Vis	visible
NIR	near-infrared
MIR	mid-infrared
SERS	surface-enhanced Raman spectroscopy
PEF	plasmon-enhanced fluorescence
SNR	signal-to-noise ratio
SEIRAS	surface-enhanced infrared absorption spectroscopy
ATR	attenuated total reflection
SPR	surface plasmon resonance
MM	multi mode
LSPR	localized surface plasmon resonance
R6G	Rhodamine 6G
CV	crystal violet
TM	Transverse Magnetic
PCR	principal component regression
PLSR	partial least squares regression
ANN	artificial neural networks