In this study, we fabricated a heat-stimulated luminous fiber (HSLF) by wet spinning. The HSLF consists of Sr₂ZnSi₂O₇: Eu2+, Dy3+ (SZSO), Y₂O₂S: Eu3+, Mg2+, Ti4+ (YOS), and heat-sensitive green TF-G pigment (HSGP). SZSO and YOS serve as a source of luminescence to yield a long afterglow system. HSGP is a heat-stimulating agent which develops the link between luminescence and temperature for HSL...

Despite recent achievements to reduce surface quenching in NaYF(4):Yb,Er nanocrystals, a complete understanding of how the nanocrystal size affects the brightness of upconversion luminescence is still incomplete. Here we investigated upconversion luminescence of Yb,Er-doped nanocrystals in a broad range of sizes from 6 nm to 45 nm (cubic or hexagonal phases), displaying an increasing red-to-gre...

in this research work, we report a simple method called reflux condensation method for synthesizing co3o4 nanoparticles using cheap chemicals such as, cobalt acetate (precursor salt), sodium monododecyl sulphate - sds (surfactant) and n, n - dimethylformamide - dmf (solvent). the prepared materials were heat treated at 200, 400, 600 and 800 oc for each 2 h to get phase pure product. the calcine...

In this thesis, the materials aspects of erbium-doped silicon (Si:Er) are studied to maximize Si:Er luminescence intensity and to improve Si:Er performance as an optoelectronic semiconductor material. Studies of erbium (Er) and silicon (Si) reactivity, erbium diffusion and solubility in silicon, Si:Er heat treatment processing with oxygen and fluorine co-implantation and the mechanism of Si:Er ...

Although luminous bacteria are among the most accessible of light-producing organisms, until recently attempts to obtain the light-producing reaction in vitro have been unsuccessful. Owing partly to the development of ultrasensitive light-detecting apparatus such as the quantum counter (l), it has been possible in our laboratory to develop procedures required to obtain a sustained bright lumine...

1. Ca and K condition the irritability of Pelagia both in regard to rhythmical contractions and general luminescence. If either ion is omitted from the solution conduction of stimuli for pulsations and luminescence does not occur, although local responses still persist. 2. When Mg is omitted from the solution, Pelagia shows hyper-irritability with respect to rhythmical contraction and general l...

Abstract Due to the special optical properties of rare earth elements, luminescent materials have been widely used in lighting, medical radiological images, detection and recording radiation field other fields. Through research analysis phosphate LaPO 4 :(Ce 3+ ,Tb ), Ca 9 Y (PO ):(Ce GdPO ) composite by hydrothermal preparation cerium-terbium co-activated, process (additives, reaction system p...

viable cell concentration and luminescence activity of p. stutzeri p16 luxab4 was measured byplate counting and luminometery in sterile and non-sterile soil adjusted to matric potential of -1500, -750 and-30 kpa. results showed that matric potential had a significant effect on survival and activity of p. stutzerip16 luxab4 in soil. p. stutzeri p16 luxab4 could survive better in hutner’s minimal...

In this research work, we report a simple method called reflux condensation method for synthesizing Co3O4 nanoparticles using cheap chemicals such as, cobalt acetate (precursor salt), sodium monododecyl sulphate - SDS (surfactant) and N, N - Dimethylformamide - DMF (solvent). The prepared materials were heat treated at 200, 400, 600 and 800 oC for each 2 h to get phase pure product. The calcine...

White light emitting diodes (LEDs) suffer from two most common drawbacks: the deficiency of red component and poor thermal stability silicone. Ce3+-doped garnet phosphors with tailor-made luminescence properties can be achieved by variations in {A}, {B}, {C} cation sites. Herein, a simultaneous ion co-substitution design strategy has been adopted to synthesize series (Y, Ca)3(Al, Mg)2(Al, Si)3O...