Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • 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
Preferential Adsorption of Amino-Terminated Silane in a Binary Mixed Self-Assembled Monolayer
KTH, Skolan för kemivetenskap (CHE), Kemi, Ytkemi.
Visa övriga samt affilieringar
2011 (Engelska)Ingår i: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 27, nr 9, s. 5420-5426Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The composition and structure of a binary mixed self-assembled monolayer (SAM) of 3-aminopropyltiethoxysilane (APS, NH2(CH2)(3)Si-(OCH2CH3)(3)) and octadecyltrimethoxysilane (ODS, CH3(CH2)(17)Si(OCH3)(3)) on a silicon oxide surface have been characterized by water contact-angle measurements, X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and sum frequency generation (SFG) vibrational spectroscopy. XPS demonstrated that APS in the mixed SAM is significantly enriched in comparison to that in solution, indicating the preferential adsorption of APS during the SAM formation. AFM observations showed that the mixed SAM becomes rougher. SFG revealed that the coadsorption of APS induced a conformation disordering in the ODS molecules present in the mixed SAM. The surface enrichment of APS has been explained in terms of differences in the surface adsorption rates of the two components as well as in the self-congregation states of APS molecules in the bulk solution. Furthermore, the structure of the water molecules on the mixed SAM surface in contact with the aqueous solutions at different pH's has also been studied. The results indicate that the mixed-SAM modified surface is positively charged at pH < 5 and negatively charged at pH > 7.

Ort, förlag, år, upplaga, sidor
2011. Vol. 27, nr 9, s. 5420-5426
Nationell ämneskategori
Kemi Fysikalisk kemi Materialteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-33461DOI: 10.1021/la200497uISI: 000289742500032Scopus ID: 2-s2.0-79955365667OAI: oai:DiVA.org:kth-33461DiVA, id: diva2:418554
Anmärkning
QC 20110523Tillgänglig från: 2011-05-23 Skapad: 2011-05-09 Senast uppdaterad: 2017-12-11Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextScopus

Sök vidare i DiVA

Av författaren/redaktören
Tyrode, Eric
Av organisationen
Ytkemi
I samma tidskrift
Langmuir
KemiFysikalisk kemiMaterialteknik

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 52 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • 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