Dresden 2026 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 58: Organic molecules on inorganic substrates: Adsorption and growth III
O 58.3: Vortrag
Mittwoch, 11. März 2026, 11:00–11:15, TRE/PHYS
N-Heterocyclic Carbenes on GaAs: From Chain Formation to Ordered Monolayers — •Martin Franz1, Ankita Das2, Sandhya Chandola3, Milan Kubicki1, Mowpriya Das2, Andrea Sette4, Domenico Corona4, Maurizia Palummo4,5, Letizia Chiodo6, René Schöder1, Preeti Chahar2, Benjamin Fuhrmann1, Jonathan Engelhardt1, Oskar Düren1, Mario Dähne1, Conor Hogan4,7, Norbert Esser1,3, and Frank Glorius2 — 1Technische Universität Berlin, Institut für Physik und Astronomie, 10623 Berlin, Germany — 2Organisch-Chemisches Institut, Universität Münster, 48149 Münster, Germany — 3Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109 Berlin, Germany — 4Dipartimento di Fisica, Università di Roma "Tor Vergata", Rome 00133, Italy — 5CNR Centro S3, CNR-Istituto Nanoscienze, Modena 41125, Italy — 6Department of Engineering, Università Campus Bio-Medico, Rome 00128, Italy — 7CNR-Istituto di Struttura della Materia (CNR-ISM), Rome 00133, Italy
N-Heterocyclic carbenes (NHCs) have emerged as well-established ligands for metal surfaces. First studies on silicon exist as well, while III-V compound semiconductors are the materials of choice for opto-electronic devices. Here, the adsorption behavior of NHCs on GaAs is studied in detail [1]. A covalent binding to the surface and a formation of well-ordered monolayers is found, accompanied by exceptionally large work function reductions. The monolayers consist of NHC chains being the result of an attractive interaction between the molecules.
[1] M. Franz et al., Angew. Chem. Int. Ed., 64, e202511094 (2025).
Keywords: N-heterocyclic carbenes; Monolayers; Surface functionalization