Vibrational spectra and chemical imaging of cyclo[18]carbon by tip enhanced Raman spectroscopy

Abstract

Vibrational modes and tip enhanced Raman spectroscopy (TERS) of a new carbon allotrope, cyclo[18]carbon (C₁₈), were studied by density functional theory. A silver cluster tip was used to probe the interaction with C₁₈, which is dependent on the distance and the atomically resolved positions. The TERS images show the position of the CC bonds, as observed in a recent experimental report.