Enhanced luminescence properties of monodisperse trioctylphosphine oxide-capped Nd³⁺-doped LaF₃ nanorods without OH groups

详细信息    查看全文

• 作者：Xiaoxia Cui ; Haitao Guo ; Chaoqi Hou ; Fei Gao ; Zhongyue Wang ; Wei Wei ; Bo Peng
• 关键词：LaF3 ; Nd nanorods ; Thermolysis method ; TOPO ; Surface modification
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：2013
• 出版时间：5 September, 2013
• 年：2013
• 卷：436
• 期：Complete
• 页码：386-391
• 全文大小：1732 K

文摘

Nd³⁺-doped LaF₃ nanorods without -OH groups were synthesized via a simple thermolysis method in trioctylphosphine oxide (TOPO) solvent. FTIR spectrum indicates that TOPO molecules have been coordinated to LaF₃:Nd nanorods surface, which reduce the number of -OH groups on the nanoparticles surface effectively. The structure and morphology of as-synthesized nanorods were characterized. The possible grow mechanism of LaF₃:Nd nanorods has been also discussed in detail. The TOPO capped LaF₃:Nd nanoparticles preferentially grow along the <0 0 0 1> orientation under high temperature. Based on the absorption spectra and Judd-Ofelt theory, higher value of emission cross-section for ⁴F_3/2¡ú⁴I_11/2 transition of Nd³⁺ was calculated to be 3.22 ¡Á 10^?20 cm². The strong fluorescence intensity of LaF₃:Nd nanorods in chloroform demonstrates that these nanorods are promising luminescence materials.