Jpn. J. Appl. Phys. 45 (2006) pp. 1953-1955 |Previous Article| |Next Article| |Table of Contents|
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Scanning Tunneling Microscopy and Spectroscopy Studies of Porphyrins at Solid–Liquid Interfaces
Bas Hulsken,
Richard van Hameren,
Pall Thordarson1,
Jan W. Gerritsen,
Roeland J. M. Nolte,
Alan E. Rowan,
Maxwell J. Crossley1,
Johannes A. A. W. Elemans and
Sylvia Speller
Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands
1School of Chemistry, The University of Sydney, NSW 2006, Australia
(Received July 4, 2005; accepted August 19, 2005; published online March 27, 2006)
Monolayers of two tetrakis(meso-undecyl)porphyrins adsorbed at the interface of a liquid and highly oriented pyrolytic graphite (HOPG) and Au(111) surfaces have been investigated with scanning tunneling microscopy (STM). Both molecules form stable monolayers on these surfaces, and topographic images have been obtained down to the submolecular level. For the first time, scanning tunneling spectroscopy (STS) has been used to reveal the electronic properties of this type of molecules at a solid–liquid interface.
KEYWORDS:
solid–liquid interfaces, scanning tunneling microscopy, scanning tunneling spectroscopy, surface electronic phenomena, interface states, gold, alkanes, porphyrins, chromophores
URL:
http://jjap.ipap.jp/link?JJAP/45/1953/
DOI: 10.1143/JJAP.45.1953
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