“…Preparation and characterization of SRF@Fe III TA and SRF@Fe III TA-NAPP SRF nanocrystals were prepared by adding SRF (50 mL, 40 mg mL À1 , methanol) into 20 mL of ultrapure water under ultrasonic according to the anti-solvent precipitation method. [20][21][22][23] Then, TA (100 mL, 40 mg mL À1 , ultrapure water) and FeCl 3 Á6H 2 O (50 mL, 10 mg mL À1 , in ultrapure water) were added immediately, after ultrasonic reaction for 5 minutes, the obtained product was collected by centrifuge at 8000 rpm for 15 min and washed 3 times with ultrapure water. NAPP (400 mL, 10 mg mL À1 , ultrapure water) was added to the above SRF@Fe III TA solution, then stirred for 10 minutes (250 rpm), centrifuged and washed 3 times with ultrapure water.…”