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Characterisation Of Interfacial Bonding And Photochemistry In Self-Assembled Thiol Monolayers On Gold Using Nexafs And Arups

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Listed:
  • H. RIELEY

    (Department of Chemistry, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, UK)

  • N.J. PRICE

    (Department of Chemistry, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, UK)

  • R.G. WHITE

    (Department of Physics and Surface Science Research Centre, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, UK)

  • R.I.R. BLYTH

    (Surface Science Research Centre, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, UK)

  • L. HÅKANSSON

    (Surface Science Research Centre, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, UK)

  • A.W. ROBINSON

    (Surface Science Research Centre, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, UK)

Abstract

S K-edge near-edge X-ray absorption fine structure (NEXAFS) has been used to establish the oxidation state of S in self-assembled monolayers (SAMs) of heptane and octane thiols, RSH[R=CH3(CH2)n, n=6, 7]and the analogous halo-alkane disulphides,[(XRS)2, X=Cl,Br]derivatisedex situon Au foil. We find that the initially prepared surface thiolate species(RS–)is photo-oxidised by X-radiation, in the presence of coadsorbed oxygen, to sulphonate$\left( {{\rm{RSO}}_3^ - } \right)$. Angle-resolved UV photoemission (ARUPS) has been used to further characterise the nature of the S-Au interaction in these SAMs following their preparation in UHV on Au(111). The ARUPS results suggest the involvement of the Aud-bands in the S-Au bond.

Suggested Citation

  • H. Rieley & N.J. Price & R.G. White & R.I.R. Blyth & L. Håkansson & A.W. Robinson, 1994. "Characterisation Of Interfacial Bonding And Photochemistry In Self-Assembled Thiol Monolayers On Gold Using Nexafs And Arups," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 1(04), pages 701-704.
    • Handle: RePEc:wsi:srlxxx:v:01:y:1994:i:04:n:s0218625x94000989
    DOI: 10.1142/S0218625X94000989
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