Immobilization of peroxidase enzyme onto the porous silicon structure for enhancing its activity and stability

Table 2 Effect of PS layer thickness (Si wafer) on the enzymatic activity

Thickness of the porous layer	Enzyme activity	Protein
Thickness of the porous layer	(U cm^-2)	(mg cm^-2)
Crystalline silicon	No detectable activity	0.32
500 nm	0.576	2.15
4,000 nm	0.456	3.52