“…In the bulk, it has been shown that broadness in the vibrational spectrum results from the distribution of geometries. ,, The oscillations of hydrogen bonds are sensitive to the slight changes in the local surroundings and the exact geometry of the system. Further, some of the unusual line shape features of vibrational spectra are caused by Fermi resonance (a quantum mechanical coupling phenomenon) interactions. − Also, the vibrational relaxation time for an excited group can be extremely short leading to the homogenous line shape broadening of its adsorption band. , Similarly, the broadness and spectral features at the solid/liquid interface can result from a variety of reasons. The potential reasons could be the heterogeneity of the surface, − roughness of the solid surface, orientation of the liquid molecules next to solid surface, ,, packing of molecules next to solid surface, dynamics of surface hydrogen bonds, − multiple interactions between the liquid molecule and solid surface, , liquid molecular size, and the lattice spacing of the solid crystal structure .…”