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

Figure 3

Left panels: dispersion curves of the high-frequency (full diamonds) and low-frequency (empty diamonds) model in RNase hydration water. The red lines represent the linear fit yielding a propagation speed of about 3400 m/s, and the blue lines report the corresponding curves in pure bulk water. Right panels: damping factors of the high- (full triangle) and low- (empty triangle) frequency mode. The red lines describe the 𝑄-dependence of the damping factor as compared to the blue lines representing the bulk water behaviour (Figure extracted from [1]).