Figure 1. SERS NP characterization.
(a) Illustration and (b) transmission electron micrographs of the SERS NPs. (c) the SERS spectrum of the NPs depends on the Raman reporter molecule used (here, trans-1,2-bis(4-pyridyl)-ethylene (BPE)). (d) Signal stability (based on the intensity of the 1215 cm−1 band) of SERS NPs suspension under continuous laser irradiation (785 nm; 50 mW/cm2). (e) Signal stability of SERS NPs incubated in 50% mouse serum (v/v) over a 24 hour period.