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Structural and spectroscopic properties of some neodymium-boro-germanate glasses and glass ceramics embedded with silver nanoparticles |
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| Affiliation: | 1. Technical University of Cluj-Napoca, 103-105 Muncii Avenue, 400641 Cluj-Napoca, Romania;2. National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath, 400293 Cluj-Napoca, Romania;3. University of Agricultural Science and Veterinary Medicine, 3-5 Calea Manastur, 400372 Cluj-Napoca, Romania;1. College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, PR China;2. Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, PR China;1. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;2. Graduate School, Chiang Mai University, Chiang Mai 50200, Thailand;1. Technical University of Cluj-Napoca, Materials Science and Engineering Department, 103-105, Muncii Avenue, 400641, Cluj-Napoca, Romania;2. Centre for Superconductivity, Spintronics and Surface Science, Physics and Chemistry Department, Technical University of Cluj-Napoca, Memorandumului Street, No 28, 400114, Cluj-Napoca, Romania |
| Abstract: | Neodymium-boro-germanate glasses and glass ceramics (with Nd2O3 contents up to 40 mol%) embedded with silver metallic nanoparticles (AgNPs) were prepared by the melt-quenching technique. Two series of samples (with AgNPs and without AgNPs) were investigated by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, diffuse reflectance ultraviolet–visible (DR-UV–vis) spectroscopy and photoluminescence (PL) spectroscopy. XRD data reveal that for both series the samples with x < 40 mol% Nd2O3 are basically amorphous containing only small amounts of a crystalline phase (identified as crystalline B2O3) while for samples x = 40 mol% Nd2O3 an important amount of a crystalline phase (identified as the NdBO3 orthorhombic phase) is present. FT-IR spectroscopy data show that addition of controlled amounts of Nd2O3 and AgNPs changes the structural units that build up the host glass ceramic network. These changes were confirmed also by the photoluminescence spectra that show that addition of AgNPs to the host matrix produces changes at the level of emission peaks. The positive values of bonding parameter (δ) calculated based on DR-UV–vis data indicate a covalent character of the bonds from the studied samples. |
| Keywords: | Neodymium-boro-germanate glasses and glass ceramics Neodymium ions Silver nanoparticles Structural and spectroscopic properties |
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