Combined In Situ Spectroscopies Reveal the Ligand Ordering-Modulated Photoluminescence of Upconverting Nanoparticles

文献类型： 外文期刊

第一作者： Xiao, Qingbo

作者： Xiao, Qingbo;Xi, Yonglan;Ye, Xiaomei;Xiao, Qingbo;Wang, Jian;Lin, Hongzhen;Xiao, Qingbo;Wang, Jian;Lin, Hongzhen;Tu, Datao;You, Wenwu;Chen, Xueyuan;Tu, Datao;Chen, Xueyuan;Liu, Hong

作者机构：

期刊名称：JOURNAL OF PHYSICAL CHEMISTRY C （ 影响因子：4.126； 五年影响因子：4.467 ）

ISSN： 1932-7447

年卷期： 2020 年 124 卷 42 期

页码：

收录情况： SCI

摘要： Clear understanding of the complicated interfacial effect of luminescent nanoparticles is of vital importance for their practical applications. Here, combined in situ spectroscopies based on sum-frequency generation and photoluminescence characterization of lanthanide-doped upconversion nanoparticles are established to distinguish the interfacial quenching effects from ligands and solvents. We provide clear spectroscopic evidence to demonstrate that the ligand conformation significantly influences the extent of luminescence quenching from both the ligands and solvents. Moreover, the ligand disordering induced by an enlarged surface curvature is proved to be one of the major reasons for the notorious size-dependent luminescence quenching of the upconversion nanoparticles. Finally, a conformational entropy-driven strategy is provided to increase the luminescence intensity of the upconversion nanoparticles via capping with mixed layers of oleic and dodecanoic acids. Our findings may open up new avenues for clarifying the complex interfacial photophysical issues regarding inorganic luminescent nanoparticles and promoting their practical applications.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序