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Substrate and solution effects on the long-range "hydrophobic" interactions between hydrophobised gold surfaces
YKI – Ytkemiska institutet.
2000 (Engelska)Ingår i: Journal of Physical Chemistry B, ISSN 1520-6106, E-ISSN 1520-5207, Vol. 104, s. 9704-9712Artikel i tidskrift (Refereegranskat)
Abstract [en]

Hydrophobic surfaces prepared by adsorption of hexadecanethiol, 1,10-dithiodecane, octadecanoic acid, and hexadecanol onto gold have been used to study long-ranged "hydrophobic" interactions, and direct force measurements were performed in water, aqueous NaCl electrolytes, and water/ethanol mixtures, using a bimorph surface force instrument. Results confirm that for very stable hydrophobic surfaces the contact angle is sufficient to predict the presence of an attraction in excess of van der Waals forces, in which case the attraction is caused by the coalesence of microscopic bubbles on the surfaces. For the less stable hydrophobic films, the properties of the adsorbed layer is important for the qualitative nature of the interaction. For such surfaces different -- and as yet unknown -- mecanisms cause the attraction

Ort, förlag, år, upplaga, sidor
2000. Vol. 104, s. 9704-9712
Nationell ämneskategori
Naturvetenskap
Identifikatorer
URN: urn:nbn:se:ri:diva-26942OAI: oai:DiVA.org:ri-26942DiVA, id: diva2:1053945
Anmärkning
A1375Tillgänglig från: 2016-12-08 Skapad: 2016-12-08 Senast uppdaterad: 2017-11-29Bibliografiskt granskad

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