Metallic nanoparticles (Cu, Ag, Au) in chalcogenide and oxide glassy matrices: comparative assessment in terms of chemical bonding
Journal Title: Semiconductor Physics, Quantum Electronics and Optoelectronics - Year 2017, Vol 20, Issue 1
Abstract
Principal difference in origin of high-order optical non-linearities caused by metallic nanoparticles such as Cu, Ag and Au embedded destructively in oxide- and chalcogenide-type glassy matrices has been analyzed from the viewpoint of semi-empirical chemical bond approach. The numerical criterion has been introduced to describe this difference in terms of mean molar bond energies character for chemical interaction between unfettered components of destructed host glassy matrix and embedded guest atoms. It has been shown that “soft” covalent-bonded networks of chalcogenide glasses of As/Ge–S/Se systems differ essentially from glass-forming oxides like silica by impossibility to accommodate agglomerates of metallic nanoparticles. In contrast, such nanostructurized entities can be well stabilized in Cu-, Ag- or Au-embedded oxide glasses in full accordance with numerous experimental evidences. Recent unsubstantiated speculations trying to ascribe this ability to fully-saturated covalent matrices of chalcogenide glasses like As2S3 are analyzed and criticized as the misleading and inconclusive ones.
Authors and Affiliations
O. I. Shpotyuk, M. M. Vakiv, M. V. Shpotyuk, S. A. Kozyukhin
Keywords
Related Articles
- EP ID EP179286
- DOI 10.15407/spqeo20.01.026
- Views 75
- Downloads 0
Studying the mechanical properties of (Cu1–xAgx)7GeS5I mixed crystals by using the micro-indentation method
(Cu1–xAgx)7GeS5I mixed crystals were grown using the Bridgman–Stockbarger method. The hardness dependences on the indentation depth profiles in (Cu 1–x Ag x ) 7 GeS 5 I mixed crystals were investigated. The measurements...
The role of shear modulus and viscosity of thin organic films on the adsorption response of QCM sensors
This work reports on the results of numerical calculations of quartz microbalance (QCM) sensors response under adsorption of analyte molecules. The influence of share modulus and viscosity has been studied. It was shown...
Possible method for evaluation of virus, bacteria and yeasts infectivity by optical measurements
The possible method for evaluation of virus, bacteria and yeasts infectivity based on study of their absorption spectra has been proposed. The decrease in the samples infectivity was caused by adding the CeO2 nanoparticl...
Oxygen ion-beam modification of vanadium oxide films for reaching a high value of the resistance temperature coefficient
A new method to prepare vanadium oxide with a high temperature coefficient of resistance (TCR) and low resistance for uncooled micro-bolometers has been proposed. Amorphous vanadium oxide films with V2O3 phase inclusions...
I127 NQR spectra of Pb1–xCdxI2 and (BiI3)(1–x)(PbI2)x of mixed layered semiconductors
The results of studying the concentration and temperature dependences of NQR spectrum parameters inherent to I127 in mixed layered semiconductors Pbx–1CdxI2 and (BiI3)(1–x)(PbI2)x are presented for x ≤ 0.30 and T = 77…15...