COMTRANS · Combined resonance Raman and transport studies of functionalized carbon nanotubes
FP6 — Marie Curie Actions (Human Resources and Mobility)
- Duration
- 2006-07-01 → 2008-06-30
- EU contribution
- €156,496
- Participants
- 1
- Scheme
- EIF
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Results in brief
Final Activity Report Summary - COMTRANS (Combined resonance Raman and transport studies of functionalised carbon nanotubes)
A single wall carbon nanotube (SWNT) is a cylinder-like molecule with a diameter of about 1nm and a length of up to several millimetres. Their physical properties can be derived from graphene, a two-dimensional planar sheet of carbon atoms arranged in a honeycomb lattice. Carbon nanotubes are expected to be the constituents for the smallest possible electronic devices because they are mechanically very stable and their electronic properties can be metallic and semiconducting, depending on their diameter. The quantum nature of these nanometre thin molecular wires is at the heart of understanding the electronic transport and optical properties of these materials. Spectroscopic characterisation, such as those performed in the course of this Marie Curie Fellowship therefore is an indespensable tool for determination of the SWNT diameter and electronic properties for further technological application of the SWNT such as the gate in a field effect transistor or as an optically active element. Our research proposal was focussed on the combined characterisation of SWNTs and the parent compound, graphene, by optical spectroscopy, electron microscopy and transport measurements. Furthermore electron energy loss spectroscopy and photoemission spectroscopy were used to characterise the properties of SWNTs and graphene sheets. In the course of our research work, we explored synthesis, the photophysics and many body effects of SWNTs and graphene sheets. Eventually, such a research paves the way to devices, on which both, the morphology and the electronic properties can be probed on the same SWNT or graphene layer. The obtained results were of prime importance not only for basic and fundamental properties such as electron-phonon coupling and superconductivity in carbon systems but also for applications. For example, in the course of this proposal, we have developed a low cost and facile synthesis route for large area and highly crystalline graphene layers that can be transferred to arbitrary substrates.
Data: CORDIS, © European Union
Project objective
Impending nanotechnological revolutions will create a variety of novel approaches to addressing scientific and technological challenges in our society. The research and application of nanosized materials will be a major scientific and technological goal of the 21st century.Single wall carbon nanotubes (SWNTs) represent the one-dimensional form of carbon and can be imagined as a rolled up sheet of graphene with a diameter in the nanometre range and a length of up to several hundred microns. All physical pro perties of a SWNT are determined by the diameter and the angle of rolling up relative to the graphene lattice, also known as the chiral angle. Resonance Raman spectroscopy on SWNTs has recently reached a level of understanding, where the diameter and chirality can be determined by the position and the intensity of the radial breathing mode of the SWNT.In this project we propose the combined measurement of resonance Raman spectra and electronic transport properties on the same functionalised nanotube device with the goal to investigate the role of chirality and functionalisation in electronic transport. The Raman and transport measurements will be carried out in field effect transistor geometry in order to tune the Fermi level as a function of gate voltage. T he electronic transport will also be studied as a function of external fields (e.g. photoconductivity).
Original text from CORDIS.
Participants
- LEIBNIZ INSTITUTE FOR SOLID STATE AND MATERIALS RESEARCH DRESDEN · DRESDENCoordinatorCity levelGermany
Links
Data: CORDIS, © European Union