Herstellung organischer Dünnstschichten

  • chair:

    Himmel, H. / Wöll, C. (1998)

  • place:

    Chemie in unserer Zeit 32 (1998),  6, 294–301

  • Date: 1998
  • Himmel, H. / Wöll, C. (1998): „Herstellung organischer Dünnstschichten“. In: Chemie in unserer Zeit 32 (1998),  6, 294–301

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 Pfenningcoins). 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 into 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).


 

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