Table 2.

Nanoindentation data of the fibers

Mechanical properties	Modulus (GPa)	Hardness (GPa)
PLGA	1.40±0.30	0.22±0.03
PLGA/SiO2-2.5	2.20±0.46*	0.31±0.04*
PLGA/SiO2-5	4.23±0.35**	0.42±0.04**

^*P < 0.05 compared with the PLGA group.

^**P < 0.01 compared with the PLGA group.