How Water Meets a Very Hydrophobic Surface
نویسندگان
چکیده
منابع مشابه
How water meets a very hydrophobic surface.
Is there a low-density region ("gap") between water and a hydrophobic surface? Previous x-ray and neutron reflectivity results have been inconsistent because the effect (if any) is subresolution for the surfaces studied. We have used x-ray reflectivity to probe the interface between water and more hydrophobic smooth surfaces. The depleted region width increases with contact angle and becomes la...
متن کاملHow water meets a hydrophobic surface.
Synchrotron x-ray reflectivity measurements of the interface between water and methyl-terminated octadecylsilane monolayers with stable contact angle >100 degrees conclusively show a depletion layer, whether or not the water is degassed. The thickness is of order one water molecule: 2-4 Angstrom with electron density <40% that of bulk water. Considerations of coherent and incoherent averaging o...
متن کاملComment on ‘‘How Water Meets a Hydrophobic Surface’’ The prediction of a low-density depletion layer at the boundary between water and a hydrophobic surface has attracted significant theoretical and experimental attention
The prediction of a low-density depletion layer at the boundary between water and a hydrophobic surface has attracted significant theoretical and experimental attention [1–5]. Recently, Poynor et al. [4] have carried out a ‘‘tour de force’’ x-ray reflectivity experiment which allowed them to deduce an electron density depletion at the interface of water in contact with the hydrophobic methylter...
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A microfluidic-based approach for the fabrication of organic contaminants absorbing core-shell particles is demonstrated. The hydrophobic porous core absorbs oil while the hydrophilic surface enables the particles to be well-dispersed in aqueous solutions. These particles can uptake oil from aqueous solution saturated with oil or via direct contact with oil blobs as depicted in the figure.
متن کاملHow hydrophobic is alanine?
By a number of measures, alanine is poised at the threshold between those amino acids that promote the membrane integration of transmembrane alpha-helices and those that do not. We have measured the preference of alanine to partition into the lipid-water interface region over the central acyl chain region of the endoplasmic reticulum (ER) membrane both by its ability to promote the formation of...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2010
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.105.037803