Table 1.

Particle morphology of chitosan and alginate immersed in different solutions

Material	Solution	Immersion time (hour)
		0	0.5	1	2
Chitosan	Gastric juice (pH 1.2)
	PBS (pH 7.81)
	Intestinal juice (pH 9.02)
Alginate	Gastric juice (pH 1.2)
	PBS (pH 7.81)
	Intestinal juice (pH 9.02)
Pt@alginate bubbles	Gastric juice (pH 1.2)
	PBS (pH 7.81)
	Intestinal juice (pH 9.02)