Fig. 6From: SERS Detection of Dopamine Using Label-Free Acridine Red as Molecular Probe in Reduced Graphene Oxide/Silver Nanotriangle Sol SubstrateAbsorption spectra of the AR-rGO/AgNT-DA system. (a) 8.62 μg/mL rGO/AgNT -1.75×10−6 mol/L AR- pH 6.0 PBS-0.04 mol/L NaCl; (b) (a)-100 μmol/L DA; (c) (a)-250 μmol/L DA; (d) (a)-500 μmol/L DABack to article page