UV-laser irradiation on the soda-lime silicate glass

Modified Au-Based Nanomaterials Studied by Surface Plasmon Resonance Spectroscopy

“…15,186,187 These defects are commonly associated with network formers or modifiers (as Na or K in soda-lime and B in the borosilicates) that change their coordination and oxidising state upon irradiation, leading to the formation of color centers responsible of the glass darkening. 188 Besides the darkening, X-rays induce a slight modification in the SPR spectra, increasing the However, a detail of the resonance region (see inset in Figure 5.9b) reveals a small decrease of the reflectivity around 0.001 and a widening of the curve around 0.02 o at FWHM. These modifications of SPR curves for both cases can be studied to determinate the changes in both real and imaginary part of the refractive index with great accuracy.…”

“…can induce numerous changes in glasses, being the visible coloration one of the most obvious. 17,186,187,192 In particular, X-ray irradiation can induce color centers in some glasses, 21,188 leading to the formation of these defects responsible of the glass darkening 193 and prompting a great interest since these color centers can be generated and bleached reversibly. 22 These and other non-visible defects generated with radiation have been investigated in a wide variety of glassy materials in the last decades, being responsible of the alteration of some physical properties of the glasses such as the optical absorption, 21,22 refractive index, 194 axial stress 195 or thermal expansion coefficient.…”

“…17,186,192 Most of these studies devoted to analyze the effect of X-ray irradiation onto glasses, are carried out by irradiating the sample and analyzing later their optical properties. 21,22,188,193 However, in situ and real time studies are necessary for a deeper understanding of the process. Otherwise, processes associated with fast dynamics can be missed.…”

Metastable defects induced by X-ray irradiation in Fe-doped soda-lime silicate glass

“…In our previous work [3,[7][8][9], we measured the X-ray irradiation-induced defects in the soda-lime silicate glass, and found that the induced visible absorption bands were presumably due to the induced nonbridging oxygen hole center. The X-ray radiation-induced defect of glasses is metastable.…”

“…Similar to semiconductors, under irradiation of glasses with high energy particles and/or photons, pairs of negative electrons and positive holes react with precursors (pre-existing defects) in the matrix, leading to absorbance in the ultraviolet and visible range [1][2][3][4]. The property of radiation-induced optical absorption is one of the important problems that restrict the use of glasses in optics and photonics.…”