Modulation of optical oxygen sensitivity of H2(TPP) by using Eu3+, Gd3+ and Yb3+ ions doped silicate-based bioactive glass powders immersed in simulated body fluid

Oğuzlar, Sibel; Zeyrek Ongun, Merve; Deliormanlı, Aylin M.

doi:10.1016/j.ijleo.2023.171458

Cited by 3 publications

(1 citation statement)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In refining, fluxes such as plant ash and natural bubble alkali should be added, and limestone should be added as stabilizer. When different fluxes are added, the chemical composition of the glass is different, such as using plant ash as flux to form potassium glass [4]. Ancient glass will be weathered by the influence of burial environment, and the composition proportion of glass will change in the process of weathering, so it will affect the type of judgment [5].…”

Section: Introductionmentioning

confidence: 99%

Composition Analysis and Identification of Ancient Glassware Based on Multimodal Analysis

2023

autml

View full text Add to dashboard Cite

Based on the data of cultural relics, this paper constructs the models of Logistics regression and stepwise regression, and discusses the relationship between the changes of chemical composition before and after weathering and the factors of glass relics. First of all, the relationship between weathering and glass type, pattern and color are analyzed by Logistics regression model and chi-square test. The results show that the relationship between weathering and glass type is strong, the relationship between weathering and grain decoration is weak, and the relationship between weathering and color is weak. Then, this study established a stepwise regression model and cross-verified to reveal the statistical law of weathering chemical composition. Six independent variables of weathering, lead oxide, sodium oxide, potassium oxide, barium oxide and alumina were retained by stepwise regression analysis. Finally, the component content prediction model before weathering is established by using the mean method to predict the corresponding compound content of the weathering point before weathering under the same glass type. In addition, with the help of the multiple regression equation, the cultural relic data are substituted into the regression equation to predict the classification results, and the sensitivity is analyzed by variance test. A judgment index, bad degree, is defined to judge the sensitivity. The prediction results show that 6 of the 8 cultural relics are less bad, the sensitivity of the prediction results is weak, and the classification results are better.

show abstract

Section: Introductionmentioning

confidence: 99%

Composition Analysis and Identification of Ancient Glassware Based on Multimodal Analysis

2023

autml

View full text Add to dashboard Cite

show abstract

Preparation of trivalent rare-earth element-substituted bioactive glass robocast scaffolds for osteosarcoma treatment: structural, morphological, mechanical, drug delivery, and biological properties

Deliormanlı,

Ensoylu,

Atmaca

2024

Appl. Phys. A

View full text Add to dashboard Cite

In this study, trivalent rare-earth ion (Eu3+, Gd3+, and Yb3+)-substituted silicate-based bioactive glass scaffolds were prepared by robocasting method using sol–gel-derived bioactive glass powders for tissue engineering applications and cancer therapy. The structural, morphological, and mechanical properties of the prepared scaffolds as well as their in vitro bioactivity in simulated body fluid (SBF) were investigated in detail. In addition, an anticancer drug (5-FU) adsorption and release behavior of the scaffolds was studied as a function of time. In vitro, cytotoxicity and alkaline phosphatase activity were investigated using human skin fibroblast BJ and osteosarcoma SaOS-2 cells. Results showed that using lanthanide ion-containing (0.5, 1, 3, and 5 wt%) sol–gel-derived bioactive glass powders it was possible to successfully fabricate periodic, mesh-like patterned robocast glass scaffolds. All of the scaffolds prepared in the study sintered at 675 °C showed an amorphous structure. The compressive strength of scaffolds was in the range of 8.8 MPa to 13.6 MPa and the highest strength values were obtained in the Yb3+-containing scaffolds. Hydroxyapatite formation was obtained for the scaffolds immersed in SBF for 28 days. The fluorouracil adsorption amount was calculated to be ~ 25% for all types of scaffolds and the cumulative drug release was in the range of 20–25% depending on the dopant concentration. Results of the in vitro cell culture experiments revealed that all of the scaffolds fabricated in the study were not cytotoxic to fibroblast and osteosarcoma cells for up to 7 days under in vitro conditions. An increase was obtained for the ALP activities for both types of cells as the incubation time was increased.

show abstract

Enhancing the O2 sensitivity of [Ru(bpy)3]2+ dye by incorporating SnO2 and Ni:SnO2

Oguzlar,

Zeyrek Ongun

2024

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Oxygen (O2)-sensitive probes encapsulated in a polymeric matrix have gas sensitivity improved by adding different metal oxide semiconductors (MOSs) to the composition. In this research, O2-sensitive tris(2,2′-bipyridyl) ruthenium(II) chloride ([Ru(bpy)3]Cl2) was chosen as a fluorophore, and SnO2 and Ni:SnO2 additives were used to enhance the oxygen sensitivity of the dye. While preparing sensing agents as a form of thin film and nanofiber, dye and MOSs powders were immobilized into the polymethylmethacrylate (PMMA) matrix in close proximity to each other. The oxygen-induced intensity measurements, decay time kinetics, and kinetic response were investigated for each of the sensing slides in the concentration range of 0–100% [O2]. Signal decreases in the emission-based intensity values of all MOSs-doped [Ru(bpy)3]2+-based complexes were monitored. Compared with free form, Ni:SnO2-doped [Ru(bpy)3]2+-based nanofiber agents exhibited a 4.03-fold increase in signal change (I0/I) ratio. The nanofiber structure, which allows the sensor slide to have a higher surface/volume ratio, allows O2 gas to penetrate more effectively. This can lead to greater interaction of the gas within the sensor matrix, resulting in more sensitive detection. Higher Stern Volmer (Ksv) values, greater O2 -induced sensing capabilities, more linear spectral measurements over larger concentration ranges, and faster response and recovery times show that MOSs-doped [Ru(bpy)3]2+-based sensing agents make promising candidates as oxygen probes.

show abstract

Modulation of optical oxygen sensitivity of H2(TPP) by using Eu3+, Gd3+ and Yb3+ ions doped silicate-based bioactive glass powders immersed in simulated body fluid

Cited by 3 publications

References 43 publications

Composition Analysis and Identification of Ancient Glassware Based on Multimodal Analysis

Composition Analysis and Identification of Ancient Glassware Based on Multimodal Analysis

Preparation of trivalent rare-earth element-substituted bioactive glass robocast scaffolds for osteosarcoma treatment: structural, morphological, mechanical, drug delivery, and biological properties

Enhancing the O2 sensitivity of [Ru(bpy)3]2+ dye by incorporating SnO2 and Ni:SnO2

Contact Info

Product

Resources

About