SnO 2 thin film synthesis for organic vapors sensing at ambient temperature

Touidjen, N.H.; Bendahmane, Bouteina; Zeggar, M. Lamri; Mansour, F.; Aida, M.S.

doi:10.1016/j.sbsr.2016.11.001

Cited by 19 publications

(4 citation statements)

References 24 publications

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“…However, one of the most successful application of thin film technologies is in digital data storage, where thin films are utilized for magnetic data storage in hard disc drive devices [14], or in solid-state data storage as memory cells made up of thin film transistors and capacitors [15]. In fact, magnetic thin films are essential not only for magnetic data storage but also for other technologies involving magnetic actuation [16], thin film inductors [17], magnetic sensing and security devices [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Evidence of substrate roughness surface induced magnetic anisotropy in Ni80Fe20 flexible thin films

Belusky

Lepadatu

Naylor

et al. 2019

Journal of Magnetism and Magnetic Materials

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Experimental and computational evidence of a surface roughness induced magnetic anisotropy in NiFe thin films coated onto substrates of various surface roughnesses is reported. Magnetic coercive fields of 15 nm NiFe thin films coated on substrates with approximately 7 nm average roughness were remarkably 233% larger than identical thin films coated onto smooth substrates with < 1 nm average roughness. The NiFe films coated onto rough substrates developed hard and easy axes, normally non-existent in NiFe Permalloy. A linear correlation of the incline angles of the hard axis hysteresis loops to the average roughness values of the individual substrates was observed, with 99% correlation level. Using a modified micromagnetics theory that incorporates the effects of surface roughness, it is shown the observed magnetic anisotropy arises due to the spatial anisotropy of the surface roughness, resulting in an effective in-plane uniaxial magnetic anisotropy with energy density up to 15 kJ/m 3 .

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Section: Introductionmentioning

confidence: 99%

Evidence of substrate roughness surface induced magnetic anisotropy in Ni80Fe20 flexible thin films

Belusky

Lepadatu

Naylor

et al. 2019

Journal of Magnetism and Magnetic Materials

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“…Previously, we proved the spray pyrolysis deposition of SnO 2 films and their potential to detect vapors such as ethanol, methanol and acetone [26]. Herein, we go further into this line and investigate the influence of Mg doping levels on the VOC sensing properties of SnO 2 thin films synthesized via the spray pyrolysis process.…”

Section: Introductionmentioning

confidence: 93%

Influence of Mg Doping Levels on the Sensing Properties of SnO2 Films

Bendahmane

Tomić

Touidjen

et al. 2020

Sensors

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This work presents the effect of magnesium (Mg) doping on the sensing properties of tin dioxide (SnO2) thin films. Mg-doped SnO2 films were prepared via a spray pyrolysis method using three doping concentrations (0.8 at.%, 1.2 at.%, and 1.6 at.%) and the sensing responses were obtained at a comparatively low operating temperature (160 °C) compared to other gas sensitive materials in the literature. The morphological, structural and chemical composition analysis of the doped films show local lattice disorders and a proportional decrease in the average crystallite size as the Mg-doping level increases. These results also indicate an excess of Mg (in the samples prepared with 1.6 at.% of magnesium) which causes the formation of a secondary magnesium oxide phase. The films are tested towards three volatile organic compounds (VOCs), including ethanol, acetone, and toluene. The gas sensing tests show an enhancement of the sensing properties to these vapors as the Mg-doping level rises. This improvement is particularly observed for ethanol and, thus, the gas sensing analysis is focused on this analyte. Results to 80 ppm of ethanol, for instance, show that the response of the 1.6 at.% Mg-doped SnO2 film is four times higher and 90 s faster than that of the 0.8 at.% Mg-doped SnO2 film. This enhancement is attributed to the Mg-incorporation into the SnO2 cell and to the formation of MgO within the film. These two factors maximize the electrical resistance change in the gas adsorption stage, and thus, raise ethanol sensitivity.

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“…Touidjen et al [26] deposited a SnO2 thin film on a glass substrate to realize an organic vapor sensor that successfully detected ethanol vapor in the concentration of a few dozen ppm. The deposition was performed using spray-pyrolysis techniques using an isopropanol-aqueous SnCl2 solution as a precursor.…”

Section: Thin Films For Sensingmentioning

confidence: 99%

Glass and Glass–Ceramic Photonic Materials for Sensors

Giardino

Pugliese

Janner

2021

PoliTO Springer Series

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Recent developments in sensors are pushing for optimized materials that can increase their usage, bolster their sensitivity and enable new and more efficient transduction mechanisms. We hereby review some of the most relevant applications of glasses and glass-ceramics for photonic sensors considering the recent trends and innovative approaches. This review covers from bulk glasses to thin films and from fiber optics to nanocrystal-based and their applications in sensing.

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SnO 2 thin film synthesis for organic vapors sensing at ambient temperature

Cited by 19 publications

References 24 publications

Evidence of substrate roughness surface induced magnetic anisotropy in Ni80Fe20 flexible thin films

Evidence of substrate roughness surface induced magnetic anisotropy in Ni80Fe20 flexible thin films

Influence of Mg Doping Levels on the Sensing Properties of SnO2 Films

Glass and Glass–Ceramic Photonic Materials for Sensors

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