SAN/BMIPF 6 nanofibers were fabricated by an electrospinning process and used as chemiresistors for sensing alcohol vapours. A hydrophobic and air-stable ionic liquid, BMIPF 6 , was used to impart electrical conductivity to insulating SAN nanofibers. The effects of BMIPF 6 addition on the morphology of the nanofibers were explained in terms of surface tension, viscosity and conductivity. After exposing the SAN/BMIPF 6 nanofibers collected on an interdigitated electrode to alcohol vapours (ethanol, 1-propanol and 1-butanol), the resistance of the nanofibers decreased due to adsorption of alcohol molecules. The electrospun SAN/BMIPF 6 nanofibers sensor exhibited good sensitivity and reproducibility.