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

Figure 5

Left panel: experimental dispersion curves of THz collective modes of E. coli intracellular water. Circles refer to high-frequency mode and lozenges to the low-frequency mode. The dashed line is a guide to the eye to follow the low-frequency low-𝑄 dependence. Dispersion curves of bulk water (blue lines) are reported for comparison. Right panel: damping factor of the cellular water (circles) compared to the one of neat water (blue line) and hydration water (Figure extracted from [38]).