Ultrathin ZIF-8 wrapping on Au-dotted Ag-nanowires for highly selective SERS-based CO2 gas detection

Abstract

Ultrathin ZIF-8 wrapping was constructed on Au-dotted Ag-nanowires to obtain Ag@Au@ZIF-8. A thin film (Ag@Au@ZIF-8 NWs/TF) was constructed to selectively adsorb and enrich CO₂ molecules, which solved the problem that SERS signals could not be detected due to the poor affinity of the metal surface and the low concentration of gas molecules.