On the Ammonia Gas Sensing Performance of a RF Sputtered NiO Thin-Film Sensor

Chou, Po-Cheng; Chen, Huey-Ing; Liu, I-Ping; Chen, Chun-Chia; Liou, Jian-Kai; Hsu, Kai-Siang; Liu, Wen‐Chau

doi:10.1109/jsen.2015.2391286

Cited by 78 publications

(26 citation statements)

References 25 publications

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“…Based on this model, it is possible to describe second order kinetics assuming that the actual solid surfaces are energetically heterogeneous. In reactions involving the adsorption of gases on a solid surface, equation (4) is commonly used in the kinetics of the chemisorption of gases on solids . The general form of Elovich model can be expressed as,

true q = ([], \frac{1}{α} prefixln (α^{'} α)) + ([], \frac{1}{α} prefixln (t))

…”

Section: Resultsmentioning

confidence: 99%

Rapid, Trace‐Level Ammonia Gas Sensor Based on Surface‐Engineered Ag Nanoclusters@Polyaniline/Multiwalled Carbon Nanotubes and Insights into Their Mechanistic Pathways

2017

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An ultrasensitive and selective chemiresistive sensor interface based on Ag nanocluster integrated polyaniline functionalized multi-walled carbon nanotubes (AgNC@PANI/MWCNTs) has been developed for trace-level detection of NH 3 gas at room temperature. AgNC@PANI/MWCNTs was synthesized using surfactant-free, one-pot wet-chemical process, by controlled integration of active Ag sites onto MWCNTs. The structure and morphology of AgNC@PANI/MWCNTs nanocomposite have been extensively studied by various characterization techniques. The gas sensing properties of AgNC@PANI/MWCNTs nanocomposite towards trace-level concentrations NH 3 (2-10 ppm), an important biomarker in exhaled human breath, was systematically evaluated. The sensor exhibited dramatic enhancement in the sensor response (26 %), fast response (5 s) and recovery (~4 s) characteristics with good reproducibility and selectivity upon exposure to NH 3 gas. The excellent performance of the sensor towards NH 3 could be attributed to the rapid electronic sensitization of surface engineered active AgNC sites in the composite in which oxidized AgNC were found to play a critical role. Effect of humidity and the kinetics of the NH 3 gas adsorption on nanocomposite were analyzed. The possible interactions between NH 3 and AgNC@PANI/ MWCNTs nanocomposite were discussed. This investigation can pave the way to novel strategies for designing and fabricating low-cost, high performance NH 3 gas sensors for clinical breath analyzer application.[a] S.

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true q = ([], \frac{1}{α} prefixln (α^{'} α)) + ([], \frac{1}{α} prefixln (t))

…”

Section: Resultsmentioning

confidence: 99%

Rapid, Trace‐Level Ammonia Gas Sensor Based on Surface‐Engineered Ag Nanoclusters@Polyaniline/Multiwalled Carbon Nanotubes and Insights into Their Mechanistic Pathways

2017

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“…Optical fiber sensors are deployed for detection of different hazardous gases including ammonia (NH 3 ). Ammonia is widely used gas in different applications such as chemical industries, agricultures and medicines [18,19] . Natural NH 3 level present in the atmosphere is in low ppb (1-5 ppb) levels.…”

Section: Etched-tapered Optical Fiber Sensorsmentioning

confidence: 99%

“…Additionally, NH 3 sensors remain the potential candidates employed in agriculture, chemical industries, pharmaceutical, hydrogen fuels, defense and food processing industries to monitor the NH 3 leak in controlled atmospheres. Hence, the development of highly-sensitive and reliable NH 3 sensors to continuously detect leakages NH 3 is a key issue for the safety of environments [19].…”

Section: Etched-tapered Optical Fiber Sensorsmentioning

confidence: 99%

Modified Single Mode Optical Fiber Ammonia Sensors Deploying PANI Thin Films

Mohammed¹,

Yaacob²

2021

Application of Optical Fiber in Engineering

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Modified optical fiber sensors received increasing attention because of their superior properties over electrical sensors. These properties include their immunity towards electromagnetic interference and the ability to be deployed in corrosive and volatile environment. Several optical fiber platforms have been developed for chemical sensing applications based on modifying optical fiber cladding layer such as etched, tapered, D-shaped and etched-tapered. The modifications purpose is to extend the evanescent wave propagating out of the core physical dimensions. Thus, evanescent wave interaction with analyte is enhanced. Modified optical transducing platforms are integrated in gas sensing applications, such as ammonia. Modified optical fiber sensors coated with nanostructured thin films have been developed and gained popularity as practical devices towards gases with low concentrations. The development and characterization of the modified SMF sensing platforms including etched, tapered and etched-tapered platforms against ammonia will be presented in this chapter. These platforms were coated with PANI nanostructured thin film. The 50 μm etched-tapered SMF coated with PANI produced response, recovery times, and sensitivity of 58 s, 475 s, and 231.5%, respectively, in the C-band range. The limit of detection of the modified fiber sensor was 25 ppm. The developed sensors exhibit good repeatability, reversibility, and selectivity.

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“…For all types of sensors, including SAW sensors, it is important to operate at RT, and at the same time, to ensure that a signal is obtained at the lowest analyte concentrations. The reference metal oxide semiconductors used in the domain of sensors include In 2 O 3 [ 34 , 107 , 108 , 109 , 110 ], ZnO [ 45 , 111 , 112 , 113 ], Co 3 O 4 [ 114 , 115 , 116 ], SnO 2 [ 99 , 117 ], CuO/Cu 2 O [ 100 , 118 ], TiO 2 [ 24 , 119 ], NiO [ 58 , 120 ], Fe 2 O 3 [ 121 , 122 ], and WO 3 [ 23 , 123 ]. They were most often used to detect volatile organic compounds, hydrogen, ammonia, etc.…”

Section: Sensitive Materials Used In Gas Detectionmentioning

confidence: 99%

ZnO Metal Oxide Semiconductor in Surface Acoustic Wave Sensors: A Review

Constantinoiu

Viespe

2020

Sensors

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Surface acoustic wave (SAW) gas sensors are of continuous development interest to researchers due to their sensitivity, short detection time, and reliability. Among the most used materials to achieve the sensitive film of SAW sensors are metal oxide semiconductors, which are highlighted by thermal and chemical stability, by the presence on their surface of free electrons and also by the possibility of being used in different morphologies. For different types of gases, certain metal oxide semiconductors are used, and ZnO is an important representative for this category of materials in the field of sensors. Having a great potential for the development of SAW sensors, the discussion related to the development of the sensitivity of metal oxide semiconductors, especially ZnO, by the synthesis method or by obtaining new materials, is suitable and necessary to have an overview of the latest results in this domain.

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On the Ammonia Gas Sensing Performance of a RF Sputtered NiO Thin-Film Sensor

Cited by 78 publications

References 25 publications

Rapid, Trace‐Level Ammonia Gas Sensor Based on Surface‐Engineered Ag Nanoclusters@Polyaniline/Multiwalled Carbon Nanotubes and Insights into Their Mechanistic Pathways

Rapid, Trace‐Level Ammonia Gas Sensor Based on Surface‐Engineered Ag Nanoclusters@Polyaniline/Multiwalled Carbon Nanotubes and Insights into Their Mechanistic Pathways

Modified Single Mode Optical Fiber Ammonia Sensors Deploying PANI Thin Films

ZnO Metal Oxide Semiconductor in Surface Acoustic Wave Sensors: A Review

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