Analysing volatile organic compounds (VOCs) with SERS by bubbling into colloidal nanoparticles

. The technique was further evaluated with two other analytes: 2-methyl-3-mercapto-pentanol (2M3MP) and indole. The latter needed the addition of an aggregating agent (NaCl) to the nanoparticles. These findings indicate that this approach offers a promising alternative for detecting gaseous analytes using colloidal nanoparticles.