Herstellung organischer dünnstschichten

Abstract

In this paper we present different experiments describing the fabrication and characterisation of self-assembled monolayers of organothiols and also discuss some of the most important applications of these systems. The reader may practise the fabrication and characterisation of self-assembled monolayers with different endgroups by adsorption of CH3- and OH-terminated alkanethiols on copper-coins (1 or 2 Pfennigcoins). Then patterned self-assembled monolayers of CH3- and OH-terminated alkanethiols are produced by applying the microcontact printing technique. When these gratings are wet with water - e. g. by breathing onto the surfaces - the water adsorbs onto the hydrophilic OH-terminated areas but not on the hydrophobic CH3-terminated regions. Illumination with a laser then produces bright diffraction spots which disappear when the water evaporates. Finally, we briefly discuss applications of the self-assembled ultrathin films as sensor-devices and as substrates for CVD (chemical vapour deposition).