Deposition of Polymer Sensor Films on SAW Surface by Electrospraying Technology

Jasek, K.; Pasternak, M.; Grabka, Michał; Neffe, S.; Zasada, D.

doi:10.1515/aoa-2017-0054

Cited by 5 publications

(4 citation statements)

References 30 publications

(27 reference statements)

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“…Furthermore, selecting the proper coating technique is another essential factor for optimizing performance characteristics. JASEK et al [ 58 ] characterized the humidity sensing properties of Nafion ® film deposited with two different techniques, i.e., thermal evaporation and electrospraying. The film deposited by the vacuum evaporation method agglomerated into bubbles, while the electrospray-deposited film was uniform.…”

Section: Sensing Materialsmentioning

confidence: 99%

Surface Acoustic Wave Humidity Sensor: A Review

et al. 2023

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The Growing demands for humidity detection in commercial and industrial applications led to the rapid development of humidity sensors based on different techniques. Surface acoustic wave (SAW) technology is one of these methods that has been found to provide a powerful platform for humidity sensing owing to its intrinsic features, including small size, high sensitivity, and simple operational mechanism. Similar to other techniques, the principle of humidity sensing in SAW devices is also realized by an overlaid sensitive film, which serves as the core element whose interaction with water molecules is responsible for overall performance. Therefore, most researchers are focused on exploring different sensing materials to achieve optimum performance characteristics. This article reviews sensing materials used to develop SAW humidity sensors and their responses based on theoretical aspects and experimental outcomes. Herein the influence of overlaid sensing film on the performance parameters of the SAW device, such as quality factor, signal amplitude, insertion loss, etc., is also highlighted. Lastly, a recommendation to minimize the significant change in device characteristics is presented, which we believe will be a good step for the future development of SAW humidity sensors.

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Section: Sensing Materialsmentioning

confidence: 99%

Surface Acoustic Wave Humidity Sensor: A Review

et al. 2023

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“…It is worth mentioning that filter absorbers do not neutralize toxic substances, but only filter and adsorb them. Therefore, technical conditions have been developed for each type of filter absorber; they contain operational and protective requirements, including permissible air flow resistance, sorption capacity, and protection time for selected substances, taking into account their type (acidic, alkaline, or organic/inorganic) [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Air Pollution and Radiation Monitoring in Collective Protection Facilities

Kołacz

Wiśnik-Sawka

Maziejuk

et al. 2023

Sensors

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It has become increasingly important to monitor environment contamination by such chemicals as chemical warfare agents (CWAs) and industrial toxic chemicals (TICs), as well as radiation hazards around and inside collective protection facilities. This is especially important given the increased risk of terrorist or military attacks. The Military Institute of Chemistry and Radiometry (MICR) has constructed and developed the ALERT device for the effective monitoring of these threats. This device uses sensors that detect chemical and radiological contaminations in the air. The CWA detector is an ion mobility spectrometer, TICs are detected by electrochemical sensors, and radiation hazards are detected via Geiger–Muller tubes. The system was designed to protect the crew from contamination. When chemical or radioactive contamination is detected at the air inlet for the shelter, air filtration through a carbon filter is activated. At this time, the air test procedure at the filter outlet is started to test the condition of the filter on an ongoing basis. After detecting contamination at the filter outlet, the system turns off the air pumping and the service can start the procedure of replacing the damaged carbon filter. This paper presents the results of laboratory testing of the ALERT gas alarm detector, which showed high measurements for important parameters, including sensitivity, repeatability, accuracy, and speed.

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“…This drawback has been addressed through multiplex ES (MES) techniques, demonstrating the simultaneous operation of hundreds of ES sources and a remarkable packing density exceeding 10 4 sources/cm 2 [33]. Thin films of MOS and conductive polymers have been prepared by ES of precursor solutions or nanoparticle suspensions for gas sensing applications [34][35][36][37][38][39]. Only recently ES has received attention for the preparation of gas sensors based on graphene [40,41].…”

Section: Introductionmentioning

confidence: 99%

Electrospray Printing of Graphene Layers for Chemiresistive Gas Sensors

Hontañón

Masa

Mena

et al. 2020

7th International Electronic Conference on Sensors and Applications

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In this work we investigate the electrospray technique for the preparation of graphene layers for use in chemiresistive gas sensors. A dispersion of reduced graphene oxide (rGO) in isopropanol (0.1 mg/mL) is electrosprayed and the rGO flakes are deposited onto a polymeric substrate with printed interdigitated electrodes. The surface area of the substrate covered with rGO is mainly determined by the distance between the needle and the substrate, while the rGO deposition pattern strongly depends on the flowrate and the applied voltage. Homogeneous layers of rGO are obtained in stable cone-jet regime, and the room temperature detection behavior of the sensors towards NO2, O3 and CO is assessed. The sensors were not capable of detecting CO (up to 5 ppm), but they detected 0.2 ppm NO2 and 0.05 ppm O3. The results are encouraging regarding the use of electrospray for production of low-cost and low-power consumption gas sensors based on graphene for air quality applications.

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Deposition of Polymer Sensor Films on SAW Surface by Electrospraying Technology

Cited by 5 publications

References 30 publications

Surface Acoustic Wave Humidity Sensor: A Review

Surface Acoustic Wave Humidity Sensor: A Review

Air Pollution and Radiation Monitoring in Collective Protection Facilities

Electrospray Printing of Graphene Layers for Chemiresistive Gas Sensors

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