Here, we report the preparation of Ce(3+) and Tb(3+) co-doped sodium yttrium fluoride nanorods and NaYF(4):Ce(3+)/Tb(3+) core-shell nanoparticles by the emulsion method. The core-shell nanoparticles are confirmed by X-ray diffraction study and transmission electron microscopy (TEM) analysis. The hexagonal crystal phase of Ce(3+)-doped sodium yttrium fluoride nanocrystals is converted to the cub...

Erbium doped bismuth borosilicate (BBS) glasses, possessing the broadest 1.55 μm near infrared (NIR) emission band among oxide glasses, stand out as excellent fiber material for optical fiber amplifiers. In this work, we demonstrate that both broadened and enhanced NIR emission of Er(3+) can be obtained by sensibly combining the effects such as mixed glass former effect, phonon-assisted energy ...

Combined UV Raman and laser-induced fluorescence (LIF) spectroscopy instruments will soon be launched onboard missions to planetary surfaces, including Mars, search for biosignatures. However, the rare earth element Ce3+, found in many common Mars-relevant minerals, can produce features within spectral window usually attributed organic compounds a LIF spectrum. This study explored detection of ...

In a preceding paper [1] it was shown that Br02oscillations can be detected in the Belousov-Zhabotinsky-system by following the absorbanee in the spectral region from 400 to 600 nm. According to the theory given by Field, Koros and Noyes [2] for the BZ-system, Br02 is responsible for the autocatalvsis of the Ce3+/Br03~-reaction. For this reason we have tried to detect Br02 as an intermediate in...