Portable Nanohybrid Paper-Based Chemiresistive Sensor for Free Chlorine Detection

Yen, Yi-Kuang; Lee, Kuan-Yi; Lin, Chun-Yi; Zhang, Shuting; Wang, Chengwei; Liu, Ta-Yu

doi:10.1021/acsomega.0c03366

Cited by 16 publications

(26 citation statements)

References 19 publications

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“…The limit of detection (LOD) was calculated for the chemiresistor using Equation (4) of the calibration curve ( R 2 = 0.98), as shown in Figure 6 . The LOD of the sensor was defined as three times the standard deviation of a blank signal response [ 34 ]. The LOD of the chemiresistor for butanol gas was calculated to be 44.92 ppm.…”

Section: Resultsmentioning

confidence: 99%

Tungsten Disulfide Nanotube-Modified Conductive Paper-Based Chemiresistive Sensor for the Application in Volatile Organic Compounds’ Detection

Huang

Immanuel

Yen

et al. 2021

Sensors

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Toxic and nontoxic volatile organic compound (VOC) gases are emitted into the atmosphere from certain solids and liquids as a consequence of wastage and some common daily activities. Inhalation of toxic VOCs has an adverse effect on human health, so it is necessary to monitor their concentration in the atmosphere. In this work, we report on the fabrication of inorganic nanotube (INT)-tungsten disulfide, paper-based graphene–PEDOT:PSS sheet and WS2 nanotube-modified conductive paper-based chemiresistors for VOC gas sensing. The WS2 nanotubes were fabricated by a two-step reaction, that is oxide reduction and sulfurization, carried out at 900 °C. The synthesized nanotubes were characterized by FE-SEM, EDS, XRD, Raman spectroscopy, and TEM. The synthesized nanotubes were 206–267 nm in diameter. The FE-SEM results show the length of the nanotubes to be 4.5–8 µm. The graphene–PEDOT:PSS hybrid conductive paper sheet was fabricated by a continuous coating process. Then, WS2 nanotubes were drop-cast onto conductive paper for fabrication of the chemiresistors. The feasibility and sensitivity of the WS2 nanotube-modified paper-based chemiresistor were tested in four VOC gases at different concentrations at room temperature (RT). Experimental results show the proposed sensor to be more sensitive to butanol gas when the concentration ranges from 50 to 1000 ppm. The limit of detection (LOD) of this chemiresistor for butanol gas was 44.92 ppm. The WS2 nanotube-modified paper-based chemiresistor exhibits good potential as a VOC sensor with the advantages of flexibility, easy fabrication, and low fabrication cost.

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Section: Resultsmentioning

confidence: 99%

Tungsten Disulfide Nanotube-Modified Conductive Paper-Based Chemiresistive Sensor for the Application in Volatile Organic Compounds’ Detection

Huang

Immanuel

Yen

et al. 2021

Sensors

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“…An example of paper-based chemiresistive sensor for real-time monitoring of free chlorine is shown in Fig. 4b [112]. This sensor uses nanohybrid ink based on graphene and PEDOT: PSS.…”

Section: ) Interdigitated and Chemi-resistive Based Sensormentioning

confidence: 99%

Connected Sensors, Innovative Sensor Deployment, and Intelligent Data Analysis for Online Water Quality Monitoring

Manjakkal

Mitra

Pétillot

et al. 2021

IEEE Internet Things J.

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The sensor technology for water quality monitoring (WQM) has improved during recent years. The cost-effective sensorised tools that can autonomously measure the essential physical -chemical and biological (PCB) variables are now readily available and are being deployed on buoys, boats and ships. Yet, there is a disconnect between the data quality, data gathering and data analysis due to the lack of standardized approaches for data collection and processing, spatio-temporal variation of key parameters in water bodies and new contaminants. Such gaps can be bridged with a network of multiparametric sensor systems deployed in water bodies using autonomous vehicles such as marine robots and aerial vehicles to broaden the data coverage in space and time. Further, intelligent algorithms (e. g. artificial intelligence (AI)) could be employed for standardised data analysis and forecasting. This paper presents a comprehensive review of the sensors, deployment and analysis technologies for WQM. A network of networked water bodies could enhance the global data intercomparability and enable WQM at global scale to address global challenges related to food (e.g., aqua/agriculture), drinking water, and health (e.g., water borne diseases).

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“…There is indeed a concern that most environmental inspection assays could not meet outdoor onsite detection due to the requirements of complicated instruments and a relative long detection time [ 73 ]. With properties of low cost, easy operation, great portability, and easy disposal, paper-based sensors were found reliable to detect carbon dioxide [ 33 ], airborne particulate [ 74 ], volatile organic compounds [ 75 ] in the air, heavy metals [ 76 ], phosphates [ 77 ], inorganic element ions [ 78 , 79 , 80 ], nitrite [ 81 ], and nicotine [ 82 ] in the water.…”

Section: Paper-based Sensors For Environmental Quality Inspectionmentioning

confidence: 99%

Hospitals and Laboratories on Paper-Based Sensors: A Mini Review

Zhang

Xia

Feng

et al. 2021

Sensors

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With characters of low cost, portability, easy disposal, and high accuracy, as well as bulky reduced laboratory equipment, paper-based sensors are getting increasing attention for reliable indoor/outdoor onsite detection with nonexpert operation. They have become powerful analysis tools in trace detection with ultra-low detection limits and extremely high accuracy, resulting in their great popularity in medical detection, environmental inspection, and other applications. Herein, we summarize and generalize the recently reported paper-based sensors based on their application for mechanics, biomolecules, food safety, and environmental inspection. Based on the biological, physical, and chemical analytes-sensitive electrical or optical signals, extensive detections of a large number of factors such as humidity, pressure, nucleic acid, protein, sugar, biomarkers, metal ions, and organic/inorganic chemical substances have been reported via paper-based sensors. Challenges faced by the current paper-based sensors from the fundamental problems and practical applications are subsequently analyzed; thus, the future directions of paper-based sensors are specified for their rapid handheld testing.

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Portable Nanohybrid Paper-Based Chemiresistive Sensor for Free Chlorine Detection

Cited by 16 publications

References 19 publications

Tungsten Disulfide Nanotube-Modified Conductive Paper-Based Chemiresistive Sensor for the Application in Volatile Organic Compounds’ Detection

Tungsten Disulfide Nanotube-Modified Conductive Paper-Based Chemiresistive Sensor for the Application in Volatile Organic Compounds’ Detection

Connected Sensors, Innovative Sensor Deployment, and Intelligent Data Analysis for Online Water Quality Monitoring

Hospitals and Laboratories on Paper-Based Sensors: A Mini Review

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