Sol–gel derived thin-film semiconductor hydrogen gas sensor

Adamyan, Arsen Z.; Adamyan, Z. N.; Aroutiounian, V. M.; Arakelyan, A.H.; Touryan, K. J.; Turner, John A.

doi:10.1016/j.ijhydene.2007.03.043

Cited by 89 publications

(42 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Reports of various technologies for hydrogen sensing include FETs [1,2], optical fibers [3,4], thermoelectric [5,6], Schottky diodes [7][8][9], surface acoustic wave devices [10,11] and metal oxides [12][13][14][15][16][17]. Metal oxide sensors are under intensive development and have been studied for decades [18,19].…”

Section: Open Accessmentioning

confidence: 99%

Fabrication of Pd Doped WO3 Nanofiber as Hydrogen Sensor

2013

View full text Add to dashboard Cite

Pd doped WO 3 fibers were synthesized by electro-spinning. The sol gel method was employed to prepare peroxopolytungstic acid (P-PTA). Palladium chloride and Polyvinyl pyrrolidone (PVP) was dissolved in the sol Pd:WO 3 = 10% molar ratio. The prepared sol was loaded into a syringe connected to a high voltage of 18.3 kV and electrospun fibers were collected on the alumina substrates. Scanning electron microscope (SEM), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques were used to analyze the crystal structure and chemical composition of the fibers after heat treatment at 500 °C. Resistance-sensing measurements exhibited a sensitivity of about 30 at 500 ppm hydrogen in air, and the response and recovery times were about 20 and 30 s, respectively, at 300 °C. Hydrogen gas sensing mechanism of the sensor was also studied.

show abstract

Section: Open Accessmentioning

confidence: 99%

Fabrication of Pd Doped WO3 Nanofiber as Hydrogen Sensor

2013

View full text Add to dashboard Cite

show abstract

“…Gas sensing properties of the MWCNTs/SnO 2 nanocomposite structures were measured by an in-house-developed and computer-controlled static gas sensor test system (Adamyan et al, 2007). The sensors were reheated and studied at different operating temperatures.…”

Section: Measurement Methodsmentioning

confidence: 99%

“…The choice of tin-oxide as a component of SnO 2 /MWCNT nanocomposite structure is conditioned by the fact that SnO 2 is a well-known basic material for metal-oxide gas sensors (Korotcenkov et al, 2009;Aroutiounian, 2007;Shankar et al, 2015). We expected that coating of functionalized MWCNTs with SnO 2 nanoparticles with admissible (close to double Debye length) sizes (Xu et al, 1991;Adamyan et al, 2003Adamyan et al, , 2007 should provide the improved performance of the gas sensor and lower its operating temperature.…”

Section: Introductionmentioning

confidence: 99%

Nanocomposite sensors of propylene glycol, dimethylformamide and formaldehyde vapors

Adamyan

Sayunts

Aroutiounian

et al. 2018

J. Sens. Sens. Syst.

View full text Add to dashboard Cite

Abstract. The results of research works related to the study of thick-film multiwall carbon nanotube-tin oxide nanocomposite sensors of propylene glycol (PG), dimethylformamide (DMF) and formaldehyde (FA) vapors are presented in this paper. These sensors were derived using hydrothermal synthesis and sol-gel methods. Investigations of response-recovery characteristics in the 50-300 • C operating temperature range reveal that the optimal operating temperature for PG, DMF and FA vapor sensors, taking into account both high response and acceptable response and recovery times are about 200 and 220 • C, respectively. The dependence of the sensor response on gas concentration is linear in all cases. Minimal propylene glycol, dimethylformamide and formaldehyde gas concentrations, where the perceptible signal was noticed, were 13, 5 and 115 ppm, respectively.

show abstract

“…[12][13][14][15][16][17][18][19][20][21][22][23] This feature helps find any difference of time dependences of electrical response and optical transmittance response, because the former is more sensitive to surface reaction and the latter is more dependent on the bulk reaction throughout the light path. The time dependences of optical reflectance due to the reflected light from the gas-film interface or that from the film-substrate interface may have some difference if diffusion of detected gas molecules/atoms needs some time to diffuse inside the material.…”

Section: A Flexibility and Versatilitymentioning

confidence: 99%

“…[9][10][11][12] In addition to different technical considerations, the designs of the setups used for characterizing gas sensing properties of materials are quite diversified. [12][13][14][15] This scenario leads to the difficulty in establishing general standards for characterizing gas sensing materials. We were thereby motivated to report the design of a characterization system used in our recent studies on gas sensing materials, which was made to be fully automatic and capable of covering the measurements of all the abovementioned parameters.…”

Section: Introductionmentioning

confidence: 99%

Versatile computer-controlled system for characterization of gas sensing materials

Zhao

Huang

Wong

et al. 2011

Review of Scientific Instruments

View full text Add to dashboard Cite

Enhanced H2 sensitivity at room temperature of ZnO nanowires functionalized by Pd nanoparticles J. Appl. Phys. 110, 084312 (2011) Expanded beam deflection method for simultaneous measurement of displacement and vibrations of multiple microcantilevers Rev. Sci. Instrum. 82, 105112 (2011) High quality factor graphene varactors for wireless sensing applications Appl. Phys. Lett. 99, 163105 (2011) The extended surface forces apparatus. IV. Precision static pressure control Rev. Sci. Instrum. 82, 103902 (2011) Effect of temperature on CO detection sensitivity of ZnO nanorod-gated AlGaN/GaN high electron mobility transistors Appl. Phys. Lett. 99, 142107 (2011) Additional information on Rev. Sci. Instrum. Design of a system used for characterizing gas sensing materials is described. It is distinctive of being able to measure electrical and optical responses of a sample simultaneously, control a number of measurement parameters, perform fast exchange of gaseous environment, and be fully controlled automatically. These features make the system to be versatile in determining most concerned performance indexes of a gas sensing material (e.g., sensitivity, stability, selectivity, response/recovery times, etc.) as functions of various combinations of measurement conditions (e.g., gas concentrations, temperature, total pressure, content of interferants, photo assist, relative humidity, soaking time in a fixed gas concentration, and number of switching cycles in a dynamic test, etc.). Rationales of the designs associated with general gas sensing mechanics are discussed.

show abstract

Sol–gel derived thin-film semiconductor hydrogen gas sensor

Cited by 89 publications

References 17 publications

Fabrication of Pd Doped WO3 Nanofiber as Hydrogen Sensor

Fabrication of Pd Doped WO3 Nanofiber as Hydrogen Sensor

Nanocomposite sensors of propylene glycol, dimethylformamide and formaldehyde vapors

Versatile computer-controlled system for characterization of gas sensing materials

Contact Info

Product

Resources

About