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Lecture Alexandr Marchenko

Roster

WhenWhere
11 March 2005 FWN-Building 5111.0080, Nijenborgh 4, 9747 AG, Groningen
Speaker: Alexandr Marchenko
Affiliation: L.R.C. Semiconducteurs organiques, DSM/DRECAM/SPCSI, CEA-Saclay, 91191 Gif-sur-Yvette, France
Title: Scanning tunneling microscopy of organic molecules in liquid-solid interface
Date: Fri Mar 11, 2005
Start: 14.00
Location: FWN-Building 5111.0080
Host: I. Arfaoui / P. Rudolf
Telephone: +31 50 363 4705 / 4736

Abstract

Self-assembled monolayers (SAMs) of organic molecules on atomically flat surfaces have attracted great interest over the last decade in view of both the theoretical aspects and the potential applications. Since the discovery of scanning tunneling microscopy (STM) this method has been a unique tool for the investigations of such systems with molecule resolution in ultra-high vacuum. An alternative to vacuum deposition in the preparation of well-defined molecular architectures is based on self-assembly of molecules at the liquid-solid interface under ambient conditions. In this talk we present the systematic comparative STM study of different nanostructured molecular self-assemblies at the liquid/Au(111) and liquid/graphite interface. We show that Au(111) and graphite surfaces modified by organic template can serve as new subtrates for formation of new organic SAMs.

Investigated molecules: long n-alkanes, CnH2n+2 (n = 10 - 50) discotic liquid crystals (triphenylenes, hexabenzocoronenes, triazaternaphtylenes); trimethylsilyl-acetylene derivatives (as alternative to thiole SAMs); fullerenes, C60 and C70. The results of observation of phase transitions, single-molecule and single-nanocluster manipulations will be presented. The observed structures are discussed in terms of commensurability and interfacial interactions.

Last modified:22 October 2012 2.30 p.m.