Highly sensitive ozone sensor

Takada, Toru; Suzuki, Kengo; Nakane, Masanori

doi:10.1016/0925-4005(93)85412-4

Cited by 144 publications

(49 citation statements)

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“…is an attractive sesquioxide employed as a gas sensor, [1][2][3] in thermoelectrics, 4,5 and specially, when doped with Sn or F, as a transparent conductive oxide in many optoelectronic applications including solar cells, lightemitting diodes, and liquid-crystal displays. [6][7][8][9] In 2 O 3 crystallizes in the cubic bixbyite (C-type) structure (space group (SG) Ia-3, No.…”

Section: Pbcamentioning

confidence: 99%

Pbca-Type In₂O₃: The High-Pressure Post-Corundum phase at Room Temperature.

et al. 2014

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Section: Pbcamentioning

confidence: 99%

Pbca-Type In₂O₃: The High-Pressure Post-Corundum phase at Room Temperature.

et al. 2014

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“…The XRD peaks of In 2 O 3 were sharp in case of SDBS capping than that of CTAB capping which indicates good crystallinity of nanoparticles. The average crystallite size of the prepared In 2 O 3 nanoparticles capped by CTAB and SDBS was calculated by using Scherrer's equation 21 and was estimated as 16.6 nm and 17.4 nm respectively. The lattice parameters calculated using maximum intensity peak (222) plane were found to be 10.095Å for CTAB and 10.023Å for SDBS capped In 2 O 3 nanoparticles respectively.…”

Section: Xrd Analysismentioning

confidence: 99%

Effect of Capping Agent on the Morphology, Size and Optical Properties of In2O3 Nanoparticles

et al. 2017

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The Indium Oxide (In 2 O 3 ) nanoparticles were synthesized through Acacia gum mediated method with the surfactants CTAB (Cetyl Trimethyl Ammonium Bromide) and SDBS (Sodium Docecyl Benzene Sulfonate). The characterization of the synthesized In 2 O 3 nanoparticles was carried out by XRD, FTIR, RAMAN, TEM, SEM, EDAX, UV-Vis and PL techniques. TG-DTA analysis was performed to know the calcination temperature of In 2 O 3 nanoparticles. XRD analysis confirmed the crystalline nature of the synthesized In 2 O 3 nanoparticles. The morphology and chemical composition were characterized by TEM, SEM and EDAX respectively. It was observed that morphology and size of synthesized nanoparticles measured by TEM and SEM analysis were dependent on the type of capping agent (surfactant) used. Raman and UV-Vis spectral analysis confirmed that the band gap value of CTAB capped In 2 O 3 particles were larger than the SDBS capped In 2 O 3 particles. FTIR analysis indicated that the bands were stretched in In 2 O 3 particles capped by SDBS than by CTAB. From the photoluminescence studies (PL technique), a blue shift in the emission peaks of CTAB and SDBS capped In 2 O 3 particles was observed that indicates larger optical band gap than the bulk.

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“…11,12 To date, the use of oxide metal films as ozone sensors required an active heating element and subsequent operations at high temperatures (above 573 K), demanding a highenergy consumption for this type of sensor elements. 13,14 To overcome this difficulty, we have demonstrated that the conductivity of some of these oxides can change orders of magnitude after exposition to UV radiation and subsequent oxidation, allowing them to work as ozone sensors at room temperature. 15,16 In the present work ac impedance measurements [17][18][19] were introduced before and after UV irradiation, followed by ozone exposition, to locally try to measure and to separate the role of grains, surface grains, grain boundaries, interfaces, and electrodes on the type of sensor response obtained.…”

Section: Introductionmentioning

confidence: 99%

Zinc oxide as an ozone sensor

Martins

Fortunato

Nunes

et al. 2004

Journal of Applied Physics

185

106

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This work presents a study of intrinsic zinc oxide thin film as ozone sensor based on the ultraviolet ͑UV͒ photoreduction and subsequent ozone re oxidation of zinc oxide as a fully reversible process performed at room temperature. The films analyzed were produced by spray pyrolysis, dc and rf magnetron sputtering. The dc resistivity of the films produced by rf magnetron sputtering and constituted by nanocrystallites changes more than eight orders of magnitude when exposed to an UV dose of 4 mW/ cm 2 . On the other hand, porous and textured zinc oxide films produced by spray pyrolysis at low substrate temperature exhibit an excellent ac impedance response where the reactance changes by more than seven orders of magnitude when exposed to the same UV dose, with a response frequency above 15 kHz, thus showing improved ozone ac sensing discrimination.

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Highly sensitive ozone sensor

Cited by 144 publications

References 0 publications

Pbca-Type In₂O₃: The High-Pressure Post-Corundum phase at Room Temperature.

Pbca-Type In₂O₃: The High-Pressure Post-Corundum phase at Room Temperature.

Effect of Capping Agent on the Morphology, Size and Optical Properties of In2O3 Nanoparticles

Zinc oxide as an ozone sensor

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Highly sensitive ozone sensor

Cited by 144 publications

References 0 publications

Pbca-Type In2O3: The High-Pressure Post-Corundum phase at Room Temperature.

Pbca-Type In2O3: The High-Pressure Post-Corundum phase at Room Temperature.

Effect of Capping Agent on the Morphology, Size and Optical Properties of In2O3 Nanoparticles

Zinc oxide as an ozone sensor

Contact Info

Product

Resources

About

Pbca-Type In₂O₃: The High-Pressure Post-Corundum phase at Room Temperature.

Pbca-Type In₂O₃: The High-Pressure Post-Corundum phase at Room Temperature.