Commercial Gold Nanoparticles on Untreated Aluminum Foil: Versatile, Sensitive, and Cost-Effective SERS Substrate

Table 2

SERS assay results for KNO3 and paracetamol detection at AuNPs@Al foil substrate.

Chemicals	Size of AuNPs	Number of CF	C linear log range for LOD calc. and	LOD	Maximum; AEF	NP/μm^2	% AG
KNO3	40 nm	2	16 mM; 0.25 mM; 0.961	0.7 mM		62	91%

CF is centrifugation/resuspension cycle.
AEF is analytical enhanced factor; % AG is % of AuNPs agglomerated (nonsingles).