Nanostructured cadmium oxide thin films for hydrogen sensor

Dhivya, P.; Prasad, Arun K.; Sridharan, M.

doi:10.1016/j.ijhydene.2012.08.098

Cited by 38 publications

(10 citation statements)

References 14 publications

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“…The response of CTN -1 sensor was higher when compared to CTN -2 and CTN -3 sensors. The response of CTN -(1, 2, 3) sensor is higher when compared to response of pure CdO film of about 0.6 % towards 500 ppm which was reported in our earlier work [19]. A brief status of current research on H 2 sensor is given in Table 1.…”

Section: Gas Sensing Propertiesmentioning

confidence: 75%

“…These were deposited by the thermal evaporation on the cleaned glass substrates by placing shadow mask. The schematics and detailed description of the sensing electrode are reported in our previous work [19]. Gas sensing experiments were performed using custom built gas sensing system [24] consisting of double walled stainless steel chamber and the sensor is placed onto the heater which was controlled by PID controller.…”

Section: Gas Sensing Studiesmentioning

confidence: 99%

“…Therefore development of sensors without adding noble catalysts is highly preferred. Several reports are available on H 2 sensing of both CdO [19,20] and TiO 2 [21][22][23] thin films. But no reports are available on the H 2 sensing properties of CdO-TiO 2 nanocomposite thin films.…”

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confidence: 99%

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CdO-TiO2 nanocomposite thin films for resistive hydrogen sensing

2015

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A resistive gas sensor for hydrogen (H 2 ) was developed using CdO-TiO 2 nanocomposite films deposited onto a glass substrate in a thickness of typically 300-450 nm by co-sputtering. X-ray diffraction patterns confirmed the formation of a perovskite CdTiO 3 phase. Field emission-scanning electron micrographs showed spherically shaped grains which decreased in size on increasing the TiO 2 concentration, most probably due to difference in the size of the ions of Cd and Ti. The nanostructured films with lower concentration of TiO 2 exhibited good response to H 2 at an operating temperature of 275°C and an operating voltage of 250 mV. The sensors give a 3 % relative resistance change on exposure to 500 ppm of H 2 , have a 45 s response time and a 90 s recovery time. The H 2 sensor described here does not require expensive additives and thus may find both civilian and industrial applications.

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Section: Gas Sensing Propertiesmentioning

confidence: 75%

Section: Gas Sensing Studiesmentioning

confidence: 99%

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CdO-TiO2 nanocomposite thin films for resistive hydrogen sensing

2015

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“…Therefore, nanomaterials have been a frequent topic in research studies and discussions of gas sensors. (4)(5)(6)(7)(8)(9)(10) In nanomaterials, the one-dimensional structure is the most common structure, including products such as nanotubes, nanowires, and nanocolumns. In this research, we used an electrochemical method to produce AAO membranes and a vacuum die-casting method to fabricate one-dimensional zinc-indium nanowires.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of High Array Zinc–Indium Oxide Nanowires and a Nanowire Gas Sensor

Kuo¹,

Huang²,

Chen

et al. 2017

Sensors and Materials

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In this research, we used anodic aluminum oxide (AAO) nanoporous membranes to produce high-density and high-regularity zinc-indium oxide nanowires, and in the process, the production control parameters could be manipulated to adjust the diameter and distribution of the nanopores on the AAO membranes to produce one-dimensional zinc-indium oxide nanowires with high aspect ratios. A vacuum die casting method was used to fill the alloy into the high aspect ratio holes to form nanowires. The prepared nanowires were soaked in sodium hydroxide solution for wet etching to remove AAO membrane. Then, the nanowires were subjected to oxidation treatment to become zinc-indium oxide nanowires, so as to increase the detectable area of the metal oxide semiconductor sensor for carbon monoxide gas as well as to plate the electrode finishing components. In the experiment, the zinc-indium bulk was subjected to differential scanning calorimetry (DSC) to determine its melting point. Scanning electron microscopy (SEM) was used for the microstructural analysis of the zinc-indium nanowires. Finally, the gas sensing properties of the zinc-indium oxide nanowires were tested by exposing the device to carbon monoxide gas and determining its sensitivity and response time.

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“…Devices and materials that are capable of selective hydrogen sensing are important for a wide range of applications, including fuel cells, hydrogen‐powered vehicles, and hydrogenation reactions. For this reason, materials for hydrogen sensing, such as VO 2 nanowires,1 cadmium oxide thin films,2 SnO 2 ‐coated carbon nanotubes,3 platinum nanowires,4 and palladium nanowires, films, and disks,5–8 have been examined extensively. All these H 2 sensors focused on the measurement of hydrogen gas in the air with high sensitivity to low concentrations of hydrogen.…”

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confidence: 99%

Polyhedral Au–Pd Core–Shell Nanocrystals as Highly Spectrally Responsive and Reusable Hydrogen Sensors in Aqueous Solution

Chiu

Huang

2013

Angewandte Chemie

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Absorption zeigt Absorption an: Die Oberflächenplasmonenresonanzbande von tetrahexaedrischen, oktaedrischen und kubischen Au/Pd‐Kern/Schale‐Nanokristallen wird bei Absorption von Wasserstoff in die Pd‐Schale stark rotverschoben. Diese reversible Spektralverschiebung könnte für die Entwicklung von Sensoren für Wasserstoffgas genutzt werden. Bei den Kern‐Schale‐Oktaedern lässt sich die Wasserstoffabsorption sogar mit dem bloßen Auge erkennen (siehe Bild).

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Nanostructured cadmium oxide thin films for hydrogen sensor

Cited by 38 publications

References 14 publications

CdO-TiO2 nanocomposite thin films for resistive hydrogen sensing

CdO-TiO2 nanocomposite thin films for resistive hydrogen sensing

Fabrication of High Array Zinc–Indium Oxide Nanowires and a Nanowire Gas Sensor

Polyhedral Au–Pd Core–Shell Nanocrystals as Highly Spectrally Responsive and Reusable Hydrogen Sensors in Aqueous Solution

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Nanostructured cadmium oxide thin films for hydrogen sensor

Cited by 38 publications

References 14 publications

CdO-TiO2 nanocomposite thin films for resistive hydrogen sensing

CdO-TiO2 nanocomposite thin films for resistive hydrogen sensing

Fabrication of High Array Zinc&ndash;Indium Oxide Nanowires and a Nanowire Gas Sensor

Polyhedral Au–Pd Core–Shell Nanocrystals as Highly Spectrally Responsive and Reusable Hydrogen Sensors in Aqueous Solution

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Fabrication of High Array Zinc–Indium Oxide Nanowires and a Nanowire Gas Sensor