The endocytosis was efficient and rapid, as 97.5% KB cells cultured with folate-FITC-IO showed FITC uptake after 1 hour of incubation.

• 在将KB细胞与叶酸- FITC-IO纳米颗粒共培养1小时后；有97.；5%25的细胞被吞噬；说明细胞的内摄作用迅速且有效。