Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 54: Nanostructures at surfaces II

O 54.2: Vortrag

Mittwoch, 28. März 2012, 17:00–17:15, MA 042

Evaluation of the Growth Mechanism of Ag-TCNQ for Morphology Control — •Benedikt Rösner, Andreas Späth, Stephan Wenzel, and Rainer H. Fink — Department Chemistry and Pharmacy, University Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen

Silver-(7,7*,8,8*)-tetracyanoquinodimethane (Ag-TCNQ) represents a form of charge transfer salts which can be described as needle-shaped crystals. This material features interesting properties regarding optical, electrical and magnetic behaviour and is therefore an interesting candidate for use in field emission devices, opto-electric storage devices and boards based on organic components. The control of the morphology, which is strongly dependent on the growth mechanism, is an essential precondition for the production of nanostructured devices. Two bottom-up growth mechanisms have been described so far. [1,2] However, these mechanism lag to describe phenomena observed by various microscopic methods growing this material in different reaction environments. We therefore evolve a diffusion-controlled reaction mechanism based on the first approaches mentioned above and discuss the influence of different parameters on the behaviour of silver and TCNQ on the molecular scale. 1.*Cao, G.-Y., et al., Micron, 2005. 36: p. 285-290. 2.*Ye, C.-N., et al., Chin. Phys. Lett., 2004. 21: p. 1787-1790.