Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Globotriose- and oligo(ethylene glycol)-terminated self-assembled monolayers: Surface forces, wetting, and surfactant adsorption
KTH, Skolan för kemivetenskap (CHE), Kemi, Ytkemi (stängd 20081231).ORCID-id: 0000-0001-7496-1101
KTH, Skolan för kemivetenskap (CHE), Kemi, Ytkemi (stängd 20081231).
Department of Physics, Chemistry and Biology, Linköping University.
Department of Physics, Chemistry and Biology, Linköping University.
2006 (Engelska)Ingår i: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 22, nr 24, s. 10038-10046Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A set of oligo( ethylene glycol)-terminated and globotriose-terminated self-assembled monolayers (SAMs) has been prepared on gold substrates. Such model surfaces are well defined and have good stability due to the strong binding of thiols and disulfides to the gold substrate. They are thus very suitable for addressing questions related to effects of surface composition on wetting properties, surface interactions, and surfactant adsorption. These issues are addressed in this report. Accurate wetting tension measurements have been performed as a function of temperature using the Wilhelmy plate technique. The results show that the nonpolar character of oligo( ethylene glycol)-terminated SAMs increases slightly but significantly with temperature in the range 20-55 degrees C. On the other hand, globotriose-terminated SAMs are fully wetted by water at room temperature. Surface forces measurements have been performed and demonstrated that the interactions between oligo( ethylene glycol)-terminated SAMs are purely repulsive and similar to those determined between adsorbed surfactant layers with the same terminal headgroup. On the other hand, the interactions between globotriose-terminated SAMs include a short-range attractive force component that is strongly affected by the packing density in the layer. In some cases it is found that the attractive force component increases with contact time. Both these observations are rationalized by an orientation- and conformation-dependent interaction between globotriose headgroups, and it is suggested that hydrogen-bond formation, directly or via bridging water molecules, is the molecular origin of these effects.

Ort, förlag, år, upplaga, sidor
2006. Vol. 22, nr 24, s. 10038-10046
Nyckelord [en]
Oligo(ethylene glycol), Packing density, Tension measurements, Wilhelmy plate technique
Nationell ämneskategori
Kemi Fysikalisk kemi
Identifikatorer
URN: urn:nbn:se:kth:diva-24558DOI: 10.1021/la061857yISI: 000242022100035Scopus ID: 2-s2.0-33846184082OAI: oai:DiVA.org:kth-24558DiVA, id: diva2:351782
Anmärkning

QC 20150721

Tillgänglig från: 2010-09-16 Skapad: 2010-09-16 Senast uppdaterad: 2017-12-12Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextScopus

Personposter BETA

Blomberg, Eva

Sök vidare i DiVA

Av författaren/redaktören
Blomberg, EvaClaesson, Per Martin
Av organisationen
Ytkemi (stängd 20081231)
I samma tidskrift
Langmuir
KemiFysikalisk kemi

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 282 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf