Innovative Raman filters from Enspectr ensure spectral range from 7 up to 4000cm-1 with spectral resolution 3cm-1 (Stokes component) simultaneously in one shot with spectral range from -1000 to -7 cm-1 (anti-Stokes component).
Ultra-low frequency Raman analysis substitutes perfectly well the terahertz spectroscopy carrying valuable information about long range bonds in polymers, low energy vibrations in complex organic molecules, low frequency phonons in solids and other.
Ultra-low frequency Raman analysis (below 100cm-1) gives a lot of useful information for researchers of important modern materials, including:
Radial breathing modes of single- and multi-wall carbon nanotubes exhibit Raman spectral components that depend on the tube diameter and which can be used to determine sample quality and composition; folded acoustic modes of multilayer superlattice structures in advanced semiconductor devices show multiple strong signals below 100cm-1; heavy atom vibrations in compounds (such as halides used in incandescent lights); relaxation mode measurements of various liquids and solutions can help identify their dynamic structure; rotational mode measurements of gases can be used to determine bond lengths; and analysis of low wavenumber shear modes and lattice modes.
Warsash Scientific can be contacted for more information.