Regensburg 2007 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 20: POSTER: Biological Systems + New Materials

CPP 20.11: Poster

Wednesday, March 28, 2007, 16:00–18:30, Poster B

IR to VIS ellipsometric studies of self assembled monolayers on metal and metal oxide surfaces — P. Angelova¹, •K. Hinrichs², E. Jähne³, M. Gnauck³, K.-J. Eichhorn⁴, K. Kostova¹, and D. Tsankov^1,2 — ¹Institute of Organic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria — ²ISAS, Institute for Analytical Sciences, Department Berlin, 12489 Berlin, Germany — ³Institute of Macromolecular Chemistry, Dresden University of Technology, 01062 Dresden — ⁴Institute of Polymer Research, 01062 Dresden, Germany

Self assembled monolayers (SAM) were formed from terminally aryl-functionalized alkanethiols on Ag and Au surfaces and from long-chain alkylphosphonic acids and alkylphosphoric acid esters on aluminium oxide. The thiol compounds were synthesized from para-substituted benzyl esters of 16-mercaptohexadecanoic acid containing Cl, NO2, CN and OCH3 as substituents. The monolayers were characterized by IR and VIS ellipsometry, X-ray photoelectron spectroscopy and contact angle measurements. The different properties of the end groups affected the organizational order within the monolayer yielding different degree of orientation and tilt angles. For the bidentate or tridentate chemisorbed monolayers on the aluminum oxide surface formed from alkylphosphonic acid and alkylphosphoric acid ester a high degree of conformational order is found.