Figure 2: Surface morphology of the composites were determined by field-emission scanning electron microscopy (FSEM).

high-performance liquid chromatography (HPLC). (a) SEM microphotograph of the longitudinal surface of the three types of composites. (a)(a1) CS-GEL; (b)(b1) SIM-0.5; (c)(c1) SIM-1.0. Original magnification a–c: ×10,000, and a1–c1: ×50,000. (b) SEM microphotograph of the longitudinal surface of the three types of composites after incubation in PBS for 24 h. (a)(a1) CS-GEL; (b)(b1) SIM-0.5; (c)(c1) SIM-1.0. Original magnification a–c: −10,000, and a1–c1: −50,000.