Influence of calcination temperature on the growth of electrospun multi-junction ZnO nanowires: A room temperature ammonia sensor

Selvaraj, Bhuvaneswari; Rayappan, John Bosco Balaguru; Babu, K. Jayanth

doi:10.1016/j.mssp.2020.105006

Cited by 27 publications

(11 citation statements)

References 39 publications

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“…This way, the response is much higher and the limit of detection (LoD) is in parts per billion (ppb). Silicon and metal oxide nanowires have been studied as ammonia sensors [ 19 , 20 , 21 , 22 , 23 , 24 ]. Nanowires are commonly used as a porous thin film on which metal electrodes are deposited [ 25 , 26 ] but they can also be grown directly from the electrodes [ 27 , 28 ] or even contacted individually [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Assessment of Trout Fish Spoilage with a Single Nanowire Gas Sensor in a Thermal Gradient

et al. 2021

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The response of a single tin oxide nanowire was collected at different temperatures to create a virtual array of sensors working as a nano-electronic nose. The single nanowire, acting as a chemiresistor, was first tested with pure ammonia and then used to determine the freshness status of trout fish (Oncorhynchus mykiss) in a rapid and non-invasive way. The gas sensor reacts to total volatile basic nitrogen, detecting the freshness status of the fish samples in less than 30 s. The sensor response at different temperatures correlates well with the total viable count (TVC), demonstrating that it is a good (albeit indirect) way of measuring the bacterial population in the sample. The nano-electronic nose is not only able to classify the samples according to their degree of freshness but also to quantitatively estimate the concentration of microorganisms present. The system was tested with samples stored at different temperatures and classified them perfectly (100%), estimating their log(TVC) with an error lower than 5%.

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Section: Introductionmentioning

confidence: 99%

Quantitative Assessment of Trout Fish Spoilage with a Single Nanowire Gas Sensor in a Thermal Gradient

et al. 2021

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“…In the literature, there are studies that present different methods through which gas detection with these materials was obtained at low temperatures, or even at RT [ 11 , 83 , 100 , 124 ], also for SAW sensors. For example, Wang et al [ 81 ] developed a SAW sensor based on copper-ion-doped polyaniline/tungsten oxide nanocomposite for NO detection at RT [ 90 ].…”

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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“…ZnO is one of the first ceramic oxide NFs that is fabricated using the electrospinning process. Among many electrospun metal oxide NFs, ZnO NFs are widely used for sensing various gases such as ammonia, [12] nitrogen dioxide, [13,14] methane, [15] acetone, [16] hydrogen, [17] hydrogen sulfide, [18] carbon dioxide, [19] ethanol, [20] and carbon monoxide. [21,22] The ZnO is advantageous over the other metal oxides for gas sensing due to its n-type semiconducting nature with a bandgap of 3.37 eV.…”

Section: Introductionmentioning

confidence: 99%

Electrospun ZnO Nanofiber Based Resistive Gas/Vapor Sensors -A Review

Prabhu¹,

Chandra²,

Rajendra³

et al. 2022

Eng. Sci.

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Resistive zinc oxide (ZnO) sensors play a pivotal role in detecting various gases and vapors due to their high response, low cost, stability, tunability, and simple fabrication. Hence, it is necessary to know the recent status of research in resistive ZnO sensors. The sensitivity is determined by the reactions at the surface of the nanofiber (NF); therefore, the surface area defines the foremost sensor characteristics. Electrospun metal oxide NFs exhibit a high surface area and unique electrical properties that can be tuned, and they are highly sought as the materials for resistive gas sensors. So far, various strategies are adopted to improve the sensitivity and the selectivity of ZnO NFs. This review summarizes the recent methods utilized by various researchers to improve the sensitivity of the ZnO electrospun metal oxide NF-based resistive gas sensors. Also, it discusses the influence of process parameters on the structure and morphology of ZnO NFs, the mechanism of gas sensing and highlights its improvement through advanced methods. The sensitivity of the NF has been improved through tuning the structure and morphology of NFs and doping. Further, modification of NF sensitivity through functionalization, the addition of carbon nanomaterials, and high-energy irradiation are also discussed. Based on the recent literature, the performance of doped ZnO NF for various gas sensing is highlighted. The outcome of this review gives insight to academic researchers and industry for further investigation and development in resistive gas sensors and its applications.

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Influence of calcination temperature on the growth of electrospun multi-junction ZnO nanowires: A room temperature ammonia sensor

Cited by 27 publications

References 39 publications

Quantitative Assessment of Trout Fish Spoilage with a Single Nanowire Gas Sensor in a Thermal Gradient

Quantitative Assessment of Trout Fish Spoilage with a Single Nanowire Gas Sensor in a Thermal Gradient

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

Electrospun ZnO Nanofiber Based Resistive Gas/Vapor Sensors -A Review

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