▎ 摘　　要

Spectroscopic investigation of different modes of interatomic bonds has fascinated the research fraternity for a very long time. Study of the C-H stretch has been of particular importance. Here, we present a versatile spectroscopic technique using a graphene-based interface and utilize it to investigate the different Raman modes of the C-H stretch between water molecules and reduced graphene oxide (rGO). We infer such changes by studying the Raman fingerprint and the background of the spectrum using a highly multimode optical fiber evanescent wave setup. With this, we are able to interrogate the different C-H peaks using visible excitation with good resolution. The technique we demonstrate is noninvasive and can sustain very high power to probe dormant or weak Raman oscillators. We believe our system provides the complete information on the evolution of the interface as it changes with temperature, allowing for the study of thermodynamic changes at the molecular level. This unprecedented selective excitation of different Raman active oscillators paves the way to the further exploration of the molecular dynamics happening at such an interface.