Adsorption behaviour of C2H5SCH3 on Ag(111) and Ag(UFP) surfaces

Sardar, S. A.; Syed, J.A.; Yagi, Shunsuke; Tanaka, Kenichiro

doi:10.1002/sia.1628

Cited by 1 publication

(1 citation statement)

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“…Since most adsorption studies are carried out under ultrahigh vacuum (UHV) conditions, usually metals are used as substrates. It is by now well established that molecules having thiol (−SH) as endgroups can show strong bonds to surfaces because of the special affinity between sulfur and certain metals, e.g., Au surfaces, Cu surfaces, and Ag surfaces . Furthermore, theoretical studies have shown a strong affinity between transition metals and sulfur .…”

Section: Introductionmentioning

confidence: 99%

Molecular Wires Self-Assembled on a Graphite Surface

Riemann

Nelson

2009

Langmuir

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We report a scanning tunneling microscopy study of the amino acid l-methionine on highly ordered pyrolytic graphite deposited under ambient conditions. Our experiments demonstrate the ability of l-methionine to form highly regular structures on the surface of the graphite template. By means of self-assembly, the amino acid arranges itself into an array of molecular wires, i.e., well-ordered stripes of uniform width and separation. The spacing of these wires can be controlled with the deposition amount of the amino acid, whereas the width stays constant. The width of the wires is determined by two methionine molecules arranged with their carboxyl group facing each other. The regular separation of individual wires suggest a long-range interaction among them. Molecular mechanics calculations are used to compare the experimental results with a basic model for the methionine configuration on the surface. A model for the adsorption geometry of methionine on graphite is presented.

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Section: Introductionmentioning

confidence: 99%