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

Figure 2

Neutron Brillouin spectrum of protein hydration water, for a protein hydrated at 68%, at different 𝑄 values: (a) 0.4 A⁻¹, (b) 0.6 A⁻¹, and (c) 0.8 A⁻¹. The data (dots) are compared with the best-fit function (red full line). The components describing the high- (green line) and low-frequency (blue line) DHO are also shown. The adopted resolution is represented by the dashed line (figure extracted from [1]).