[22p-E201-1~9] Recent Progress in Nanoscale Chemical Spectroscopy by Scanning Probe Microscopy

▲ [22p-E201-6] Electrochemical Tip-enhanced Raman Spectroscopy

〇Bin Ren¹ (1.Xiamen University)

Keywords:Raman, electrochemical, tip

We will focus on our recent efforts on electrochemical TERS (EC-TERS) instrumentation, which allows us to synergistically control the reaction by both the electrode potential and laser power and characterize the reaction at the nanometer spatial resolution on STM-based EC-TERS. We further use TERS to probe the edge-related lattice and electronic properties of atomically thin MoS₂ and show that TERS can spatially obtain distinctly different Raman features of the edge defects in mono- and bilayer MoS₂ and identify the defect types (in particular the armchair and zigzag edges) in ambient. The power of TERS demonstrated in MoS₂ can also be extended to other 2D materials, which may guide the defect engineering for desired properties.