title: Significant enhancement of Sm3+ photoreduction in halide nanophase precipitated AIF3-based glasses under femtosecond laser irradiation.
abstract: The electronegativity effect for the efficient photoreduction of Sm3+ to Sm2+ in Br-modified fluoroaluminate glasses was investigated after femtosecond laser (fs) irradiation. Sm2+ luminescence was strongly observed in the higher Br-modified samples, and basing on the TEM and DSC measurements, BaBr2 nanophases were precipitated from the glass matrix in the laser focused areas. From the EDS spectra, it was found that Sm3+ can be selectively incorporated into the BaBr2 nanophases. More electrons provided by the nanophase facilitated the Sm3+ reduction in the irradiation process. Since the photoreduction efficiency of Sm3+ in Br-modified glass is evidently higher than that in Cl-modified glasses, the effect of halide ions electronegativity on Sm3+ photoreduction was identified and relevant mechanism was discussed.
authors.affiliation: Faculty of Material Science and Engineering, Kunming University of Science and Technology, 253 Xuefu RD, Kunming 650093, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Jiao
authors.forename: Xue
authors.initials: X
authors.lastname: Yu
authors.forename: Zhengwen
authors.initials: Z
authors.lastname: Yang
authors.forename: Dacheng
authors.initials: D
authors.lastname: Zhou
authors.forename: Jianbei
authors.initials: J
authors.lastname: Qiu