Fabrication of nanocubic ZnO/SnO2 film-based humidity sensor with high sensitivity by ultrasonic-assisted solution growth method at different Zn:Sn precursor ratios

Sin, N. D. Md; Mamat, M. H.; Malek, M. F.; Rusop, M.

doi:10.1007/s13204-013-0262-5

Cited by 42 publications

(10 citation statements)

References 44 publications

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“…Similarly, Qin Kuang et al [39] have prepared a high-sensitivity humidity sensor based on a single SnO 2 nanowire: the calculated response and recovery times, based on different RHs (5%, 30%, 48%, 76%, and 85%), were in the ranges 120–170 s and 20–60 s, respectively. Sin et al [40] have prepared a humidity sensor based on a film of nanocubic ZnO:SnO 2 with high sensitivity, by ultrasonic-assisted solution growth method with different Zn:Sn precursor ratios. The calculated response and recovery times were of 411 s and 98 s, respectively.…”

Section: Resultsmentioning

confidence: 99%

Standardization, Calibration, and Evaluation of Tantalum-Nano rGO-SnO2 Composite as a Possible Candidate Material in Humidity Sensors

Karthick

Lee

Kwon

et al. 2016

Sensors

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The present study focuses the development and the evaluation of humidity sensors based on reduced graphene oxide—tin oxide (rGO-SnO2) nanocomposites, synthesized by a simple redox reaction between GO and SnCl2. The physico-chemical characteristics of the nanocomposites were analyzed by XRD, TEM, FTIR, and Raman spectroscopy. The formation of SnO2 crystal phase was observed through XRD. The SnO2 crystal phase anchoring to the graphene sheet was confirmed through TEM images. For the preparation of the sensors, tantalum substrates were coated with the sensing material. The sensitivity of the fabricated sensor was studied by varying the relative humidity (RH) from 11% to 95% over a period of 30 days. The dependence of the impedance and of the capacitance with RH of the sensor was measured with varying frequency ranging from 1 kHz to 100 Hz. The long-term stability of the sensor was measured at 95% RH over a period of 30 days. The results proved that rGO-SnO2 nanocomposites are an ideal conducting material for humidity sensors due to their high sensitivity, rapid response and recovery times, as well as their good long-term stability.

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Section: Resultsmentioning

confidence: 99%

Standardization, Calibration, and Evaluation of Tantalum-Nano rGO-SnO2 Composite as a Possible Candidate Material in Humidity Sensors

Karthick

Lee

Kwon

et al. 2016

Sensors

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“…Porous ceramic or nanorod-based ceramic humidity sensors can be realized and formed through techniques such as thick film screen printing [ 177 , 178 ] whereby conductive and nonconductive pastes are deposited onto an insulating substrate, thin films of plasma or vacuum vapour which are deposited based on semiconducting metal oxides [ 179 , 180 ], and films are formed by anodization, mostly for aluminium oxide (Al 2 O 3 ) [ 181 ]. In such thick film products the film thickness is usually greater than 10 μm and dopant agents can be added to pre-reacted powders as reaction catalysts to promote the dissociation of water molecules into functional groups containing hydrogen and hydroxyl ions.…”

Section: Impedance Type Humidity Sensors (Resistive)mentioning

confidence: 99%

Humidity Sensors Principle, Mechanism, and Fabrication Technologies: A Comprehensive Review

Farahani

Wagiran

Hamidon

2014

Sensors

1,012

562

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Humidity measurement is one of the most significant issues in various areas of applications such as instrumentation, automated systems, agriculture, climatology and GIS. Numerous sorts of humidity sensors fabricated and developed for industrial and laboratory applications are reviewed and presented in this article. The survey frequently concentrates on the RH sensors based upon their organic and inorganic functional materials, e.g., porous ceramics (semiconductors), polymers, ceramic/polymer and electrolytes, as well as conduction mechanism and fabrication technologies. A significant aim of this review is to provide a distinct categorization pursuant to state of the art humidity sensor types, principles of work, sensing substances, transduction mechanisms, and production technologies. Furthermore, performance characteristics of the different humidity sensors such as electrical and statistical data will be detailed and gives an added value to the report. By comparison of overall prospects of the sensors it was revealed that there are still drawbacks as to efficiency of sensing elements and conduction values. The flexibility offered by thick film and thin film processes either in the preparation of materials or in the choice of shape and size of the sensor structure provides advantages over other technologies. These ceramic sensors show faster response than other types.

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“…The performance of the fabricated humidity sensors were analyzed based on their sensitivity where sensitivity is given by [68]:…”

Section: Humidity Sensing Performancementioning

confidence: 99%

Modulation of Sn concentration in ZnO nanorod array: intensification on the conductivity and humidity sensing properties

Ismail

Mamat

Banu

et al. 2018

J Mater Sci: Mater Electron

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Tin (Sn)-doped zinc oxide (ZnO) nanorod arrays (TZO) were synthesized onto aluminum-doped ZnO-coated glass substrate via a facile sonicated sol-gel immersion method for humidity sensor applications. These nanorod arrays were grown at different Sn concentrations ranging from 0.6 to 3 at.%. X-ray diffraction patterns showed that the deposited TZO arrays exhibited a wurtzite structure. The stress/strain condition of the ZnO film metamorphosed from tensile strain/compressive stress to compressive strain/tensile stress when the Sn concentrations increased. Results indicated that 1 at.% Sn doping of TZO, which has the lowest tensile stress of 0.14 GPa, generated the highest conductivity of 1.31 S cm −1 . In addition, 1 at.% Sn doping of TZO possessed superior sensitivity to a humidity of 3.36. These results revealed that the optimum performance of a humidity-sensing device can be obtained mainly by controlling the amount of extrinsic element in a ZnO film.

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Fabrication of nanocubic ZnO/SnO2 film-based humidity sensor with high sensitivity by ultrasonic-assisted solution growth method at different Zn:Sn precursor ratios

Cited by 42 publications

References 44 publications

Standardization, Calibration, and Evaluation of Tantalum-Nano rGO-SnO2 Composite as a Possible Candidate Material in Humidity Sensors

Standardization, Calibration, and Evaluation of Tantalum-Nano rGO-SnO2 Composite as a Possible Candidate Material in Humidity Sensors

Humidity Sensors Principle, Mechanism, and Fabrication Technologies: A Comprehensive Review

Modulation of Sn concentration in ZnO nanorod array: intensification on the conductivity and humidity sensing properties

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