DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2007 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

O: Fachverband Oberflächenphysik

O 17: Poster Session I (Nanostructures at Surfaces; Metal Substrates: Epitaxy and Growth; Methods: Scanning Probe Techniques; Phase Transitions)

O 17.17: Poster

Monday, March 26, 2007, 17:30–20:30, Poster C

Spatially resolved eletronic and vibronic characteristics of a single higher diamondoid moleculeYayu Wang1, •Daniel Wegner1, Xinghua Lu1, Ryan Yamachika1, Andre Wachowiak1, Emmanouil Kioupakis1, Steven Louie1, Mike Crommie1, Jeremy Dahl2, Shenggao Liu2, and Robert Carlson21Department of Physics, University of California at Berkeley, and Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA. — 2MolecularDiamond Technologies, Chevron Technology Ventures, Richmond, CA, USA

Diamondoids are hydrocarbon molecules with diamond-like cage structures. Their structural complexity and chemical bond tunability make them ideal building blocks for creating novel nanostructures. We have investigated the recently discovered higher diamandoids at the single-molecule level using cryogenic scanning tunneling microscopy (STM) and spectroscopy (STS). STM images of individual 121-tetramantane molecules display pronounced nodal features across the molecular surface. Despite a large energy gap auround the Fermi level, STS and IETS reveal strong interactions between tunneling electrons and the diamondoid C-H stretch mode. The strength of the vibronic coupling has a distinct spatial distribution and peaks strongly at the topographic line nodes. Density-functional theory calculations have been used to reproduce the basic electronic structure and the peculiar geometric features of the higher diamondoids.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2007 > Regensburg