Manfred Kappes

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The interaction of methyl radicals with hot HOPG (highly oriented pyrolytic graphite) surfaces under single-collision conditions has been studied by scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS). Methyl radicals were generated by thermal decomposition of azomethane N 2 (CH 3) 2. Significant carbon deposition under elevated(More)
We demonstrate an organic semiconductor distributed feedback (DFB) laser as excitation source in surface-enhanced Raman spectroscopy (SERS). SERS-active substrates comprising nanopillar arrays were fabricated by the technique of laser-assisted nano-replication.
Debris flows are among the most dangerous processes in mountainous areas due to their rapid rate of movement and long runout zone. Sudden and rather unexpected impacts produce not only damages to buildings and infrastructure but also threaten human lives. Medium-to regional-scale susceptibility analyses allow the identification of the most endangered areas(More)
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