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Analysis of Molecules Confined by Graphenes


24.08.2011
| Ref.Nr. 11001
Physics&Engineering

Background
The analysis of single molecules or thin layers is of technological and scientific importance. Unfortunately the common methods are not able to detect substances with extremely small quantities. Another problem is the instability of thin molecule layers and especially single molecules with respect to their thermal-, chemical- and photo-degradation or to external mechanical fields caused in scanning probe techniques. A disadvantage of Raman scattering methods is the large amount of heat produced by the focused plasmons localized at the active site, which can cause damage of the molecules.

Technology
This novel method allows the analysis of substances in very small quantities, even single molecules, with common techniques. Therefore the substances to be analyzed are covered with a graphene layer.
Graphene is a monoatomically thick and flexible layer, which provides thermal and electrical conductivity as well as high optical transparency and impermeability to gases and liquids. Thus graphene can act as protective layer against local heating. Graphene exhibits plasmon resonance in the ultraviolet and blue spectral region and thus can enhance Raman signals.

IP Rights
US Patent Application March 2011

Patent Owner
Humboldt-Universität zu Berlin, Germany
PlasmaChem GmbH, Germany
Application Area:
Chemical analysis, Bioanalysis
Development Stage: Demonstration
Bild des Benutzers Dr. Kirk Haselton
Licensing Manager: Dr. Kirk Haselton
T +49 30 2125 4842
F +49 30 2125 4822
Suitable Industry: Analytical Industry, Chemical Industry
Benefits:
  • precise profiling with protective graphene layer
  • profiling analysis of:    
    single molecules
    soft and instable molecules
    thin layers and self-assembled monolayers (SAMS)
  • analysis methods:
    scanning probe techniques (e. g. STM, AFM even in contact mode)
    Raman Spectroscopy (e. g. SERS, TERS)
    Infrared Spectroscopy