Author/Authors :
Manolova، نويسنده , , M. and Ivanova، نويسنده , , V. and Kolb، نويسنده , , D.M. and Boyen، نويسنده , , H.-G. and Ziemann، نويسنده , , P. and Büttner، نويسنده , , M. and Romanyuk، نويسنده , , A. and Oelhafen، نويسنده , , P.، نويسنده ,
Abstract :
In this study we describe details of a new technique that allows to deposit metal on top of a self-assembled monolayer (SAM). Monoatomic high platinum islands were formed on a 4-mercaptopyridine SAM on Au(1 1 1) by first immersing the SAM-covered gold electrode in an aqueous solution of K2PtCl4 without potential control to allow Pt(II) ions to form a complex with the pyridine nitrogen. The complexed Pt(II) ions were then reduced electrochemically to Pt(0) after transferring the electrode to a Pt(II) ion-free solution. Upon reduction, monoatomic high Pt islands were observed in STM, the total coverage depending on the time for complexation. Ex situ angle-resolved XPS studies reveal that the Pt islands indeed reside on top of the SAM.
Keywords :
Mercaptopyridine , Gold , Platinum , XPS , Self-assembled monolayers , Metal deposition , STM , Cyclic voltammetry
