3-ethoxythiophenol (ETP) ) may be used to functionalize gold nanoparticles for developing:Partially selective gold nanoparticle chemiresistor sensors for the quantification of benzene, toluene, ethylbenzene,p-xylene and naphthalene (BTEXN) in water samplesFlexible and tunable sensor based on monolayer-capped nanoparticles (MCNPs), with potential application in e-skin devices.gold nanoparticle-based flexible sensor array