Fig. 6

Multiplexed Raman imaging of a H1299 cell. a Schematics and b SERS spectra of P-GERTs with different Raman reporters of 4-MBN (purple), 3-FTP (green), 3,4-DBT (red), and 2-NT (blue) immobilized in the external nanogaps. c Bright-field image and (d, e) multiplexed SERS cell imaging of a single H1299 cell. Raman image in panel d was plotted from 1340 cm⁻¹ of embedded 4-NBT reporter and images in e were plotted from the Raman signals from external Raman reporters 4-MBN (purple), 3-FTP (green), 3,4-DBT (red), and 2-NT (blue), respectively. All scale bars are 10 μm