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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

» presentations   » 2016.03.07

Growing mechanism and tip-induced switching of acetylbiphenyl on Si(100)-(2x1):H

Frank Eisenhut, Justus Krüger, Anja Nickel, Xavier Bouju, Gianaurelio Cuniberti, and Francesca Moresco

DPG Frühjahrstagung der Sektion Kondensierte Materie (SKM)

2016.03.07; Regensburg, Germany

The investigation of molecules on semiconducting surfaces has caused much effort and can push forward molecular electronic devices. In this context one approach is to exploit the structure and related properties of the molecules and to use them as electronic components. In this study one candidate for a molecular latch, acetylbiphenyl (ABP), was investigated by means of low-temperature scanning tunneling microscopy on the passivated silicon surface. Firstly here we report on the growing mechanisms of ABP on Si(100)-(2x1):H. The molecule is fulfilling a dangling bond initiated growing mechanism along as well as perpendicular to the silicon dimer rows and consequently it is forming a 1-dimensional molecular assembly. Despite the growing of the molecule we found a reversible tip-induced conformational change of a molecule at the end of the grown molecular chain. This molecular change can be possibly used as a switch on this surface.

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