In this paper, preparation of SrAl2O4:Eu,Dy luminescent pigment has been investigated. Coprecipitation as a low cost and facile method was selected. X-ray diffraction patterns indicated the formation of SrAl2O4:Eu,Dy phase through calcinations process above 800 °C. Moreover, a few amount of silica caused the structural transformation to alumina silicate phase. Transparent glaze which consist of...

Two photo-luminescence bands characterized by their excitation in c-As2S3 shows a surprising similarity to those in a-AsZS3. In addition, a band in c-As2S3 can be interpreted as due to the recombination of localized excitons as well as a luminescence band in a-As2S3. The luminescence bands in a-As2S3 are discussed on the basis of the luminescence processes in c-As S 2 3' In a-As S it is suggest...

We show that near-surface defects produced by mechanical treatments and electron irradiation can significantly enhance the intensity of luminescence due to the decay of self-trapped excitons sSTEsd in single-crystal calcium fluoride during 157and 193-nm irradiation. For example, polishing can double the intensity of the STE luminescence. Defects produced by mechanical indentation can either inc...

PRINCIPLES OF LUMINESCENCE MICROSCOPY ................................•..........•...........•............ 273 Photometric Features of a Luminescence Microscope ............................................... 273 Performance Criteria................................................................................................ 276 Practical Considerations ................................. .......

Fluorescence/phosphorescence (referred in this article simply as luminescence) based-detections arguably are the most widely used detection technique for biological assays, imaging, and sensing. This is primarily due to its high detection sensitivity and the commercial availability of a large number of fluorescence probes [1-3]. Key to the usefulness of luminescence methods is the ability to se...