Preparation, properties and electronic structure of SnO2

Henkel, Karsten; Haeberle, Jörg; Müller, Klaus; Janowitz, C.; Schmeißer, Dieter

doi:10.1016/b978-0-08-102096-8.00016-1

Cited by 11 publications

(8 citation statements)

References 69 publications

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“…It goes beyond common single-particle models and is expected to cover a wide range of oxidic materials. [28][29][30]33 In this multiatomic approach, the ionicity is a key parameter. The ionicity factor f i represents a direct link between the PIE model (used in eqs 2−6) and the experimental pDOS data (Figure 1) resolved by the resPES data (Figure SI-1).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Photosensitive and Rectifying Properties of Ga₂O₃ Described by Polaronic Screened Electrons and Internal Potentials

Schmeißer,

Müller,

Henkel

2023

J. Phys. Chem. C

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The photosensitive and rectifying properties of Ga2O3 are described by (n-type) intrinsic (π-) electrons. These polaronic screened multiatomic carriers populate the intrinsic defect states within the ionic gap; their spectroscopic evidence is based on resonant photoemission spectroscopy data that also provide the ionicity factor of Ga2O3 and the size of the ionic gap. The π-electron density depends on the internal potential and its photo- and field-induced dipole contributions, and it describes the observed combined ohmic-exponential carrier densities and current–voltage dependences. The π-electron dynamics is caused by pairing and dissociation dipoles in the bulk of Ga2O3. The material properties of the electrode contribute via external chemical potentials and define the criteria for ohmic and rectifying contacts. This quantitative and predictive concept not only convinces by perfect agreement with published experimental data but also points toward the achievable performance limits of UV absorbers and rectifying devices.

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Section: ■ Results and Discussionmentioning

confidence: 99%

“…The PIE model represents direct experimental access to the transport properties. It goes beyond common single-particle models and is expected to cover a wide range of oxidic materials. − , …”

Section: Resultsmentioning

confidence: 99%

Photosensitive and Rectifying Properties of Ga₂O₃ Described by Polaronic Screened Electrons and Internal Potentials

Schmeißer,

Müller,

Henkel

2023

J. Phys. Chem. C

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“…Tin(IV) dioxide (SnO 2 ) is also another promising shell material. , It does not dissolve at highly acidic and basic pH, , remains stable over a wide pH range of ca. pH 0 to 12 (from the Pourbaix diagram), and is also transparent in the visible range of the light spectrum, making it a practical material for optical coatings. Indeed, Burgess and co-workers reported on SnO 2 -Au SHINs to study steel corrosion under alkaline conditions .…”

Section: Introductionmentioning

confidence: 99%

Long-Life and pH-Stable SnO₂-Coated Au Nanoparticles for SHINERS

et al. 2022

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Shell-isolated nanoparticles (SHINs) with a 37 nm gold core and an 11 nm tin dioxide (SnO 2 ) coating exhibited long-life Raman enhancement for 3 months and a wide pH stability of pH 2–13 in comparison with conventional SiO 2 -coated SHINs. Herein, Au–SnO 2 is demonstrated as a more durable SHIN for use in the technique Shell-Isolated Nanoparticles for Enhanced Raman Spectroscopy (SHINERS).

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“…As a n-type semiconductor, SnO2 has gained enormous attention in detecting gases, such as ethanol, CO and CH4, because of its low toxicity, low cost and high response for its wide bandgap. (17)(18)(19) Generally, the specific surface area (6) and the grain sizes (20) of SnO2 are the two major factors affecting the gas sensing performance. The large specific surface area provides more active sites, enhancing the gas sensing performance.…”

Section: Introductionmentioning

confidence: 99%

Morphology genetic 3D hierarchical SnO₂ microstructures constructed by Sub 5 nm nanocrystals for highly sensitive ethanol-sensor

Yan

Zhu

et al. 2021

Nanotechnology

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SnO2 is widely used for ethanol-sensing applications due to its excellent physicochemical properties, low toxicity and high sensitivity. However it is a challenge to construct 3Dhierarchical structures with sub-5 nm primary grain particle, which is the optimized size for ethanol sensor. Herein, genetic tri-level hierarchical SnO2 microstructures are synthesised by the genetic conversion of 3D hierarchical SnS2 flowers assembled by ultrathin nanosheets. The SnS2 nanosheets are morphology genetic converted to porous nanosheets with sub-5 nm SnO2 nanoparticles during the calcination process. When used for the detecton of ethanol, the sensor exhibits a high sensitivity of 0.5 ppm (Ra/Rg = 6.8) and excellent gas-sensing response (Ra/Rg =183 to 100 ppm) with short response/recovery time (12 s/11 s). The excellent gas sensing performance is much better than that of the previous reported SnO2-based sensors. The highly sensitivity is attributed to the large surface area derived from the recrystallization and volume changes, which offers more active sites during the morphology genetic conversion from SnS2 to SnO2. Furthermore, the flower-like 3D structure enhances the stability of the materials and is beneficial for the mass diffusion dynamics of ethanol.

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Preparation, properties and electronic structure of SnO2

Cited by 11 publications

References 69 publications

Photosensitive and Rectifying Properties of Ga₂O₃ Described by Polaronic Screened Electrons and Internal Potentials

Photosensitive and Rectifying Properties of Ga₂O₃ Described by Polaronic Screened Electrons and Internal Potentials

Long-Life and pH-Stable SnO₂-Coated Au Nanoparticles for SHINERS

Morphology genetic 3D hierarchical SnO₂ microstructures constructed by Sub 5 nm nanocrystals for highly sensitive ethanol-sensor

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Preparation, properties and electronic structure of SnO2

Cited by 11 publications

References 69 publications

Photosensitive and Rectifying Properties of Ga2O3 Described by Polaronic Screened Electrons and Internal Potentials

Photosensitive and Rectifying Properties of Ga2O3 Described by Polaronic Screened Electrons and Internal Potentials

Long-Life and pH-Stable SnO2-Coated Au Nanoparticles for SHINERS

Morphology genetic 3D hierarchical SnO2 microstructures constructed by Sub 5 nm nanocrystals for highly sensitive ethanol-sensor

Contact Info

Product

Resources

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Photosensitive and Rectifying Properties of Ga₂O₃ Described by Polaronic Screened Electrons and Internal Potentials

Photosensitive and Rectifying Properties of Ga₂O₃ Described by Polaronic Screened Electrons and Internal Potentials

Long-Life and pH-Stable SnO₂-Coated Au Nanoparticles for SHINERS

Morphology genetic 3D hierarchical SnO₂ microstructures constructed by Sub 5 nm nanocrystals for highly sensitive ethanol-sensor