Fig. 1: Schematic diagrams illustrating the preparations of the plasmonic trimer arrays.
From: Plasmonic trimers designed as SERS-active chemical traps for subtyping of lung tumors
Differences in working principles between the homogeneous trimers (a) and heterogeneous trimers (b). c porous AAO nanomask transferred on a substrate. d Fabrication of the plasmonic dimers by angle-resolved shadow depositions. e optional atomic layer deposition coating after the shadow depositions. f Further modulation of the pore diameter of AAO by sputtering. g Deposition of the trap particle by final vertical e-beam deposition. h Optical photos of the fabricated samples on silicon wafer and quartz substrates. The highlighted areas in (a) and (b) represent the “hotspots” region.
