing layer was selected as the UV source. The developed gas sensors were tested under exposure to acetone in the 0–200 ppm range at room temperature. The sensor’s complex reflection coefficient corresponding to target gas concentration was measured with the use of a five-port reflectometer system exhibiting enhanced uncertainty distribution, which allows for the detection of low gas concentration. The UV illumination significantly emphasizes the sensors’ response in terms of both magnitude and phase for low gas concentrations, in contrast to previously reported results, in which only the reflection coefficient’s phase was affected. The highest responses were obtained for modulated UV illumination.

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“…In this paper, the investigation provides results on copper oxides deposited by a commercially available glancing angle deposition system (most papers present only the investigation on homemade GLAD manipulators, which reduce the possibility of repeating the results) at various conditions. The deposited thin films were used as gas-sensitive layers for sub-ppm acetone detection, which is recognized to be a biomarker of diabetes present in the breath [51][52][53][54][55][56].…”

Section: Introductionmentioning

confidence: 99%

GLAD Magnetron Sputtered Ultra-Thin Copper Oxide Films for Gas-Sensing Application

et al. 2020

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Copper oxide (CuO) ultra-thin films were obtained using magnetron sputtering technology with glancing angle deposition technique (GLAD) in a reactive mode by sputtering copper target in pure argon. The substrate tilt angle varied from 45 to 85° and 0°, and the sample rotation at a speed of 20 rpm was stabilized by the GLAD manipulator. After deposition, the films were annealed at 400 °C/4 h in air. The CuO ultra-thin film structure, morphology, and optical properties were assessed by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), X-ray reflectivity (XRR), and optical spectroscopy. The thickness of the films was measured post-process using a profilometer. The obtained copper oxide structures were also investigated as gas-sensitive materials after exposure to acetone in the sub-ppm range. After deposition, gas-sensing measurements were performed at 300, 350, and 400 °C and 50% relative humidity (RH) level. We found that the sensitivity of the device is related to the thickness of CuO thin films, whereas the best results are obtained with an 8 nm thick sample.

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Microwave system with sensor utilizing GO-based gas-sensitive layer and its application to acetone detection

Cited by 28 publications

References 68 publications

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Tin Dioxide Thin Film with UV-enhanced Acetone Detection in Microwave Frequency Range

GLAD Magnetron Sputtered Ultra-Thin Copper Oxide Films for Gas-Sensing Application

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