Water Structure at Solid Surfaces of Varying Hydrophobicity

2009 ◽  
Vol 113 (46) ◽  
pp. 20002-20008 ◽  
Author(s):  
Travis G. Trudeau ◽  
Kailash C. Jena ◽  
Dennis K. Hore
Keyword(s):  
Water Structure ◽  
Solid Surfaces

scholarly journals Hydrophilicity–Hydrophobicity Characteristics of Solid Surfaces and the State of Water near Surfaces of a Various Nature

2002 ◽  
Vol 20 (9) ◽  
pp. 927-935 ◽  
Author(s):  
Yu.I. Tarasevich ◽  
I.G. Polyakova ◽  
V.E. Polyakov
Keyword(s):  
Water Structure ◽  
Hydrophobic Surface ◽  
Bulk Water ◽  
The State ◽  
Solid Surfaces ◽  
Water Molecules ◽  
Saturated Vapour ◽  
Hydrophilic Surfaces ◽  
State Of Water ◽  
Contact Angle Of Wetting

Values for the surface tension, π, of 85 mJ/m2 and for the contact angle of wetting by water as its saturated vapour, θV, of 75° are proposed as criteria for distinguishing between hydrophilic and hydrophobic solid surfaces. It is shown that the water boundary layers at hydrophilic surfaces are more ordered while those at hydrophobic surfaces are less ordered relative to the situation in the bulk water structure. The localised model can be used to describe the state of motion of water molecules at a hydrophilic surface, while the motion of water molecules near a hydrophobic surface conforms to the non-localised model.

Adsorption-desorption processes on solid surfaces.

1983 ◽  
Vol 139 (4) ◽  
pp. 736
Author(s):  
V.N. Ageev ◽  
E.Ya. Zandberg ◽  
N.I. Ionov ◽  
A.Ya. Tontegode
Keyword(s):  
Solid Surfaces ◽  
Adsorption Desorption

Structural and Spectroscopic Study of Langmuir-Schäfer Films of Bis Zn-Ethane-Bridged Porphyrins Dimer

2003 ◽  
Vol 771 ◽  
Author(s):  
G. Panzera ◽  
S. Conoci ◽  
S. Coffa ◽  
B. Pignataro ◽  
S. Sortino ◽  
...  
Keyword(s):  
Surface Pressure ◽  
Scanning Force Microscopy ◽  
Structural Features ◽  
Solid Surfaces ◽  
Condensed Phases ◽  
Brewster Angle Microscopy ◽  
Force Microscopy ◽  
Vis Spectroscopy ◽  
Scanning Force ◽  
Supramolecular Aggregates

AbstractThin films (1-24 layers) of bis-zinc ethane-bridged porphyrin dimer (1) have been transferred on solid surfaces, by the Langmuir- Schäfer (LS) horizontal method. The related surface pressurearea isotherm curve shows that in dependence of the film pressure different condensed phases may occur in the monolayer. The inspection of the monolayer by Brewster Angle Microscopy (BAM) reveals the presence of peculiar networks whose structural features seemingly change upon film compression. On the other hand, the Scanning Force Microscopy (SFM) analysis performed on LS films shows fractal networks constituted by nanoscopic supramolecular aggregates, whose shape and size depend again on the LS deposition surface pressure. Finally, also UV-vis spectroscopy measurements indicates that the absorption is almost linearly related to the film thickness that is directly connected to the surface pressure.

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