2021/03/31 by Li Tao, Zhiyong Li, Kun Chen +11
Chemistry · Materials Science · Physics and Astronomy · #Adsorption #Chemistry #Colloidal gold #Gold and Silver Nanoparticles Synthesis and Applications #Materials science #Molecule #Nanocluster Synthesis and Applications #Nanoparticle #Nanotechnology #Optics #Optoelectronics #Plasmon #Plasmonic nanoparticles #Quantum Dots Synthesis And Properties #Raman scattering #Raman spectroscopy #Substrate (aquarium) #cond-mat.mtrl-sci #physics.app-ph #physics.chem-ph #physics.optics
paper · pdf · doi:10.1016/j.xcrp.2021.100526
published as Cell Reports Physical Science, 2021, 2, 100526
openalex created_date 2021/03/15 · arxiv created 2021/07/28 · openalex publication_date 2021/08/01 · arxiv updated 2021/08/04 · openalex updated_date 2026/08/05
Development of highly sensitive, stable, and repeatable surface-enhanced Raman scattering (SERS) substrates is crucial for analytical detection, which is a challenge for traditional metallic structures. Here, by exploiting the high surface activity of the 1T′ transition metal telluride, we fabricate high-density gold nanoparticles (AuNPs) that are prepared spontaneously in situ on the 1T′ MoTe2 atomic layers, forming a plasmonic-2D material hybrid SERS substrate. This AuNP formation is unique to the 1T′ phase, which is repressed in 2H MoTe2 with lower surface activity. The hybrid structure generates coupling effects of electromagnetic and chemical enhancements, as well as excellent molecule adsorption, leading to ultrasensitive (4 × 10−17 M) and reproducible detection. Flexible SERS tapes are demonstrated in practical applications. Our approach facilitates ultrasensitive SERS detection by a facile method, as well as an enhanced mechanistic understanding of SERS beyond plasmonic effects.