Highly Sensitive Surface Plasmon Resonance Humidity Sensor Based on a Polyvinyl-Alcohol-Coated Polymer Optical Fiber

Wang, Ying; Wang, Jingru; Shao, Ying; Liao, Changrui; Wang, Yiping

doi:10.3390/bios11110461

Cited by 19 publications

(8 citation statements)

References 40 publications

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“…For 10 times dipping as shown in Figure 3(f), the maximum intensity of 4100 counts was observed at 60 % RH, while the lowest intensity of 1451 counts was found at 90 % RH. The response of the proposed sensor is faster than that of previously reported devices [21]. Figure 4 shows the relationship between intensity and varying % RH for different numbers of dipping where the data are summarized in Table 1.…”

Section: Relative Humidity Measurementmentioning

confidence: 87%

Effect of dipping number of polyvinyl alcohol (PVA) -coated on optical Fiber for Humidity Sensor

Hairi

Rosli²,

Mamat³

et al. 2023

J. Phys.: Conf. Ser.

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Optical Fiber Humidity Sensors (OFHSs) have attracted significant research interest due to their several advantages including small size, high durability and can withstand the extreme environment regardless of high temperature, high pressure and high electromagnetic radiation. In this study, the proposed sensors were built from standard single-mode silica fibers working at telecommunication wavelengths and exhibited very good humidity sensing characteristics. Single-mode optical fibers were coated with different dipping numbers (2, 4, 6 8, and 10 times) of polyvinyl alcohol (PVA) solution using a dip coating method. The sensing performance of uncoated and PVA-coated optical fiber sensors in terms of its sensitivity for various relative humidity (RH) percentages ranging from 40 to 90 % RH was monitored using Ocean Optics spectrometer. The intensity peaks of PVA-coated optical fibers were increased linearly with dipping numbers. The optimum sensing performance was observed for 10 times dipping number of PVA solution with the highest intensity of 4100 counts at 60 % RH and exhibits good repeatability with precision error values in the range of 0 to 2 %. Furthermore, the gap difference between intensity counts due to % RH changes could be clearly observed for 10 times dipping numbers. These reported results are important to enhance the performance of humidity sensor for sensing and monitoring purposes.

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Section: Relative Humidity Measurementmentioning

confidence: 87%

Effect of dipping number of polyvinyl alcohol (PVA) -coated on optical Fiber for Humidity Sensor

Hairi

Rosli²,

Mamat³

et al. 2023

J. Phys.: Conf. Ser.

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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: 96%

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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“…However, the control of the resultant polymeric structure becomes more difficult since these crosslinking reactions usually occur within the solid-state [32,33]. Thus far, hydrophilic polymers such as polyethyleneimine (PEI), polyethylene oxide (PEO), polyvinyl alcohol (PVA), and polyaniline (PANI) were utilized as composite sensors to obtain an improved sensitivity and response time [34][35][36]. As a result, an increase in the sensor's surface wettability enhanced the adherence of water molecules on its surface and consequently increased the surface conductivity.…”

Section: Organic Materialsmentioning

confidence: 99%

Recent Sensing Technologies of Imperceptible Water in Atmosphere

Mekawy

Kawakita

2022

Chemosensors

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Accurate detection and quantitative evaluation of environmental water in vapor and liquids state expressed as humidity and precipitation play key roles in industrial and scientific applications. However, the development of supporting tools and techniques remains a challenge. Although optical methods such as IR and LASER could detect environmental water in the air, their apparatus is relatively huge. Alternatively, solid detection field systems (SDFSs) could recently lead to a revolution in device downsizing and sensing abilities via advanced research, mainly for materials technology. Herein, we present an overview of several SDFS based sensing categories and their core materials mainly used to detect water in atmosphere, either in the vapor or liquid phase. We considered the governing mechanism in the detection process, such as adsorption/desorption, condensation/evaporation for the vapor phase, and surface attach/detach for the liquid phase. Sensing categories such as optical, chilled mirror, resistive, capacitive, gravimetric sensors were reviewed together with their designated tools such as acoustic wave, quartz crystal microbalance, IDT, and many others, giving typical examples of daily based real scientific applications.

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Highly Sensitive Surface Plasmon Resonance Humidity Sensor Based on a Polyvinyl-Alcohol-Coated Polymer Optical Fiber

Cited by 19 publications

References 40 publications

Effect of dipping number of polyvinyl alcohol (PVA) -coated on optical Fiber for Humidity Sensor

Effect of dipping number of polyvinyl alcohol (PVA) -coated on optical Fiber for Humidity Sensor

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

Recent Sensing Technologies of Imperceptible Water in Atmosphere

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