Tin oxide materials

Orlandi, Marcelo Ornaghi

doi:10.1016/b978-0-12-815924-8.00001-3

Cited by 28 publications

(17 citation statements)

References 24 publications

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“…The dielectric constant of Sn 3 O 4 was considered to be ∼12, which is within the same range as that of SnO 2 (9−14) 7,53,54 and SnO (6−19). 7,55 The values of n b were 3.2 × 10 24 and 7.4 × 10 24 m −3 at 200 and 300 °C, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…These results enable calculation of the bulk electron concentration in the conduction band ( n b ) using eq and assuming the Schottky approximation to be valid (i.e., the concentration of electrons in the depletion layer is negligible). The dielectric constant of Sn 3 O 4 was considered to be ∼12, which is within the same range as that of SnO 2 (9–14) ,, and SnO (6–19). , The values of n b were 3.2 × 10 24 and 7.4 × 10 24 m –3 at 200 and 300 °C, respectively. L D = k normalB T κ ε 0 e 2 n normalb where κ is the dielectric constant and ε 0 is the vacuum permittivity.…”

Section: Results and Discussionmentioning

confidence: 99%

“…One prominent benefit of SMOx gas sensors is that they can be engineered through cost-effective and versatile approaches, offering excellent compatibility for miniaturization and reasonable energy consumption. These features enable their integration into state-of-the-art sensing platforms for applications in environmental monitoring, indoor air quality management, food industries, agriculture, and healthcare. − …”

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confidence: 99%

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Modeling the Conduction Mechanism in Chemoresistive Gas Sensor Based on Single-Crystalline Sn₃O₄ Nanobelts: A Phenomenological In Operando Investigation

Suman,

Junker,

Weimar

et al. 2024

ACS Sens.

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Investigating the sensing mechanisms in semiconducting metal oxide (SMOx) gas sensors is essential for optimizing their performance across a wide range of potential applications. Despite significant progress in the field, there are still many gaps in comprehending the phenomenological processes occurring in onedimensional (1D) nanostructures. This article presents the first insights into the conduction mechanism of chemoresistive gas sensors based on single-crystalline Sn 3 O 4 nanobelts using the operando Kelvin Probe technique. From this approach, direct current (DC) electrical resistance and work function changes were simultaneously measured in different working conditions, and a correlation between the conductance and the surface band bending was established. Appropriate modeling was proposed, and the results revealed that the conduction mechanism in the single-crystalline one-dimensional nanostructures closely aligns with the behavior observed in single-crystalline epitaxial layers rather than in polycrystalline grains. Based on this assumption, relevant parameters were further estimated, including Debye length, concentration of free charge carriers, effective density of states in the conduction band, and position of the Fermi level. Overall, this study provides an effective contribution to understanding the role of surface chemistry in the transduction of the electrical signal generated from gas adsorption in single-crystalline one-dimensional nanostructures.

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Section: Resultsmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

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confidence: 99%

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Modeling the Conduction Mechanism in Chemoresistive Gas Sensor Based on Single-Crystalline Sn₃O₄ Nanobelts: A Phenomenological In Operando Investigation

Suman,

Junker,

Weimar

et al. 2024

ACS Sens.

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“…This enhancement can be justified by TiO 2 nanoparticles’ inherent characteristics regarding photons sensing. The electron–hole pair state of the TiO 2 sites has been proved to be highly reactive; thus, due to the recombination of these pairs, and photogenerated charge carriers, the quantum efficiency of this material is relatively high 32 , 33 . Xu et al 21 investigated the transparency of PC/PMMA coated with TiO 2 film with granular morphology.…”

Section: Resultsmentioning

confidence: 99%

UV-shielding properties of a cost-effective hybrid PMMA-based thin film coatings using TiO2 and ZnO nanoparticles: a comprehensive evaluation

Yousefi

Mousavi

Heris

et al. 2023

Sci Rep

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This study aimed to assess the UV-shielding features of the PMMA-based thin film coatings with the addition of TiO2 and ZnO nanoparticles as nanofillers considering different contents. Furthermore, the effect of TiO2/ZnO nanohybrids at different ratios and concentrations was examined. The XRD, FTIR, SEM, and EDX analyses characterized the prepared films' functional groups, structure, and morphology. Meanwhile, the coatings' optical properties and UV-protecting capability were investigated by ultraviolet–visible (UV–Vis) spectroscopy. The UV–Vis spectroscopic study revealed that as the concentration of nanoparticles increased in the hybrid-coated PMMA, the absorption in the UVA region increased. Overall, it can be concluded that the optimal coatings for PMMA were 0.1 wt% TiO2, 0.1 wt% ZnO, and 0.025:0.025 wt% TiO2: ZnO nanohybrid. Considering the acquired FT-IR of PMMA with different content of nanoparticles before and after exposure to the UV irradiation, for some films, it was confirmed that the polymer-based thin films degraded after 720 h, with either decreasing or increasing intensity of the degraded polymer, peak shifting, and band broadening. Notably, the FTIR results were in good agreement with UV–Vis outcomes. In addition, XRD diffraction peaks demonstrated that the pure PMMA matrix and PMMA coating films did not show any characteristic peaks indicating the presence of nanoparticles. All diffraction patterns were similar with and without any nanoparticles. Therefore, it depicted the amorphous nature of polymer thin film.

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“…It was prepared by several techniques such as sol-gel, microwave-assisted and ultrasound-assisted methods, solvothermal, pulsed laser deposition, solid-state reaction, microemulsion, hydrothermal deposition, electron beam evaporation, sonochemical, sputtering, spray pyrolysis, sonication, vapor-liquid-solid synthesis [26,29,[39][40][41][42][43][44][45]. It is an inorganic compound with a density of 6.99 g/cm 3 , and the melting point is 1624.85 C [46].…”

Section: Introductionmentioning

confidence: 99%

A review on tin dioxide gas sensor: The role of the metal oxide doping, nanoparticles, and operating temperatures

Rzaij¹,

Nawaf²,

Ibrahim³

2022

World J. Adv. Res. Rev.

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Metal oxide gas sensors have many advantages over other solid-state gas monitoring devices, including low cost, ease of manufacture, and small design. However, the shape and structure of sensing materials have a considerable impact on the performance of such sensors, posing a significant challenge for gas sensing properties on materials or dense films to attain high-sensitivity characteristics. Various tin dioxide (SnO2) nanostructures have been devised to increase gas sensing characteristics such as sensitivity, selectivity, and response time, among other characteristics. An overview of the most well-known techniques for synthesizing gas-sensing films, as well as the influence of doping with various metal oxides, nanoparticle size, and operating temperature on the gas-sensing properties of such films, is discussed in this work. The gas sensing mechanisms and the gas detection techniques are presented in detail. The metal oxide doped SnO2 showed a strong response for SO2 and NO2 gases, whereas nanoparticle doping plays a crucial effect in increasing SnO2 sensitivity towards H2, H2S, NO2, CO, Ethanol, etc. Furthermore, the effect of operating temperature on SnO2 response is discussed in this report. SnO2 has a high sensitivity over a wide temperature range (100-350 °C).

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Tin oxide materials

Cited by 28 publications

References 24 publications

Modeling the Conduction Mechanism in Chemoresistive Gas Sensor Based on Single-Crystalline Sn₃O₄ Nanobelts: A Phenomenological In Operando Investigation

Modeling the Conduction Mechanism in Chemoresistive Gas Sensor Based on Single-Crystalline Sn₃O₄ Nanobelts: A Phenomenological In Operando Investigation

UV-shielding properties of a cost-effective hybrid PMMA-based thin film coatings using TiO2 and ZnO nanoparticles: a comprehensive evaluation

A review on tin dioxide gas sensor: The role of the metal oxide doping, nanoparticles, and operating temperatures

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Tin oxide materials

Cited by 28 publications

References 24 publications

Modeling the Conduction Mechanism in Chemoresistive Gas Sensor Based on Single-Crystalline Sn3O4 Nanobelts: A Phenomenological In Operando Investigation

Modeling the Conduction Mechanism in Chemoresistive Gas Sensor Based on Single-Crystalline Sn3O4 Nanobelts: A Phenomenological In Operando Investigation

UV-shielding properties of a cost-effective hybrid PMMA-based thin film coatings using TiO2 and ZnO nanoparticles: a comprehensive evaluation

A review on tin dioxide gas sensor: The role of the metal oxide doping, nanoparticles, and operating temperatures

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Modeling the Conduction Mechanism in Chemoresistive Gas Sensor Based on Single-Crystalline Sn₃O₄ Nanobelts: A Phenomenological In Operando Investigation

Modeling the Conduction Mechanism in Chemoresistive Gas Sensor Based on Single-Crystalline Sn₃O₄ Nanobelts: A Phenomenological In Operando Investigation