Visualising structural modification of patterned graphene nanoribbons using tip-enhanced Raman spectroscopy
Weitao Su, Ali Esfandiar, O. Lancry, Jiaqi Shao, Naresh Kumar, Marc Chaigneau
Abstract
Graphene nanoribbons (GNRs) fabricated using electron beam lithography are investigated using tip-enhanced Raman spectroscopy (TERS) with a spatial resolution of 5 nm under ambient conditions. High-resolution TERS imaging reveals a structurally modified 5-10 nm strip of disordered graphene at the edge of the GNRs. Furthermore, hyperspectral TERS imaging discovers the presence of nanoscale organic contaminants on the GNRs. These results pave the way for nanoscale chemical and structural characterisation of graphene-based devices using TERS.
Topics & Concepts
Raman spectroscopyGraphene nanoribbonsGrapheneMaterials scienceElectron-beam lithographyLithographyNanotechnologySpectroscopyCathode rayOptoelectronicsElectronResistOpticsLayer (electronics)PhysicsQuantum mechanicsGraphene research and applicationsCarbon Nanotubes in CompositesGold and Silver Nanoparticles Synthesis and Applications