A facile PDMS coating approach to room-temperature gas sensors with high humidity resistance and long-term stability
Abstract(#br)The interference from relative humidity (RH) poses a critical issue for the practical application of room-temperature gas sensors. We demonstrate herein coating gas sensors with a hydrophobic polydimethylsiloxane (PDMS) layer can significantly enhance their humidity resistance. Pd nanoparticles (NPs) decorated TiO 2 nanotubes (Pd/TiO 2 NTs) is selected as a typical room-temperature gas sensor. By a simple thermal evaporation process, a conformal PDMS layer can be coated on the nanostructured sensing material.