Thermal evolution of the chemical structure and properties of silicon oxides

Kopylov, V. B.; Aleksandrov, Krasimir; Sergeev, E. V.

doi:10.1134/s1070363208050058

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…The chemical structure of the excited states of silica at elevated temperatures An analysis of the spectra obtained in the temperature range of 298-1173K for samples of Aerosil A-300 shows [27] that a sequential increase in temperature is accompanied by a gradual degradation and disappearance of emission bands observed at standard temperatures. In this case, the intensity of the luminescent band with the center at 3615 cm -1 increases and reaches its maximum value.…”

Section: Exciton States and Cooperative Effectsmentioning

confidence: 99%

New Materials Design Using Excitonic Quantum Effects: Applications for Fuel Cells, Catalysts, Superconductive and Bioactive Materials

Kopylov¹,

Leonard²

2021

Preprint

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<p>This manauscript begins with a theoretical substantiation of the possibility of thermal (dark) generation of electronically excited states (excitons) in the structure of oxides as a fundamental quantum-chemical property that ensures their continuous activity. For the first time, experimentally, a macro-scale process flow and its quantum nature are proven using a wide range of tools. The mechanism, features of the chemical structure of electron-hole components, and their role in the formation of catalytic properties have been extensively studied. The application of these new principles for the creation of highly efficient catalysts, energy generation and energy storage devices has been evaluated.</p>

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Section: Exciton States and Cooperative Effectsmentioning

confidence: 99%

New Materials Design Using Excitonic Quantum Effects: Applications for Fuel Cells, Catalysts, Superconductive and Bioactive Materials

Kopylov¹,

Leonard²

2021

Preprint

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“…According to past studies, the singlet oxygen came from the bulk structures of the samples. The thermo-emission activity of 1 O 2 is inversely proportional to the specific surface area (SPA, which measures the total surface area per unit of mass) of investigated samples [43,44], because large SPA inhibits the emission of 1 O 2 from the volume localization. To verify the singlet oxygen emission from the oxides, an experiment was conducted to measure the SPA with a surface area analyzer (TriStar II 3020; Micromeritics, Norcross, GA, USA).…”

Section: Differentiation Of Iron Oxidesmentioning

confidence: 99%

High irradiance laser ionization mass spectrometry for direct speciation of iron oxides

Yan

et al. 2010

J. Am. Soc. Mass Spectrom.

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A novel method has been developed that allows the direct speciation analysis of iron oxides based on a modified laser ionization orthogonal time-of-flight mass spectrometer. Time resolved mass spectra were acquired for the investigation of elemental ions and oxide ions generated by a laser ionization source. Speciation methodologies, including the identification of characteristic ions and the use of ion abundance ratios were evaluated for the differentiation of the oxides. The influence of operating parameters on the distribution of cluster ions was investigated, and their mechanism of formation discussed.

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Influence of Cu diffusion conditions on the switching of Cu–SiO2-based resistive memory devices

et al. 2010

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This paper presents a study of Cu diffusion at various temperatures in thin SiO 2 films. Film composition and diffusion products were analyzed using Secondary Ion Mass Spectroscopy, Rutherford Backscattering Spectrometry, X-ray Diffraction and Raman Spectroscopy methods. We found a strong dependence of the diffused Cu concentration, which varied between 0.8 at.% and 10-3 at. %, on the annealing temperature. X-ray diffraction and Raman studies revealed that Cu does not react with the SiO 2 network and remains in elemental form after diffusion. Programmable Metallization Cell (PMC) resistive memory cells were fabricated with these Cu-diffused SiO 2 films as the active elements and device performance is presented and discussed in the context of the materials characteristics.

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Thermal evolution of the chemical structure and properties of silicon oxides

Cited by 3 publications

References 7 publications

New Materials Design Using Excitonic Quantum Effects: Applications for Fuel Cells, Catalysts, Superconductive and Bioactive Materials

New Materials Design Using Excitonic Quantum Effects: Applications for Fuel Cells, Catalysts, Superconductive and Bioactive Materials

High irradiance laser ionization mass spectrometry for direct speciation of iron oxides

Influence of Cu diffusion conditions on the switching of Cu–SiO2-based resistive memory devices

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