Table 2.

Summary of reported detection limits obtained using SERS technique for PA sensing.

Substrate	Detection Limit (mol/L)	Ref.
Positively charged silver nanoparticles	2.5 × 10−5	[11]
Versatile gold-based SERS substrates	10−6	[13]
Ag nanotriangles-loaded filter paper	10−6	[3]
Ag nanoparticles-loaded porous silicon	10−8	This work