Phase transition in ordered porphyrin layers on iodide modified Cu(1 1 1): An EC-STM study

The self-assembly of meso-tetra ( N-methyl-4-pyridyl) porphyrine tetratosylat (H 2TMPyP) on an iodide modified Cu(1 1 1) surface has been studied by means of in situ electrochemical-scanning tunneling microscopy (EC-STM). The I/Cu(1 1 1) surface was found to be a good substrate for the self-assembly...

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Veröffentlicht in:	Surface science 2007-07, Vol.601 (13), p.2597-2602
Hauptverfasser:	Hai, N.T.M., Gasparovic, B., Wandelt, K., Broekmann, P.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Copper Cross-disciplinary physics: materials science rheology Exact sciences and technology Physics Porphyrins Scanning tunneling microscopy Self-assembly Solid–liquid interface
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Zusammenfassung:	The self-assembly of meso-tetra ( N-methyl-4-pyridyl) porphyrine tetratosylat (H 2TMPyP) on an iodide modified Cu(1 1 1) surface has been studied by means of in situ electrochemical-scanning tunneling microscopy (EC-STM). The I/Cu(1 1 1) surface was found to be a good substrate for the self-assembly of highly ordered layers of porphyrin cations. Furthermore, a reversible structural phase transition within the highly ordered porphyrin layer was observed during variation of the electrode potential, as a consequence of changing electronic properties of the substrate.
ISSN:	0039-6028 1879-2758
DOI:	10.1016/j.susc.2007.05.035