Ultraviolet and Infrared Irradiations Sensing of Gel-Orange Dye Composite-Based Flexible Electrochemical Cells

Chani, Muhammad Tariq Saeed; Karimov, Khasan S.; Asiri, Abdullah M.; Kamal, Tahseen; Bakhsh, Esraa M.; Rahman, Mohammed M.

doi:10.3390/gels8020083

Cited by 1 publication

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“…The flexible electrochemical sensors based on Al/Gr-Jelly/Cu-rubber composites were fabricated, and the effect of temperature and humidity on their voltage and impedances was studied [ 15 ]. The gel-orange dye-based flexible electrochemical cells were studied for infrared and ultraviolet irradiations sensing [ 16 ]. The orange dye-CNTs’ composite-based flexible transversal and longitudinal displacement sensors were also studied [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Orange Dye and Silicone Glue Composite Gel-Based Optimized Impedimetric and Capacitive Surface-Type Proximity Sensors

Karimov,

Chani,

Fatima

et al. 2023

Gels

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Optimized surface-type impedimetric and capacitive proximity sensors have been fabricated on paper substrates by using rubbing-in technology. The orange dye (OD) and silicone glue (SG) composite-gel films were deposited on the zig-zag gap between two aluminum electrodes fixed on a paper (dielectric) substrate. The effect of proximity of various objects (receivers) on the impedance and the capacitance of the sensors was investigated. These objects were semi-cylindrical aluminum (metallic) foil, a cylindrical plastic tube filled with water, a kopeck-shaped plastic tube filled with carbon nanotubes and a human finger. The mechanism of sensing was based on the change in impedance and/or the capacitance of the sensors with variation of proximity between the surfaces of the sensor and the object. On decreasing proximity, the impedance of the sensors increased while the capacitance decreased. The impedimetric proximity sensitivities of CNT, water, metal-based receivers and the finger were up to 60 × 103 Ω/mm, 35 × 103 Ω/mm, 44 × 103 Ω/mm and 6.2 × 103 Ω/mm, respectively, while their capacitive sensitivities were −19.0 × 10−2 pF/mm, −16.0 × 10−2 pF/mm, −16.4 × 10−2 pF/mm and −1.8 × 10−2 pF/mm. If needed for practical application, the sensors can be built in to the Wheatstone bridge, which can also increase the sensitivity of the measurement. Moreover, the sensor’s materials are low cost, while the fabrication technique is easy and ecologically friendly. The sensor can also be used for demonstrative purposes in school and college laboratories.

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Section: Introductionmentioning

confidence: 99%