CO gas sensing properties in Pd-added ZnO sensors

Moon, Won-Taek; Jun, Youn-Ki; Kim, Hyun-Su; Kim, Wonsik; Hong, Seong‐Hyeon

doi:10.1007/s10832-007-9377-y

Cited by 32 publications

(7 citation statements)

References 16 publications

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“…The presence of noble metal NPs minimizes the effect of humidity and provides stability to the sensor material. 52,53 The aim of this study is to optimize the ratio of Ag and Pt in Ag-Pt bimetallic nanoparticles to enhance the sensitivity, selectivity, and stability and reduce the working temperature of the ZnO nanomaterial. In this regard, we have prepared ZnO nanosheet structures via a simple solvothermal route and decorated them with different combinations of Ag-Pt nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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ZnO Nanosheets Decorated with Ag-Pt Nanoparticles for Selective Detection of Ethanol

Kumar,

Lawaniya,

Nelamarri

et al. 2023

ACS Appl. Nano Mater.

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Zinc oxide nanosheets were synthesized using a facile solvothermal route and decorated with presynthesized Ag-Pt nanoparticles to design a selective ethanol gas sensor working at a relatively lower temperature. The produced nanostructures were engaged via several characterization techniques such as field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy to investigate the topographical and structural properties as well as elemental composition. Then, the nanostructures were utilized to fabricate gas sensor devices and deployed to estimate ethanol gas sensing capabilities to optimize the synergistic effect of Ag and Pt concentration in Ag–Pt bimetallic nanoparticles. The selective response was witnessed by the 1:1 Ag:Pt-ZnO sample at a temperature of 175 °C toward ethanol gas with good stability and reproducibility. Furthermore, the enhancement in gas sensing performance was investigated and found that the optimal amount of Ag and Pt can provide a synergistic effect to zinc oxide for the improvement of highly selective real-time detection of ethanol gas.

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Section: Introductionmentioning

confidence: 99%

“…To eliminate the effect of humidity on sensor performance, noble metal nanoparticle decoration is a fruitful suggestion. The presence of noble metal NPs minimizes the effect of humidity and provides stability to the sensor material. , …”

Section: Introductionmentioning

confidence: 99%

ZnO Nanosheets Decorated with Ag-Pt Nanoparticles for Selective Detection of Ethanol

Kumar,

Lawaniya,

Nelamarri

et al. 2023

ACS Appl. Nano Mater.

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“…On the other hand, thick film sensors are more versatile and amenable for large -scale production. There are some reports on thick film sensors with highly claimed samples [5,6] and a few on the sensing of ethanol (EtOH) at an operating temperature of 332 o C [7]. There is hardly any report on liquefied petroleum gas (LPG) sensors based on ZnO.…”

Section: Introductionmentioning

confidence: 99%

STUDY THE RESPONSE OF GAS SENSOR USING ZnO NANORODS SYNTHESIZED BY HYDROTHERMAL METHOD

Han¹

2018

JST

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Low-dimensional nano structures ZnO are potential material for optoelectronicand gassensing applications. The syntheses of a large quantity of ZnO nanostructures play an important role for practical applications for future. In the paper, we propose hydrothermal reduction method to synthesize large quantities ZnO nanorods under atmospheric pressure and without using any catalysts. As-prepared ZnO nanorods exhibited a hexagonal wurtzite crystal structure. For sensing properties, ZnO nanorods were coated on the Pt interdigitated microelectrodes arrays and examined at operating temperatures of 200 to 350 o C for the detection capacity of NO 2 gas. The changes in response resistance revealed that the sensor exhibited a high sensing performance for low concentrations of NO 2 gas (0.5 ppm). Additionally, the ZnO nanowires sensors have a good performance to ethanol.

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“…Although ZnO itself has an active gas response, its gas-sensing performance can be enhanced by the addition of a palladium (Pd) catalyst, which can be incorporated either via doping or embedding particles within the film [ 4 , 7 , 24 – 28 ]. Furthermore, Pd thin films have been studied as a Schottky barrier contact for ZnO-based gas sensors [ 12 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Embedded Pd Microstructures on the Flat-Band-Voltage Operation of Room Temperature ZnO-Based Liquid Petroleum Gas Sensors

Ali

Thompson

Jasim

et al. 2013

Sensors

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Three methods were used to fabricate ZnO-based room temperature liquid petroleum gas (LPG) sensors having interdigitated metal-semiconductor-metal (MSM) structures. Specifically, devices with Pd Schottky contacts were fabricated with: (1) un-doped ZnO active layers; (2) Pd-doped ZnO active layers; and (3) un-doped ZnO layers on top of Pd microstructure arrays. All ZnO films were grown on p-type Si(111) substrates by the sol-gel method. For devices incorporating a microstructure array, Pd islands were first grown on the substrate by thermal evaporation using a 100 μm mesh shadow mask. We have estimated the sensitivity of the sensors for applied voltage from –5 to 5 V in air ambient, as well as with exposure to LPG in concentrations from 500 to 3,500 ppm at room temperature (300 K). The current-voltage characteristics were studied and parameters such as leakage current, barrier height, reach-through voltage, and flat-band voltage were extracted. We include contributions due to the barrier height dependence on the electric field and tunneling through the barrier for the studied MSM devices. The Pd-enhanced devices demonstrated a maximum gas response at flat-band voltages. The study also revealed that active layers consisting of Pd microstructure embedded ZnO films resulted in devices exhibiting greater gas-response as compared to those using Pd-doped ZnO thin films or un-doped active layers.

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CO gas sensing properties in Pd-added ZnO sensors

Cited by 32 publications

References 16 publications

ZnO Nanosheets Decorated with Ag-Pt Nanoparticles for Selective Detection of Ethanol

ZnO Nanosheets Decorated with Ag-Pt Nanoparticles for Selective Detection of Ethanol

STUDY THE RESPONSE OF GAS SENSOR USING ZnO NANORODS SYNTHESIZED BY HYDROTHERMAL METHOD

Effect of Embedded Pd Microstructures on the Flat-Band-Voltage Operation of Room Temperature ZnO-Based Liquid Petroleum Gas Sensors

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