| abstract |
The invention discloses an up-conversion nano composite material, a preparation method thereof and application thereof in detection of procyanidine, and belongs to the technical field of biosensing. In view of developing a procyanidine analysis method which is simple to operate, has good selectivity and high sensitivity, the nano composite material provided by the invention is a nano particle with a core-shell structure, and NaYF co-doped in Yb and Tm 4 The outside of the inner core is coated with Yb doped NaYF 4 Shell layer, NaYF 4 The surface of the Yb shell is connected with Cit-CD which is marked as NaYF 4 :Yb/Tm@NaYF 4 Yb-Cit-CD. The up-conversion composite nano material has stable optical performance and good water solubility, can detect procyanidine based on fluorescence internal filtering effect, does not need expensive instruments compared with the traditional detection method, and has the advantages of low detection limit, good accuracy, simplicity and rapidness in detection. |