Comprehensive experimental design for the preparation and performance research of composite upconversion nanomaterials
Preparation of highly dispersed nanoparticles NaYF4∶Yb,Er nanoparticles based on hydrother-mal method,and coating of mesoporous silica(MSN)on its outer layer with further modification of polydo-pamine(PDA)and hyaluronic acid(HA)to prepare composite nanospheres UCNPS@MSN@PDA-HA.The structure and morphology were observed by transmission electron microscopy(TEM).The composition and luminescence performance were detected by infrared analyzer(FITR)and fluorescence spectrometer.The results indicate that composite nanospheres have good dispersibility and mesoporous structure,and still exhibit good upconversion luminescence effect after modification with different materials.