Characterization of growth of anodic antimony oxide films by ellipsometry and XPS

Pérez, Omar E. Linarez; Sánchez, Miguel; Teijelo, M. López

doi:10.1016/j.jelechem.2010.04.023

Cited by 53 publications

(17 citation statements)

References 34 publications

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“…We, therefore, correct the observed chemical shifts by the difference in relaxation energy estimated experimentally using the Auger parameter concept. 30,31 After this correction, we compared the resulting experimental initial state chemical shifts to the calculated ones. For Sb the final state effect in the Sb 4d spectra is rather large and estimated to be about 1 eV; therefore, the experimentally observed chemical shift is mostly due to the final state effect.…”

Section: Resultsmentioning

confidence: 99%

“…The chemical shifts in the Sb 4 d and Te 4 d spectra for the species occurring at the surface are generally in good agreement with the calculated ones if the final state effects are properly taken into account. We, therefore, correct the observed chemical shifts by the difference in relaxation energy estimated experimentally using the Auger parameter concept. , After this correction, we compared the resulting experimental initial state chemical shifts to the calculated ones. For Sb cations, the final state effect in the Sb 4 d spectra is rather large and estimated to be about 1 eV; therefore, the experimentally observed chemical shift is mostly due to the final state effect.…”

Section: Results and Discussionmentioning

confidence: 99%

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Rapid Surface Oxidation of Sb₂Te₃ as Indication for a Universal Trend in the Chemical Reactivity of Tetradymite Topological Insulators

et al. 2016

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Within the last few years topological insulators (TIs) have attracted a lot of interest due to their unique electronic structure with spin-polarized topological surface states (TSSs), which may pave the way for these materials to have a great potential in multiple applications. However, to enable consideration of TIs as building blocks for novel devices, stability of TSSs towards oxidation should be tested. Among the family of TIs with tetradymite structure, Sb 2 Te 3 is of p-type and appears to be the least explored material since its TSS is unoccupied in the ground state, a property that allows the use of optical excitations to generate spin currents relevant for spintronics. Here, we report relatively fast surface oxidation of Sb 2 Te 3 under ambient conditions. We show that the clean surface reacts rapidly with molecular oxygen and slowly with water, and that humidity plays an important role at the stage of the oxide-layer growth. In humid air, we show that Sb 2 Te 3 oxidizes in a time scale of minutes to hours, and much faster than other tetradymite TIs. The high surface reactivity revealed by our experiments is of critical importance and must be taken into account for the production and exploitation of novel TI-based devices using Sb 2 Te 3 as working material. Our results provide a fundamental and comprehensive understanding of the universal trend underlying the chemical reactivity of TIs.2

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Section: Resultsmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Rapid Surface Oxidation of Sb₂Te₃ as Indication for a Universal Trend in the Chemical Reactivity of Tetradymite Topological Insulators

et al. 2016

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“…XPS experiments were performed to determine the chemical composition of the oxide layer generated by anodizing using 0.19 or 1.0 A•cm −2 current density, and sealing using H 2 O or 6 wt.% Na 2 Cr 2 O 7 solution, on the AA2099 alloy. Figure 6 (a-h (Romios et al, 2005;Pérez et al, 2010;Abrahami et al, 2015), see Fig. 6 (b,d,f,h).…”

Section: Xps Surface Analysismentioning

confidence: 99%

Efecto del tratamiento de sellado en el comportamiento frente a corrosión de la aleación anodizada de aluminio-litio AA2099

et al. 2020

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El comportamiento frente a corrosión de la aleación de aluminio AA2099 anodizado en solución de H2SO4, aplicando dos densidades de corriente diferentes, 0,19 o 1,0 A·cm−2, con dos tratamientos de sellado diferentes en H2O y en Na2Cr2O7 (6% peso) a 95 °C, se ha estudiado en disoluciones de NaCl (3,5% peso) y de H2SO4 (10% vol). La aleación AA2099 se usa ampliamente en aplicaciones aeronáuticas, por tanto, se requiere que presente un buen comportamiento frente a la corrosión en ambientes de cloruro y lluvia ácida. La morfología de la superficie de la película anodizada se caracterizó por microscopía electrónica de barrido (MEB), se estudió el comportamiento frente a corrosión electroquímica empleando la impedancia electroquímica (EIS), y finalmente la caracterización de la composición química de la superficie se reveló por espectroscopía de fotoelectrones de rayos X (XPS). Se encontró que el tratamiento de sellado con Na2Cr2O7 (6% peso), genera una capa pasiva más homogénea y compacta, y tiende a aumentar la resistencia a la transferencia de carga, mejorando así el comportamiento frente a corrosión del AA2099 anodizado.

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“…4b shows the XPS spectrum of Sb 3d 5/2 , the peak observed around 350.6 eV may be assigned to the overlapped Sb 3d 5/2 /O 1s This journal is © The Royal Society of Chemistry 2014 peaks. 23 The 350.6 eV is close to binding energy of the Sb 3d 5/2 of Sb 2 O 5 (350.5 eV), 24 indicating that predominant Sb species near the surface is Sb (V).…”

Section: Resultsmentioning

confidence: 80%

Study on the preparation and characteristics of the Li–Mn–Sb–O nanocomposite as a cathode material for Li-ion batteries

et al. 2014

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Li-Mn-Sb-O composites (n Li : n Mn : n Sb ¼ 1.1 : 2 : 0.1) were synthesized via a ball milling technique and a solid state reaction method. The morphology, structure and electrochemical behavior were characterized by means of SEM, X-ray diffraction analysis and electrochemical charge-discharge tests. XRD analysis confirms that the as-prepared product is a complex composite of antimony-doped lithium manganese oxide and manganese-doped lithium antimony oxide. The composite calcinated at 750 C consists of spherical-like nanoparticles with particle size ranging from 20-100 nm. A reversible capacity of about 94 mA h g À1 remains after 40 cycles for the composite, when it is cycled at a voltage of 2.85-4.8 V. The rate performance and EIS results indicate that the capacity retention of the composite is superior to that of pure LiMn 2 O 4 .

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Characterization of growth of anodic antimony oxide films by ellipsometry and XPS

Cited by 53 publications

References 34 publications

Rapid Surface Oxidation of Sb₂Te₃ as Indication for a Universal Trend in the Chemical Reactivity of Tetradymite Topological Insulators

Rapid Surface Oxidation of Sb₂Te₃ as Indication for a Universal Trend in the Chemical Reactivity of Tetradymite Topological Insulators

Efecto del tratamiento de sellado en el comportamiento frente a corrosión de la aleación anodizada de aluminio-litio AA2099

Study on the preparation and characteristics of the Li–Mn–Sb–O nanocomposite as a cathode material for Li-ion batteries

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Characterization of growth of anodic antimony oxide films by ellipsometry and XPS

Cited by 53 publications

References 34 publications

Rapid Surface Oxidation of Sb2Te3 as Indication for a Universal Trend in the Chemical Reactivity of Tetradymite Topological Insulators

Rapid Surface Oxidation of Sb2Te3 as Indication for a Universal Trend in the Chemical Reactivity of Tetradymite Topological Insulators

Efecto del tratamiento de sellado en el comportamiento frente a corrosión de la aleación anodizada de aluminio-litio AA2099

Study on the preparation and characteristics of the Li–Mn–Sb–O nanocomposite as a cathode material for Li-ion batteries

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Rapid Surface Oxidation of Sb₂Te₃ as Indication for a Universal Trend in the Chemical Reactivity of Tetradymite Topological Insulators

Rapid Surface Oxidation of Sb₂Te₃ as Indication for a Universal Trend in the Chemical Reactivity of Tetradymite Topological Insulators