Organic “receptor” fully covered few-layer organic–metal chalcogenides for high-performance chemiresistive gas sensing at room temperature

Abstract

Organic–metal chalcogenides (OMCs) are proposed as a new family of two-dimensional (2D) chemiresistive sensing materials. Few-layer Ag(SPh-NH₂), one of the OMCs, fully and orderly covered with predesigned –NH₂ groups as “receptors”, shows the highest sensitivity, excellent selectivity and reversibility in response to NO₂ among all the reported 2D chemiresistive sensing materials at room temperature.