In Situ Optical Microspectroscopy Study of Isothermal Bleaching of γ-Irradiated International Simple Glass.

The isothermal bleaching of γ-irradiated glass was studied at elevated temperatures (280-340 °C) by real-time optical microspectroscopy for the first time. The study was performed on γ-irradiated (0.83 and 1.

Eu Concentration Effects in Phosphate Glasses: An Experimental Study Linking Structural, Thermal, and Optical Properties.

Phosphate glasses incorporating large concentrations of Eu ions are of interest for optical applications as their distinct red-emitting character resists deterioration with increasing Eu content. Still, the low propensity for concentration quenching in these is not well understood, and thus evaluations linking structural, thermal, and optical properties with Eu content are desired. In this work, 50PO-(50 - )BaO-EuO ( = 0, 1, 2, 4, 6 mol %) glasses pertinent to photonics were prepared by melt-quenching and further scrutinized with regards to the composition-structure-property relationship.

Nanodiamond-promoted white light emission in Eu, Dy, and Cu-containing phosphate glass: quantitative analysis and colorimetric study.

A thorough analysis of glass containing Eu O and Dy O , or Eu O , Dy O , and CuO melted together with nanodiamond powder was pursued based on measurements of optical absorption, photoluminescence (PL) emission and excitation spectra, and colorimetry. Nanodiamond facilitated the stabilization of Cu and Eu ions with blue-emitting characteristics that, along with yellow-emitting Dy and red-emitting Eu led to the white light-emitting glass. Novel intensity notations implemented in intensity-based spectral ratios, and difference intensity correlation analysis were proposed for the assessment of PL properties.

Inflection point kinetics: plasmonic transition of silver and copper doped glasses.

Two variants of an inflection point (IP) method for analysis of large sets of spectra, acquired in real time during non-plasmonic to plasmonic glass transformation are proposed. One of the variants is based on the time evolution of the spectral inflection point position, IP, while the second one follows the time evolution of the spectral inflection point slope, IP. Both methods yield activation energy (AE) of the metal precipitation in strong agreement with previously reported values, obtained the standard kinetic approaches.

Thermal and spectroscopic characterization of copper and erbium containing aluminophosphate glass.

Thermal, Raman scattering, optical absorption, and photoluminescence characterizations were carried out on aluminophosphate glass containing Cu/Cu along with near-infrared (IR) emitting Er ions of interest to photonic applications. Material synthesis was carried out by the melt-quench technique wherein Cu ions were incorporated at a high concentration by addition of 10 mol% of CuO together with SnO. The copper oxide doping was recognized to result in a decrease of the glass transition temperature of the matrix, however Er doping displayed opposite propensity.

Kinetics of copper nanoparticle precipitation in phosphate glass: an isothermal plasmonic approach.

The kinetics of copper nanoparticle (NP) precipitation in melt-quenched barium-phosphate glass has been studied by in situ isothermal optical micro-spectroscopy. A spectroscopically based approximation technique is proposed to obtain information about the activation energies of nucleation and growth in a narrow temperature range (530-570 °C). Pre-plasmonic and plasmonic NP precipitation stages are identified separated in time.

Light-induced magnetization changes in a coordination polymer heterostructure of a Prussian blue analogue and a Hofmann-like Fe(II) spin crossover compound.

Coordination polymer thin film heterostructures of the Prussian blue analogue Ni(II)b[Cr(III)(CN)6](0.7)·nH2O (NiCr-PBA) and the 3D Hofmann-like spin crossover compound Fe(azpy)[Pt(CN)4]·xH2O {azpy = 4,4'-azopyridine} have been developed, and spin transition properties have been characterized via SQUID magnetometry and Raman spectroscopy. The magnetic response of the ferromagnetic NiCr-PBA layer (T(c) ≈ 70 K) can be altered by inducing the LIESST effect (light-induced excited spin state trapping) in the coupled paramagnetic Fe(II) spin crossover material.

In situ optical microspectroscopy approach for the study of metal transport in dielectrics via temperature- and time-dependent plasmonics: Ag nanoparticles in SiO2 films.

This study proposes in situ optical microspectroscopy as a means for the investigation of particle growth and metal transport in nanocomposite systems based on the temperature- and time-dependent optical response of the material. The technique has been successfully employed for the real-time monitoring of the growth of Ag nanoparticles (NPs) in SiO(2) films deposited on soda-lime glass during thermal processing in nitrogen atmosphere. By fitting the surface plasmon resonance (SPR) profiles with spectra calculated by Mie theory in the quasi-static regime, the time variation in effective Ag particle size was determined and subsequently analyzed in the context of crystal growth theory.

Real-time monitoring of plasmonic evolution in thick Ag:SiO(2) films: nanocomposite optical tuning.

An in situ optical microspectroscopy study of the surface plasmon resonance (SPR) evolution of Ag nanoparticles (NPs) embedded in thick SiO(2) films deposited on soda-lime glass has been conducted during thermal processing in air. The temperature and time dependences of the SPR were analyzed in the context of Mie extinction and crystal growth theories and were discussed along with consideration of oxidation processes and film/substrate physicochemical interactions. At relatively high temperatures, Ag NPs were indicated to grow first through a diffusion-based process and subsequently via Ostwald ripening.