glass surface
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2022 ◽  
Vol 88 (1) ◽  
pp. 108-116
Author(s):  
Hirofumi KAWAMURA ◽  
Souta MATSUSAKA ◽  
Hirofumi HIDAI ◽  
Akira CHIBA ◽  
Noboru MORITA

Author(s):  
Mateusz Kruszelnicki ◽  
Izabela Polowczyk ◽  
Przemyslaw B. Kowalczuk

2021 ◽  
Vol 2086 (1) ◽  
pp. 012051
Author(s):  
A Dzhinikashvili ◽  
Y Enns ◽  
R Kleimanov ◽  
A Kazakin

Abstract This paper considers the possibility of modifying the surface LK-5 glass by glass blowing methods to solve the problems of creating an atomic clock and ensuring a controlled distribution of metal nanoparticles on its surface. The evolution of the formation of a spherical profile of a glass surface on a hermetically welded cavity in a glass-silicon system was studied experimentally and theoretically. Also, the possibility of modifying the spatial parameters of arrays of nanoparticles distributed on the glass surface has been demonstrated. The obtained experimental and theoretical data demonstrate sufficient convergence.


2021 ◽  
Vol 344 ◽  
pp. 117742
Author(s):  
Alexandru-Constantin Stoica ◽  
Madalin Damoc ◽  
Vasile Tiron ◽  
Mihaela Dascalu ◽  
Adina Coroaba ◽  
...  
Keyword(s):  

Biosensors ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 448
Author(s):  
Alexey Skvortsov ◽  
Ekaterina Babich ◽  
Alexey Redkov ◽  
Andrey Lipovskii ◽  
Valentina Zhurikhina

We investigated the stability of silver nanoisland films, which were formed on glass surface by the method of out-diffusion, in biocompatible buffers and the applicability of the films in surface enhanced Raman scattering (SERS). We have shown that silver nanoisland films are stable in one of the most widespread in biological studies buffer—phosphate buffer saline (PBS), and in 1:100 water-diluted PBS, in the PBS-based buffer, in which NaCl is replaced by the same amount of NaClO4, and in acidic phosphate buffer. At the same time, the replacement of NaCl in PBS by N(CH3)4Cl leads to the degradation of the nanoislands. It was shown that after exposure to PBS the nanoisland films provided a good SERS signal from a monolayer of 1,2-di(4-pyridyl)ethylene (BPE), which makes silver nanoisland films promising for biosensor applications. Additionally, in our experiments, we registered for the first time that silver nanoparticles formed in the bulk of the samples dissolved after exposing to PBS, while nanoislands on the glass surface stayed unchanged. We associate this phenomenon with the interaction of ions contained in PBS solution with silver, which results in the shift of corresponding chemical equilibrium.


2021 ◽  
Vol 1 ◽  
pp. 143-144
Author(s):  
Felix Brandt ◽  
Martina Klinkenberg ◽  
Sébastien Caes ◽  
Jenna Poonoosamy ◽  
Wouter Van Renterghem ◽  
...  

Abstract. Immobilization of high-level and intermediate-level nuclear wastes by vitrification in borosilicate glass is a well-established process. There is a consensus between the waste management agencies of many countries and many experts that vitrified nuclear waste should be disposed of in a deep geological waste repository and therefore its long-term behavior needs to be taken into account in safety assessments. In contact with water, borosilicate glass is metastable and dissolves. In static dissolution experiments, often a surface alteration layer (SAL) forms on the dissolving glass, and later sometimes secondary phases form. Based on boron or lithium release rates, commonly three stages of glass dissolution are defined as a function of the reaction progress: (I) initial dissolution, described by a congruent glass dissolution at the highest rate, (II) residual dissolution, characterized by a glass dissolution rate several orders of magnitude lower than the initial one, and (III) resumption of glass alteration with initial rates. Microscopically, the formation of a complex SAL has been identified as a prerequisite for the slower dissolution kinetics of stage II. Stage III is typically observed under specific conditions, i.e., high temperature and/or high pH driven by the uptake of Si and Al into secondary phases. Different glass dissolution models explaining the mechanisms of the SAL formation and rate-limiting steps have been proposed and are still under debate. In this article different aspects of glass dissolution from recent studies in the literature and our own work are discussed with a focus on the microscopic aspects of SAL formation, secondary phase formation and the resumption of glass dissolution. Most of the experiments in the literature were performed under near-neutral pH conditions and at 90 ∘C, following standard procedures, to understand the fundamental mechanisms of glass dissolution. The example of interaction of glass and cementitious materials as discussed here is relevant for safety assessments because most international concepts include cement e.g., as lining, for plugs, or as part of the general construction of the repository. The aim of the investigations presented in this paper was to study the combined effect of hyperalkaline conditions and very high surface area/volume ratios (SA/V=264000m-1) on the dissolution of international simplified glass (ISG) and the formation of secondary phases at 70 ∘C in a synthetic young cement water containing Ca (YCWCa). The new results show that the SA/V ratio is a key parameter for the dissolution rate and for the formation of the altered glass surface and secondary phases. A comparison with similar studies in the literature shows that especially on the microscopic and nanoscale, different SA/V ratios lead to different features on the dissolving glass surface, even though the SA-normalized element release rates appear similar. Zeolite and Ca-silicate-hydrate phases (CSH) were identified and play a key role for the evolution of the solution chemistry. A kinetic dissolution model coupled with precipitation of secondary phases can be applied to relate the amount of dissolved glass to the evolution of the solution's pH.


2021 ◽  
Vol 1199 (1) ◽  
pp. 012048
Author(s):  
R Janík ◽  
V Vargová ◽  
J Šulcová ◽  
M Pajtášová

Abstract The present work, as one of the first scientific works, deals with the modification of the glass surface induced by DCSBD plasma discharge to increase the adhesion of decorative gold layers on glass products. In the study of such a modification, it was necessary to monitor the effectiveness of the modification of the glass surface, and subsequently it was necessary to test the resistance of the deposited gold layers in tests performed directly in operation. In the present work, the adhesion of gold to DCSBD-modified glass surfaces by plasma discharge was uniquely evaluated by image analysis.


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