Interaction of Silver Nanoparticles and Chitin Powder with Different Sizes and Surface Structures: The Correlation with Antimicrobial Activities

Table 1

Evaluation of each chitin/Ag NP composites.

	Maximal amount of Ag NPs (μg) absorbed in 1 mg chitin (μg/mg)	Half-bactericidal activity with log10CFU/mL for Ag NPs (μg) in 10 mg chitin (μg/10 mL)	Half-antifungal activity for Ag NPs (μg) in 5 mg chitin (μg/5 mL)
Chitin A	26	0.5	10
Chitin B	22	0.5	12
Chitin C	2.5	2.0	>60
Chitin G-C	20	0.5	14
Chitin D	1.5	>2.0	>60
Chitin G-D	18	0.5	15

Chitin A, powder size: average 31 μm, nanofiber-like structures.
Chitin B, powder size: average 104 μm, nanofiber-like structures.
Chitin C, powder size: average 894 μm, smooth film-like structures.
Chitin G-C, powder size: average 146 μm, nanofiber-like structures.
Chitin D, powder size: average >1500 μm, smooth film-like structures.
Chitin G-D powder size: average 181 μm, nanofiber-like structures.
Ag NPs: average diameter 5.17 ± 1.9 nm, G-: ground.