A facile methodology for regulating the size of hexagonal NaYF4:Yb3+,Er3+ upconversion nanocrystals

作者：Li, Dongdong; Lai, Wen-Yong^*; Shao, Qiyue^*; Huang, Wei

来源：New Journal of Chemistry, 2017, 41(20): 11521-11524.

DOI：10.1039/c7nj02744c

• LUMINESCENCE

Hexagonal phase (beta-) NaYF4:Yb3+,Er3+ upconversion nanocrystals have attracted great attention due to their potential applications in a variety of fields, such as biomedical imaging, labeling, and photodynamic therapy. However, the precise adjustment of the particle size of pure beta-NaYF4:Yb3+,Er3+ nanocrystals (without doping), especially below 20 nm, is still a great challenge, which is critical for their biomedical utilization. In this paper, a facile methodology for regulating the size of beta-NaYF4:Yb3+,Er3+ upconversion nanoparticles (UCNPs) is demonstrated by varying the relative ratio of oleic acid to rare-earth acetates. The roles of oleic acid and 1-octadecene in the synthesis of UCNPs are studied in detail and their internal mechanism for the nucleation and growth of the hexagonal UCNPs is also proposed.

• 出版日期2017-10-21
• 单位东南大学; 南京邮电大学