CO2 sensing characteristics of Sm1-xBaxCoO3 (x = 0, 0.1, 0.15, 0.2) nanostructured thick film

Chaudhari, G. N.; Padole, P. R.; Jagatap, S.V.; Pawar, M. J.

doi:10.21307/ijssis-2017-310

Cited by 3 publications

(4 citation statements)

References 17 publications

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“…The high temperature condition enables the chemical reaction between the thermally activated CO 2 molecules chemisorbed into the Pt-Pd on GaN nanowires and the negatively charged ions, resulting in the extension of the depletion region depth inside the GaN nanowires. 32,33 This reaction is enhanced as the CO 2 concentration is increased, and thus the resistance of GaN nanowires increases resultantly. The relative response to NO 2 at 100 ppm was two to four times higher than that to NH 3 at 100 ppm or CO 2 at 1000 ppm, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Suspended GaN nanowires as NO2 sensor for high temperature applications

Sim

Kim

2013

Analyst

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We propose a gas sensor operable over a wide temperature range and using suspended GaN nanowires functionalized with Pt-Pd. The sensor is batch-fabricated by directly integrating the GaN nanowires onto batch-processed silicon microelectrodes in parallel. The high thermal stability of the sensor originates from a large band gap of GaN nanowires that enables the detection of NO2 gas at an elevated temperature of up to 350 °C without a decrease in responsiveness. Exposed to NO2 at 100-1000 ppm at 350 °C, the sensor shows a linear increment in relative response with respect to the change in gas concentration. The sensor results in a two- to four-fold increase in responsiveness to NO2 at 100 ppm compared to NH3 at 100 ppm and CO2 at 1000 ppm. The nanowires suspended over a substrate provide increased surface area that could interact with gas molecules for enhanced responsiveness, and prevent any unnecessary interactions between the nanowires and the substrate.

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Section: Resultsmentioning

confidence: 99%

Suspended GaN nanowires as NO2 sensor for high temperature applications

Sim

Kim

2013

Analyst

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“…The specialized literature of the recent years reports a series of spinels and perovskites used to obtain gas sensors [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39].…”

Section: Reports From the Specialized Literature On A Series Of Oxidementioning

confidence: 99%

“…By doping with Cr 3+ , a high decrease of resistivity was obtained, while the sensitivity remains the same. Gaudhari et al [39] carried out a study on the Ba-doped nanostructured perovskite SmCoO 3 as selective sensor for CO 2 , working at a temperature of 425 C. For an Sm substitution with Ba (Sm 0.9 Ba 0.1 CoO 3 ), a decrease in the optimum operating temperature from 425 to 370 C and a diminution of the response time are obtained.…”

Section: Reports From the Specialized Literature On A Series Of Oxidementioning

confidence: 99%

Nanostructured Oxide Semiconductor Compounds with Possible Applications for Gas Sensors

Doroftei¹,

Leontie²

2018

New Uses of Micro and Nanomaterials

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Nanostructured oxide semiconductor compounds have gained a big importance, in basic and mostly in applicative researches, due to their unique properties, and their increased potential of utilization as sensors in various electronic and optoelectronic devices. The development of devices based on semiconductor materials as gas sensors has been visible during the recent years, due to their low manufacturing cost. Because the basic materials and the manufacturing processes are critical for gas sensors high performance, they need to be studied and capitalized in practice. Among the new technologies, the production of nanocrystalline materials and hybrid structures offer huge opportunities to improve sensitivity, selectivity and response time, as a consequence of the intensification of gas-sensor interaction. In this study, a series of nanostructured oxide semiconductor compounds with a spinel-type structure and perovskite, respectively, based on transition metals and synthesized by the sol-gel self-combustion method, with possible applications for resistive gas sensors, are presented.

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“…In industrialized countries, the growth of production and traffic contribute to the degradation of air quality [19,20]. In relation with an increasing interest for environmental questions all over the world, the demand of new measurements increases.…”

Section: V1 Contextmentioning

confidence: 99%