Fig. 3: SERS performance of the Au@Al2O3-Au-Au@Al2O3 trimer arrays.
From: Plasmonic trimers designed as SERS-active chemical traps for subtyping of lung tumors
a SERS spectra of 10-9 M 4-Mpy from the Au@Al2O3-Au-Au@Al2O3 and Au-Au-Au trimers. b SERS spectra of 10−6 M toluene from the Au@Al2O3-Au-Au@Al2O3 and Au-Au-Au trimers. c Calculated adsorption energy of 4-Mpy and toluene, respectively, on Au(111) and γ-Al2O3(100) surfaces. Au, Al and O atoms are represented in gold, gray and red colors. d–f SERS spectra of 10−14 M 4-Mpy, 10−14 M 4-MBT and 10−14 M 4-ATP from the Au@Al2O3-Au-Au@Al2O3 trimer arrays, respectively (integral time 10 s). Source data are provided as a Source Data file.
