Electrospun PVA/TiC Nanofibers for High Performance Capacitive Humidity Sensing

Mazhar, Sadaf; Qarni, Awais Ali; Haq, Yasir Ul; Haq, Z.; Murtaza, Imran; Ahmad, Naeem; Jabeen, Nida; Amin, Shahid

doi:10.1016/j.microc.2020.104974

Cited by 15 publications

(12 citation statements)

References 74 publications

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“…It also has potential applications in our daily life such as the real-time monitoring of respiration for athletes and patients, detection of certain diseases, weather forecasting, and air-conditioning monitoring of buildings. − The importance of humidity sensors has instigated much interest in designing devices based on variation of physical, chemical, and microstructural properties upon humidity change. Various types of humidity sensors, such as electronic humidity sensors, , optical fiber humidity sensors, − and colorimetric humidity sensors, − are classified based on their operating principles using capacitive, resistive, gravimetric, and optical properties . Despite various advantages of electronic and optical fiber humidity sensors, the complex fabrication process and the relatively high cost of electronic and optical components and equipment limit their scope of commercial applications .…”

Section: Introductionmentioning

confidence: 99%

“…Various types of humidity sensors, such as electronic humidity sensors, 8,9 optical fiber humidity sensors, 10−12 and colorimetric humidity sensors, 13−18 are classified based on their operating principles using capacitive, resistive, gravimetric, and optical properties. 19 Despite various advantages of electronic and optical fiber humidity sensors, the complex fabrication process and the relatively high cost of electronic and optical components and equipment limit their scope of commercial applications. 10 Compared with other types of humidity sensors, colorimetric humidity sensors exhibit a visible color change in response to a humidity change without using special equipment and external power sources, which is convenient to use through visual observation by the naked eye directly.…”

Section: Introductionmentioning

confidence: 99%

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Azobenzene/Acid Binary Systems for Colorimetric Humidity Sensing with Reversibility, High Sensitivity, and Tunable Colors

Zhou

Zhao

2022

ACS Appl. Mater. Interfaces

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Humidity sensors are important for humidity detection in many storage and manufacturing processes. Issues like sensibility, response rate, controllability, and material and preparation process costs need to be taken into consideration for practical applications. Herein, we report an investigation on a series of azobenzene/acid binary systems using easily accessible compounds, whose thin films display reversible and widely tunable color changes in response to humidity stimulation, with high sensitivity, fast color change, and recovery speed. The interesting properties for colorimetric humidity sensing are showcased with potential applications in dynamic art painting, smart windows, and respiration monitoring.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Azobenzene/Acid Binary Systems for Colorimetric Humidity Sensing with Reversibility, High Sensitivity, and Tunable Colors

Zhou

Zhao

2022

ACS Appl. Mater. Interfaces

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“…Electrospun nanofibers can be produced in electrospinning devices and have had a wide range of applications in scientific and medical research. These fibers have been used in sensors [12], actuators [13], cellular growth and tissue engineering [14] ,air filtering [15], etc. Another essential device in material sciences, a dip coating device, with the purpose of producing polymeric films, with applications in anticorrosion barriers [16], electrochromic devices [17], microneedles [18], etc.…”

Section: Introductionmentioning

confidence: 99%

Device Fabrication from Recycled Electronic Spare Parts: Dip Coating Device and High Voltage Power Supply Adapted for Electrospinning Device

Agarwal

Enríquez

Rivera

2022

J. Phys.: Conf. Ser.

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Considering the rapidly increasing amounts of electronic waste, the task of its recycling and disposal is essential and increasingly important all over the world. Recycled components were used to create lab equipment, namely a high voltage power source, an electrospinning device, and a dip coating device. The high voltage power source was created with the purpose of powering the electrospinning device using electronic waste from microwaves, air conditioners, and cars although it can also be modified to power devices such as X-ray machines or ozone generators. On the other hand, the dip coating device was assembled using spare parts from a discarded printer. The validation of their functioning was demonstrated through the presence of sufficiently high voltages and the synthesis of polymeric nanofibers, which were found to be comparable to those produced in a BIOINICIA FLUIDNATEK LE 10. The production of homogeneous films estimated to be of nanometric proportions validated the functioning of the dip coating device. Such equipment can benefit research in locations with a lack of funds, as it is far more economic than the devices from well-established companies.

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“…Therefore, the investigation of a unique sensing material and methods to fabricate high-performance sensors is highly desirable [ 25 ]. Compared to conventional methods, the electrospinning technique is a promising and economical method for one-dimensional nanofibers based on metal oxide nanostructures or polymer-based composites [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Humidity Sensors Based on Polyethylene Oxide/CuO/Multi Walled Carbon Nanotubes Composite Nanofibers

et al. 2021

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Polymer composites are favorite materials for sensing applications due to their low cost and easy fabrication. In the current study, composite nanofibers consisting of polyethylene oxide (PEO), oxidized multi-walled carbon nanotubes (MWCNT) and copper oxide (CuO) nanoparticles with 1% and 3% of fillers (i.e., PEO–CuO–MWCNT: 1%, and PEO–CuO–MWCNT: 3%) were successfully developed through electrospinning for humidity sensing applications. The composite nanofibers were characterized by FTIR, XRD, SEM and EDX analysis. Firstly, they were loaded on an interdigitated electrode (IDE), and then the humidity sensing efficiency was investigated through a digital LCR meter (E4980) at different frequencies (100 Hz–1MHz), as well as the percentage of relative humidity (RH). The results indicated that the composite nanofibers containing 1% and 3% MWCNT, combined with CuO in PEO polymer matrix, showed potent resistive and capacitive response along with high sensitivity to humidity at room temperature in an RH range of 30–90%. More specifically, the PEO–CuO–MWCNT: 1% nanocomposite displayed a resistive rapid response time within 3 s and a long recovery time of 22 s, while the PEO–CuO–MWCNT: 3% one exhibited 20 s and 11 s between the same RH range, respectively.

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Electrospun PVA/TiC Nanofibers for High Performance Capacitive Humidity Sensing

Cited by 15 publications

References 74 publications

Azobenzene/Acid Binary Systems for Colorimetric Humidity Sensing with Reversibility, High Sensitivity, and Tunable Colors

Azobenzene/Acid Binary Systems for Colorimetric Humidity Sensing with Reversibility, High Sensitivity, and Tunable Colors

Device Fabrication from Recycled Electronic Spare Parts: Dip Coating Device and High Voltage Power Supply Adapted for Electrospinning Device

Highly Sensitive Humidity Sensors Based on Polyethylene Oxide/CuO/Multi Walled Carbon Nanotubes Composite Nanofibers

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