scholarly journals Effect of Boron in a Hierarchical Nanoporous Layer Formation on Silicate Glass

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1817
Author(s):  
Takumi Ito ◽  
Erika Tabata ◽  
Yuki Ushioda ◽  
Takuya Fujima
Keyword(s):  
Silicate Glass ◽  
Photoelectron Spectroscopy ◽  
Alkaline Earth ◽  
Alkaline Earth Metals ◽  
Layer Formation ◽  
X Ray ◽  
Formation Behavior ◽  
Nanoporous Layer ◽  
Skeleton Structure

A hierarchical nanoporous layer (HNL) can be formed on the silicate glass surface by simple alkali etching. Though it reportedly exhibits various useful functions, such as superhydrophilicity, optical anti-reflection, and material impregnation, the principle of its formation still remains unclear. In this study, HNL formation behavior was experimentally investigated while using scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) to clarify the role of boron contained in glass. As a result, it was found that HNL formation was significantly promoted by boron, which was rapidly eluted prior to alkali and alkaline earth metals. This suggests that boron, which forms the skeleton structure of glass together with Si and O, elutes to partially decompose the skeleton, and extends the elution route for HNL formation.

scholarly journals X-ray Photoelectron Studies of High-temperature Superconductors: Evidence for the Importance of Alkaline Earth Metals

1989 ◽  
Vol 42 (4) ◽  
pp. 409 ◽  
Author(s):  
JF Dobson ◽  
AE Bocquet ◽  
PC Healy ◽  
S Myhra ◽  
AM Stewart ◽  
...  
Keyword(s):  
High Temperature ◽  
Binding Energy ◽  
Photoelectron Spectroscopy ◽  
Alkaline Earth ◽  
High Temperature Superconductors ◽  
Alkaline Earth Metals ◽  
X Ray ◽  
Binding Energy Peak ◽  
Energy Peak ◽  
Superconducting Ceramics

All high�temperature superconducting ceramics so far studied contain alkaline-earth ions, and in all cases core-level X-ray photoelectron spectroscopy shows an anomalous low-binding energy peak from these ions. We argue that this may point to electron-rich alkaline earth layers. These should be highly polarisable, allowing them to facilitate uperconductivity by screening the repulsion between electrons and/or holes in the CuD layers.

Incorporation and Role of Nitrogen During Oxynitridation of Silicon Studied by Photoelectron Spectroscopy

1999 ◽  
Vol 567 ◽  
Author(s):  
Masayuki Suzuki ◽  
Yoji Saito
Keyword(s):  
Photoelectron Spectroscopy ◽  
High Vacuum ◽  
Oxide Films ◽  
Silicon Surfaces ◽  
Gaseous Mixtures ◽  
X Ray ◽  
Initial Stage ◽  
Thermal Stability Of

ABSTRACTWe tried direct oxynitridation of silicon surfaces by remote-plasma-exited nitrogen and oxygen gaseous mixtures at 700°C in a high vacuum. The oxynitrided surfaces were investigated with in-situ X-ray photoelectron spectroscopy. With increase of the oxynitridation time, the surface density of nitrogen gradually increases, but that of oxygen shows nearly saturation behavior after the rapid increase in the initial stage. We also annealed the grown oxynitride and oxide films to investigate the role of the contained nitrogen. The desorption rate of oxygen from the oxynitride films is much less than that from oxide films. We confirmed that nitrogen stabilizes the thermal stability of these oxynitride films.

X-Ray Photoelectron Spectroscopy Study of Surface-Modified Silicate Glass

2019 ◽  
Vol 55 (2) ◽  
pp. 180-184
Author(s):  
A. Yu. Teterin ◽  
Yu. A. Teterin ◽  
K. Yu. Maslakov ◽  
E. N. Murav’ev ◽  
V. F. Solinov ◽  
...  
Keyword(s):  
Silicate Glass ◽  
Photoelectron Spectroscopy ◽  
Spectroscopy Study ◽  
X Ray ◽  
Surface Modified

Niobium-bearing arsenides and germanides from elemental mixtures not involving niobium: a new twist to an old problem in solid-state synthesis

2018 ◽  
Vol 74 (5) ◽  
pp. 623-627 ◽  
Author(s):  
Sviatoslav Baranets ◽  
Hua He ◽  
Svilen Bobev
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Diffraction Data ◽  
Alkaline Earth ◽  
Alkaline Earth Metals ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Temperature Reactions ◽  
First Time ◽  
Synthetic Work

Three isostructural transition-metal arsenides and germanides, namely niobium nickel arsenide, Nb0.92(1)NiAs, niobium cobalt arsenide, NbCoAs, and niobium nickel germanide, NbNiGe, were obtained as inadvertent side products of high-temperature reactions in sealed niobium containers. In addition to reporting for the very first time the structures of the title compounds, refined from single-crystal X-ray diffraction data, this article also serves as a reminder that niobium containers may not be suitable for the synthesis of ternary arsenides and germanides by traditional high-temperature reactions. Synthetic work involving alkali or alkaline-earth metals, transition or early post-transition metals, and elements from groups 14 or 15 under such conditions may yield Nb-containing products, which at times could be the major products of such reactions.

scholarly journals The Influence of Alkali and Alkaline Earth Metals and the Role of Acid Pretreatments in Production of Sugars from Switchgrass Based on Solvent Liquefaction

2014 ◽  
Vol 28 (2) ◽  
pp. 1111-1120 ◽  
Author(s):  
Xianglan Bai ◽  
Robert C. Brown ◽  
Jie Fu ◽  
Brent H. Shanks ◽  
Matthew Kieffer
Keyword(s):  
Alkaline Earth ◽  
Alkaline Earth Metals
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