All research themes

Research

Nanocarbon assembly and spectroscopy

Placing and probing individual graphene flakes and carbon nanotubes, from dielectrophoretic device assembly and voltage-contrast electron microscopy to nanoscale infrared and plasmon-enhanced Raman spectroscopy.

Atomic force microscope and infrared maps of a single reduced graphene oxide flake functionalised with sulfonated pyrenes, and line profiles comparing flake height with infrared absorption across its edge.
AFM-coupled infrared mapping of sulfonate groups on a functionalised monolayer of reduced graphene oxide (left), with height and infrared profiles along the marked lines (right). Reproduced from C. Bartlam, S. Morsch, K. W. J. Heard, P. Quayle, S. G. Yeates and A. Vijayaraghavan, Carbon (2018), Fig. 6, doi:10.1016/j.carbon.2018.06.061, under CC BY 4.0; panels rearranged.

Much of the group’s foundational work concerns individual nanocarbons. AFM-coupled infrared spectroscopy identified and mapped sulfonate groups on a 1.7 nm functionalised monolayer of reduced graphene oxide with 32 nm resolution; the group runs a nanoscale infrared facility for this kind of measurement.

Earlier work assembled carbon-nanotube and graphene device arrays by dielectrophoresis, imaged their electronic structure by voltage-contrast scanning electron microscopy, and, with collaborators, used plasmon-enhanced Raman scattering to probe strain, doping and molecules inside nanotubes.

This theme contributes to the goals above. More on the goals at the United Nations Sustainable Development Goals site. The content of this publication has not been approved by the United Nations and does not reflect the views of the United Nations or its officials or Member States.

Publications 38

  22. Aravind Vijayaraghavan, Frank Hennrich, Ninette Stürzl, Michael Engel, Marc Ganzhorn, Matti Oron-Carl, Christoph W. Marquardt, Simone Dehm, Sergei Lebedkin, Manfred M. Kappes, Ralph Krupke

    Toward Single-Chirality Carbon Nanotube Device Arrays

    ACS Nano 4(5), 2748-2754 2010 77 citations

  34. Aravind Vijayaraghavan

    Effect of static and dynamic charges on the electronic transport properties of single wall carbon nanotube transistors and interconnects

    PhD thesis, Rensselaer Polytechnic Institute 2005 Thesis