Dense AuNP/MoS2 hybrid fabrication on fiber membranes for molecule separation and SERS detection

Abstract

Synthesis of uniform and dense metal nanostructures on the whole exposed fiber, instead of simply on the membrane surface, is necessary for controllable separation and sensitive SERS detection. Herein, uniform and dense AuNP/MoS₂ hybrids were synthesized on single 3D glass fiber (GF) surfaces, obtained by the reaction of a MoS₂ nanosheet and HAuCl₄. The chemical mechanism (CM) of the MoS₂ layers and the electromagnetic enhancement (EM) of the dense AuNPs were used to enhance the SERS sensitivity. The molecule-separation ability of the obtained GF membranes, constructed by numerous compacted fibers with dense AuNP/MoS₂ hybrids, was not destroyed, and herein, these membranes were used to separate mixed molecules. These MoS₂-based hybrid substrates show great potential for excellent paper-based separation and are sensitive SERS substrates for biological and chemical detection.