Figure 5.
Principles of multiplexed detection using the surface-enhanced Raman scattering (SERS) technique. (a) Noble metal nanoparticles, that are different in size and shape, have unique Raman signals with narrow peaks, thus they could be used as SERS tags. (b) Schematic illustration of simultaneous detection of three tumour associated antigens expressed different types of cancer cells by SERS imaging.