Silicate glasses, ordering

Lin, A. Kim, B. H. Ju, S. Han, W.-T. 2007. Fabrication and third-order non linearity of germano-silicate glass fiber incorporated with Au nanoparticles. Proc. SPIE-Int. Soc. Opt. Eng. 6481 64810M/64811-64810M/64817. 

Figure 2 Examples of calibration curves for silicate glasses and minerals for Li, Be, and B. Note the linear behavior over several orders of magnitude. The B example illustrates the strength of using several standards a standard mount that was not properly cleaned [e.g., Chaussidon et al., 1997] shows the effect of sample contamination in elevated B counts relative to the actual sample concentration.

Place 0.1000 g of sample into a 30-ml plastic jar having a screw cap. Add 5 ml of cold water and tiien 5 ml of cold 29 M HF. Cap tightly and set aside at room temperature until dissolution is complete (1—24 h). Nearly all silicate glass samples do not require heat for dissolution, but if heat is applied then a viable seal must be assured in order to prevent Ihe loss of boron as the fluoride. (Insoluble fluorides and unreactive oxides may remain... 

PbS nanoparticles with features of quantum dots (QDs) have been fabricated in boron-silicate glass matrix. Their mean diameter was found to be in the range of 3.4-8.2 nm from the optical spectroscopy data due to their explicit quantum confinement effect. The particle size and position of the absorption bands can be controlled through the regimes of thermal treatment of the glasses. SAXS technique showed near to monodispetse size-distribution of QDs and possible ordering within the glass matrix. 

The fabrication of PbS QDs in the boron-silicate glass matrix has been elaborated. Particle size, and correspondingly, optical absorption was shown to be controlled through the different combinations of the heat treatment. The presence of the heterogeneity areas within the glass structure has been detected with SAXS. The features in size distribution and ordering of particles have been suggested on the basis of SAXS data. 

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