Brillouin Neutron Spectroscopy as a Probe to Investigate Collective Density Fluctuations in Biomolecules Hydration Water

Figure 6

Lower panel: dispersion curves of collective modes of NAGMA and NALMA hydration water. Full squares refer to hydrophilic NAGMA hydration water and empty circles to hydrophobic NALMA hydration water. The green and blue lines correspond to the best fits to infer the propagation speed. The stars report the nondispersive low-frequency mode, which has been probed to be the same for both samples. Upper panel: damping factor for the hydrophilic (full squares) and hydrophobic peptide (empty circles).