Humidity sensing using microfiber-ZnO nanorods coated glass structure

Jali, Mohd Hafiz; Rahim, Hazli Rafis Abdul; Johari, Ashadi Md; Yusof, Haziezol Helmi Mohd; Ahmad, A.; Thokchom, Siddharth; Dimyati, Kaharudin; Harun, Sulaiman Wadi

doi:10.1016/j.ijleo.2021.166715

Cited by 12 publications

(7 citation statements)

References 37 publications

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“…In summary, ZnO nanomaterials with various morphology characteristics have been synthesized through different methods [ 40 , 41 ]. Moreover, the preparation technologies are relatively mature, after the systematic research, which provides a sound material foundation for the intensive study of ZnO nanosensors [ 42 ].…”

Section: Zno Nanostructures and Synthetic Methodsmentioning

confidence: 99%

Progress in ZnO Nanosensors

Que

Lin

Sun

et al. 2021

Sensors

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Developing various nanosensors with superior performance for accurate and sensitive detection of some physical signals is essential for advances in electronic systems. Zinc oxide (ZnO) is a unique semiconductor material with wide bandgap (3.37 eV) and high exciton binding energy (60 meV) at room temperature. ZnO nanostructures have been investigated extensively for possible use as high-performance sensors, due to their excellent optical, piezoelectric and electrochemical properties, as well as the large surface area. In this review, we primarily introduce the morphology and major synthetic methods of ZnO nanomaterials, with a brief discussion of the advantages and weaknesses of each method. Then, we mainly focus on the recent progress in ZnO nanosensors according to the functional classification, including pressure sensor, gas sensor, photoelectric sensor, biosensor and temperature sensor. We provide a comprehensive analysis of the research status and constraints for the development of ZnO nanosensor in each category. Finally, the challenges and future research directions of nanosensors based on ZnO are prospected and summarized. It is of profound significance to research ZnO nanosensors in depth, which will promote the development of artificial intelligence, medical and health, as well as industrial, production.

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Section: Zno Nanostructures and Synthetic Methodsmentioning

confidence: 99%

Progress in ZnO Nanosensors

Que

Lin

Sun

et al. 2021

Sensors

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“…Sensing Element Range (%RH) Sensitivity This work U-shape POF 35-90 0.0231 V/%RH [6] Silica fiber 50-80 0.5221 dBm/% [44] Straight POF 40-90 4.98 nm/%RH [45] Glass substrate 35-85 0.0527 dBm/% [46] Silica fiber 35-85 0.2774 dBm/% [47] Twisted macro-bend POF 40-80 4.23 nW/% [48] Straight POF 50-75 0.0172 mV/% Both sensors (N-UPOF and Z-UPOF) were tested for voltage stability by exposure to 90% RH where the output voltages were recorded continuously for 60 s on the first day and after 10 days. Figure 7 displays N-UPOF and Z-UPOF voltage stability for the 1st and 10th days.…”

Section: Refsmentioning

confidence: 97%

“…Both sensors (N-UPOF and Z-UPOF) showed superiority in terms of sensing performance with > 99% linearity. The standard deviation is the amount of change from the mean value of repeatable measurement data, while the resolution is the minimum concentration of the suggested sensor that gives an output measurement by dividing the standard deviation with sensitivity [45]. The standard deviation and resolution were found to be 0.0619 V and 3.1958%RH for the Z-UPOF, while N-UPOF obtained 0.1157 V and 7.3233%RH, respectively.…”

Section: Refsmentioning

confidence: 99%

ZnO Nanorods Coated Tapered U-Shape Plastic Optical Fiber for Relative Humidity Detection

et al. 2022

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A relative humidity sensor was fabricated by exploiting an evanescent wave (EW) on a U-bent tapered plastic optical fiber (POF) coated with zinc oxide (ZnO) nanorods. The POF was tapered manually using a polishing method to a diameter of 0.5 mm, a length of 5 cm, and a radius of 5 cm. ZnO nanorods were synthesized using a hydrothermal method and grown on the POF by a seeding process for 12 h. A significant response of the sensor was observed when the sensor was exposed to 35 to 90%RH due to the intense chemisorption process and changeable relative index in the POF. The sensitivity and resolution of the sensor have been improved by factors of 1.23 and 2.18, respectively, compared to the conventional tapered POF sensor without ZnO coating. Besides, the ZnO-coated sensor also exhibited better repeatability properties in terms of output voltage when exposed to 35 to 90%RH for three repeated measurements. The obtained results revealed that the proposed new POF sensor has an excellent sensing performance as an RH sensor in terms of sensitivity, repeatability, and stability properties.

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“…Due to its higher power density, stability, and outstanding performancecompared to current energy-related technologies, it has recently been regarded as a potential energy storage device. [106][107] Supercapacitors (SCs) are used in battery backup schemes and connect battery vehicles automobiles. In the group of transition metal oxides, ZnO is well known for having a great energy density of 650 A h g À 1 .…”

Section: Zno As Supercapacitorsmentioning

confidence: 99%

Recent Advances, Challenges, and Future Perspectives of ZnO Nanostructure Materials Towards Energy Applications

Saeed,

Marwani,

Shahzad

et al. 2023

The Chemical Record

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In this approach, zinc oxide (ZnO) is a multipurpose substance with remarkable characteristics such as high sensitivity, a large specific area, non‐toxicity, excellent compatibility, and a high isoelectric point, which make it attractive for discussion with some limitations. It is the most favorable possible option for the collection of nanostructures in terms of structure and their characteristics. The development of numerous ZnO nanostructure‐based electrochemical sensors and biosensors used in health diagnosis, pharmaceutical evaluation, food hygiene, and contamination of the environment monitoring is described, as well as the production of ZnO nanostructures. Nanostructured ZnO has good chemical and temperature durability as an n‐type semiconducting material, making it useful in a wide range of uses, from luminous materials to supercapacitors, batteries, solar cells, photocatalysis, biosensors, medicinal devices, and more. When compared to the bulk materials, the nanosized materials have both a higher rate of disintegration and a higher solubility. Furthermore, ZnO nanoparticles are regarded as top contenders for electrochemical sensors due to their strong electrochemical behaviors and electron transmission characteristics. The impact of many factors, including selectivity, sensitivity, detection limit, strength, and structures, arrangements, and their respective functioning processes, has been investigated. This study concentrated a substantial amount of its attention on the recent advancements that have been made in ZnO‐based nanoparticles, composites, and modified materials for use in the application areas of energy storage and conversion devices as well as biological applications. Supercapacitors, Li‐ion batteries, dye‐sensitized solar cells, photocatalysis, biosensors, medicinal, and biological systems have been studied. ZnO‐based materials are constantly analyzed for their advantages in energy and life science applications.

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Humidity sensing using microfiber-ZnO nanorods coated glass structure

Cited by 12 publications

References 37 publications

Progress in ZnO Nanosensors

Progress in ZnO Nanosensors

ZnO Nanorods Coated Tapered U-Shape Plastic Optical Fiber for Relative Humidity Detection

Recent Advances, Challenges, and Future Perspectives of ZnO Nanostructure Materials Towards Energy Applications

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