Visualising structural modification of patterned graphene nanoribbons using tip-enhanced Raman spectroscopy

Weitao Su; Ali Esfandiar; Ophélie Lancry; Jiaqi Shao; Naresh Kumar; Marc Chaigneau

doi:10.1039/d1cc01769a

Visualising structural modification of patterned graphene nanoribbons using tip-enhanced Raman spectroscopy

Chem Commun (Camb). 2021 Jul 13;57(56):6895-6898. doi: 10.1039/d1cc01769a.

Authors

Weitao Su¹, Ali Esfandiar², Ophélie Lancry³, Jiaqi Shao⁴, Naresh Kumar⁵, Marc Chaigneau³

Affiliations

¹ School of Sciences, Hangzhou Dianzi University, Hangzhou, 310018, China. suweitao@hdu.edu.cn and College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China.
² Department of Physics, Sharif University of Technology, Tehran 11155-9161, Iran.
³ HORIBA Jobin Yvon SAS, Boulevard Thomas Gobert, Passage Jobin Yvon, 91120 PALAISEAU, France. Marc.CHAIGNEAU@horiba.com.
⁴ College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China.
⁵ Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich CH-8093, Switzerland. naresh.kumar@org.chem.ethz.ch.

PMID: 34151337
DOI: 10.1039/d1cc01769a

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.