Suchergebnisse

[EN] Dysprosium- doped borophosphate glasses, containing the divalent cations Mg2+, Ca2+, Sr2+, Ba2+, and Zn2+, are prepared by the melt- quenching technique. The struc-ture of the glasses is investigated by Raman, infrared, and nuclear magnetic resonance (NMR) spectroscopies and the fluorescence properties are determined. The Dy3+emission lifetime increases with an increasing ionic field strength and its maximum is observed in the Mg2+ and Zn2+ containing glasses. This result can be explained by the stronger M- O bonding which causes a rearrangement of the borophosphate network and creates a local Dy3+ environment of comparably low symmetry. This is in agree-ment with the Raman spectra and the evolution of the molar volume. The effect of the B/P variation on the emission properties of Dy3+ is investigated in a second series of glasses where the emission lifetime is found to be maximum at 10 mol% B2O3 ; This paper is a part of the dissemination activities of the project FunGlass. This project has received funding from the European Union´s Horizon 2020 research and innovation program under grant agreement No 739566. This work was also supported by the Slovak Research and Development Agency under contract No. APVV-17-0049 and by grant VEGA 1/0527/18. NST and EIK acknowledge support by the project "National Infrastructure in Nanotechnology, Advanced Materials and Micro-/Nanoelectronics" (MIS 5002772), funded by the Operational Programme "Competitiveness, Entrepreneurship and Innovation" (NSRF 2014-2020) and co-financed by Greece and the European Union (European Regional Development Fund).

Intro -- Innovation for Sustainable Development -- Preface -- Table of Contents -- Chapter 1: Innovative Materials -- Influence of Zinc Substitution on Hydroxyapatite Structure Prepared by Chemical Precipitation Method -- Improve the Electrical Properties of the ITO-PET Polymer by Plasma Technique -- Phase Transition and Microstructure Development of BaTiO3 by Thermal Development of BaTiO3 by Thermal Decomposition Method -- The Grain Structure of Nd Doped Y2NiMnO6 Ceramics Sintered at High Temperature -- Investigations on Luminescence Properties of Ce3+ Ion Doped Bismuth Borophosphate Glasses -- Investigation of Luminescence Properties of Dy3+ Doped Alkaline Earth Oxides Barium Phosphate Glasses -- Electrostriction of Dielectric Elastomer Based on Natural Rubber/Graphene Composites for Actuator Applications -- Conductivity Modification of Carbon-Based Nanocomposites -- Complete Phase Change of Y2NiMnO6 Ceramics Doped with TiO2 at High Temperature -- The Acoustic Impedance and other Properties of (1-3) Piezoceramics Polymer Composite -- Effects of Rate-Controlled Sintering on Phase Formation, Dielectric and Ferroelectric Properties of Cobalt Oxide Doped BNKT Ceramics -- Synthesis of Molybdenum Trioxide: Structure Properties and Sensing Film Preparation -- Chapter 2: Innovation in Food Chemistry, Biotechnologies and Environmental Engineering -- Correlation and Multiple Regression Model for Economic Traits of Local Rice (Oryza sativa L.) in Upland Rice System -- Antioxidant Activities of Transgenic Flower Over-Expressing FLS and TT8 Involving in Flavonoid Biosynthesis -- An Antagonism of Isolates of Root-Associated Bacteria Consortia Habituating in Banana Rhizosphere -- A High Potential in Activating Beneficial Indigenous Microbes Involving in the Meat Fermentation Process