However, interfacial water exists on different length scales, from sub-nanometer to micron sized (corrugations, organelles, membranes, liposomes), and is often buried inside another solid or liquid environment that is not at all comparable to vacuum or air. It can also be subject to conditions of flow or electrostatic fields. The absence of molecular knowledge of realistic interfaces is due to a lack of tools that can access buried nano- or microscopic interfaces in liquids and solids.
Research in the Roke lab is aimed to develop non-invasive label-free (nonlinear) optical tools that can probe aqueous systems and interfaces on different length scales, and to use these tools to understand the molecular level properties of water in diverse systems such as in solutions, at buried interfaces, in and outside droplets, curved nanoscale membranes, and in living systems.
A. Marchioro; M. Bischoff; C. Lütgebaucks; D. Biriukov; M. Předota et al. : Surface Characterization of Colloidal Silica Nanoparticles by Second Harmonic Scattering: Quantifying the Surface Potential and Interfacial Water Order; The Journal of Physical Chemistry. 2019-07-26. DOI : 10.1021/acs.jpcc.9b05482.