Insight into the hydration friction of lipid bilayers

Abstract

Hydration layer formed on charged sites play crucial roles in many hydration lubrication systems in aqueous media. However, the underlying molecular mechanism remains not well understood. Herein, we explored the...

Interfacial Water Is Separated from a Hydrophobic Silica Surface by a Gap of 1.2 nm

“…Figure a shows diagrammatically how the xyz displacements are performed in 3D AFM. The atomic-scale resolution features revealed by 3D AFM have been validated on a variety of crystalline surfaces immersed in aqueous solutions. − In some cases, interpretation of 3D AFM images remains challenging. − However, for pure water, low-molarity aqueous solutions, and organic liquids, the contrast observed in 3D AFM data can be explained in terms of the liquid density variations through the interface (Figure b). ,, …”

“… 33 − 36 However, for pure water, low-molarity aqueous solutions, and organic liquids, the contrast observed in 3D AFM data can be explained in terms of the liquid density variations through the interface ( Figure 1 b). 33 , 36 , 37 …”

“…33−36 However, for pure water, low-molarity aqueous solutions, and organic liquids, the contrast observed in 3D AFM data can be explained in terms of the liquid density variations through the interface (Figure 1b). 33,36,37 We apply tapping mode AFM 38 to quantify the surface roughness and uniformity of the pristine and functionalized silicon surfaces in water before 3D AFM imaging (Figure S1, Supporting Information). The root-mean square roughness of pristine, OTS, and 3-aminopropyltriethoxysilane (APTES)functionalized silica surfaces are, respectively, 0.5, 0.3, and 0.45 nm.…”