An "Electronic Nose" is a device capable to recognize the volatile composition of an air sample. The device consists of an array of nanoreceptors capable to transform physical or chemical information into an electric signal. Every receptor in the array reacts differently to the materials in the analyzed sample, and the combination of these responses from several receptors produces a unique volatile profile, distinguishable by quality (namely, which molecules are found in the sample?) and quantity (namely, what is the exact concentration of each molecule?).