ATR	attenuated total reflection
BAW	bulk acoustic wave
BTEX	benzene, toluene, ethylbenzene and m-xylene
CCP	composite conducting polymer
CNT	reduced graphene oxide-carbon nanotube
CP	conducting polymer
CVD	chemical vapor deposition
DL	detection limit
DMMP	dimethylmethylphosphonate
EIS	electrochemical impedance spectroscopy
eN	electronic nose
FBG	fiber Bragg grating
FET	field effect transistor
FO-SPR	fiber optic-SPR
FOS	fiber optic sensor
GC-MS	gas chromatography-mass spectrometry
GCNT	reduced graphene oxide-carbon nanotubes
GLAD	glancing-angle deposition
GO	graphene oxide
GPCR	G protein coupled receptors
GTP	guanosine-5′-triphosphate
ICP	intrinsic conducting polymer
IDT	inter-digitated transducer
LPFG	long period fiber grating
LSPR	localized SPR
MIP	molecularly imprinted polymer
MO-SPR	magneto-optical SPR
MOF	metal organic framework
MOS	metal oxide semiconductor
NP	nanoparticles
NPOT	NP/oligothiophene
OBP	odorant binding protein
OR	olfactory receptor
PCF	photonic crystal fiber
PMMA	poly(methylmethacrylate)
POF	plastic optical fiber
ppb	parts per billion
ppm	parts per million
PT	polythiophene
QCM	quartz crystal microbalance
rGO	reduced GO
SAW	surface acoustic wave
SiNW	FET silicon nanowire FET
SMF	single mode fiber
SP	surface plasmon
SPP	surface plasmon polariton
SPR	surface plasmon resonance
SPW	surface plasma wave
TBD	toluene binding domain
TECS	technology enhanced clad silica
TIR	total internal reflection
TM	transverse-magnetic
TNT	2,3,6-trinitrotoluene
VOC	volatile organic compound
ZIF	zeolitic imidazolate framework