Characterization of tin oxide thin films deposited by reactive sputtering

Stedile, Fernanda Chiarello; Barros, B. A. S. de; Leite, C. V. Barros; Freire, F.L.; Baumvol, Israel Jacob Rabin; Schreiner, W. H.

doi:10.1016/0040-6090(89)90734-7

Cited by 23 publications

(6 citation statements)

References 16 publications

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“…The formation of Sn 2+ states in SnO 2Àx structure was experimentally confirmed by Raman and Mössbauer spectroscopy [29,36,37]. Some authors assume that a relatively high conductivity of tin dioxide at low temperature is achieved due to the presence of small amounts of SnO or Sn phases [38][39][40]. It is supposed that oxygen-deficient layers are always present on surface of non-stoichiometric SnO 2 crystallites and may contribute to an increased conductivity of tin dioxide [35,[38][39][40][41].…”

Section: Discussionmentioning

confidence: 92%

“…Some authors assume that a relatively high conductivity of tin dioxide at low temperature is achieved due to the presence of small amounts of SnO or Sn phases [38][39][40]. It is supposed that oxygen-deficient layers are always present on surface of non-stoichiometric SnO 2 crystallites and may contribute to an increased conductivity of tin dioxide [35,[38][39][40][41]. In our experiment the traces of SnO and Sn 3 O 4 phases were detected by ED in SnO 2 (Ia-type) + AO samples annealed at 500°C, but further growth of the temperature up to700°C resulted in the disappearance of these phases.…”

Section: Discussionmentioning

confidence: 99%

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The nature of paramagnetic defects in tin (IV) oxide

2015

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

The nature of paramagnetic defects in tin (IV) oxide

2015

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“…Interestingly, similar phases were previously mentioned in the case of SnO x thin films obtained by reactive sputtering. [17] From the Mössbauer spectrum at 80 K and the knowledge of absolute f factor for the oxides (f SnO2 (300 K) 0.47 ± 0.56; [54,55] f SnO (300 K) 0.35 [56] ) and Sn metal (f b-Sn (300 K) 0.06 [57] ) we could estimate the fraction of oxidized material : Sn/SnO SnO 2 1/3. The b-Sn component appears as an electric quadrupole singlet with a relative transmission intensity that is strongly temperature dependent.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Tin and Tin Oxide Nanoparticles of Low Size Dispersity for Application in Gas Sensing

Nayral

Viala

Fau³

et al. 2000

Chem. Eur. J.

145

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Nanocomposite core-shell particles that consist of a Sn0 core surrounded by a thin layer of tin oxides have been prepared by thermolysis of [(Sn(NMe2)2)2] in anisole that contains small, controlled amounts of water. The particles were characterized by means of electronic microscopies (TEM, HRTEM, SEM), X-ray diffraction (XRD) studies, photoelectron spectroscopy (XPS), and Mossbauer spectroscopy. The TEM micrographs show spherical nanoparticles, the size and size distribution of which depends on the initial experimental conditions of temperature, time, water concentration, and tin precursor concentration. Nanoparticles of 19 nm median size and displaying a narrow size distribution have been obtained with excellent yield in the optimized conditions. HRTEM, XPS, XRD and Mossbauer studies indicate the composite nature of the particles that consist of a well-crystallized tin beta core of approximately equals 11 nm covered with a layer of approximately equals 4 nm of amorphous tin dioxide and which also contain quadratic tin monoxide crystallites. The thermal oxidation of this nanocomposite yields well-crystallized nanoparticles of SnO2* without coalescence or size change. XRD patterns show that the powder consists of a mixture of two phases: the tetragonal cassiterite phase, which is the most abundant, and an orthorhombic phase. In agreement with the small SnO2 particle size, the relative intensity of the adsorbed dioxygen peak observed on the XPS spectrum is remarkable, when compared with that observed in the case of larger SnO2 particles. This is consistent with electrical conductivity measurements, which demonstrate that this material is highly sensitive to the presence of a reducing gas such as carbon monoxide.

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“…44 Sn oxide is well suited for Mössbauer work, and a number of studies on vacuum deposited films have reported valence state changes due to nonstoichiometry. [45][46][47][48][49][50][51][52][53][54][55][56] The technique has been applied to Li ϩ -conducting Sn-In sulphide spinels for solid state batteries. 57 Considering the importance of Sn oxide in solid state ionics, we believe that a detailed study using the Mössbauer effect is well justified for this material.…”

Section: Introductionmentioning

confidence: 99%

Electrochromism in lithiated Sn oxide: Mössbauer spectroscopy data on valence state changes

Isidorsson

Granqvist

Häggström

et al. 1996

Journal of Applied Physics

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Lithiated Sn oxide films, denoted LixSnO2, were produced by reactive rf magnetron sputtering of Sn and electrochemical post-treatment. Optical transmittance and Mössbauer spectra were recorded for progressively increased lithiation. Increasing x from zero to ∼0.1 did not have any significant effect on the optical data or Mössbauer spectra, and it is likely that the lithium is located in internal double layers in the film. Further increasing x from ∼0.1 to ∼0.2 yielded significant transmittance drops and Mössbauer spectra unambiguously showing a conversion Sn4+→Sn2+. Hence the optical absorption can be reconciled with intervalency transitions as in other cathodically coloring electrochromic oxides. Electrocrystallization appeared to dominate the electrochemistry at x≳0.2.

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Characterization of tin oxide thin films deposited by reactive sputtering

Cited by 23 publications

References 16 publications

The nature of paramagnetic defects in tin (IV) oxide

The nature of paramagnetic defects in tin (IV) oxide

Synthesis of Tin and Tin Oxide Nanoparticles of Low Size Dispersity for Application in Gas Sensing

Electrochromism in lithiated Sn oxide: Mössbauer spectroscopy data on valence state changes

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