Insight into two-dimensional MoS2 by Raman and DFT study

• Main Author: Waterland, Mark
• Other Authors: Asian Spectroscopy Conference 2020
• Format: Conference or Workshop Item
• Language: English
• Published: 2020
• Subjects: Science::Chemistry; MoS2; Resonance Raman
• Online Access: https://hdl.handle.net/10356/144255
• Institution: Nanyang Technological University

Two-dimensional nanostructures have attracted attention for their unique physical properties and electronic structure and their enhanced catalytic activity. For MoS2 nanoribbons the most active catalytic sites are located at the edges of the two-dimensional nanosheets, while in graphene, functionalisation at the edges allows functionalisation with minimal perturbation of the sp2 graphene lattice. Vibrational spectroscopy, and Raman spectroscopy in particular is recognised as a valuable technique for characterising two-dimensional nanostructures. In this work we use IR and Raman spectroscopy to characterise the edges of these nanostructures. The low proportion of edge atoms requires increased sensitivity and selectivity and we demonstrate how plasmon resonance provides the necessary enhancement for graphene nanoribbons.