Monodisperse Lanthanide Oxysulfide Nanocrystals

Abstract

Monodisperse lanthanide oxysulfide nanoplates and short nanorods were synthesized by the thermal decomposition of molecular precursors in the presence of oxygen. The nanoplates have uniform thicknesses and further self-organize to nanowires up to micron scale. The Eu2O2S and Eu3+-doped Gd2O2S nanocrystals both show unusual fluorescence properties obviously differing from the bulk powder phosphors, which are related to the surface-modification effects.

A Simple Reducing Approach Using Amine To Give Dual Functional EuSe Nanocrystals and Morphological Tuning

“…[4][5][6] Host matrices used in these materials usually were Ln 3+ ions, [7][8][9][10] but it was problematic to prepare low-valent lanthanide materials on nano-meter scales. [11] Low-valent lanthanide mono-chalcogenide nanocrystals (NCs), and especially stable europium mono-chalcogenide EuX (X = O, S, Se, and Te) NCs started to become available with appealing optical and magnetic properties.…”

Enhanced Luminescence of La3+-Doped Gadolinium Oxysulfide with Tunable Crystalline Size

“…As a non-Kramers ion, the electronic J-level degeneracy of Tb 3+ can be destroyed by a low-symmetry crystal-field interaction, resulting in such splitting. 29 La 3+ doping did not change these characteristic peaks of Tb 3+ , but enhanced the luminescence intensity. The emission intensity at 544 nm increased monotonically as Fig.…”

Synthesis of high-quality lanthanide oxybromides nanocrystals with single-source precursor for promising applications in cancer cells imaging

“…Lanthanide-containing nanocrystals, including those of oxides [1][2][3], fluorides [4,5], chalcogenides [6][7][8], phosphates [9][10][11], vanadates [12], and oxyhalides [13,14] have attracted increasing interest recently due to their important fundamental studies and practical applications, originated from the unique 4f-electronic configurations of lanthanides. Until now, great efforts have been devoted to the controlled synthesis of nanostructured materials as their properties are dependent on their size [15], morphology [16], phase purity [17] and surface characteristics [18], as well as their chemical compositions [4,5,[9][10][11]18].…”