Hamburg 2001 – wissenschaftliches Programm
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O: Oberflächenphysik
O 25: Postersitzung (Grenzfl
äche fest-flüssig, Methodisches, Nanostrukturen, Organische Dünnschichten, Rastersondentechniken, reine Oberfl
ächen, Teilchen und Cluster, Zeitaufgelöste Spektroskopie, Sonstiges)
O 25.20: Poster
Mittwoch, 28. März 2001, 15:00–18:00, Foyer zu B
Carbon nanotubes: preparation and characterisation — •Alexandre Kalabouchkine1, Jan Sandler2, Jonathan Coleman3, Wolfgang Bauhofer1, Karl Schulte1, and Werner Blau3 — 1TU Hamburg-Harburg, Germany — 2University of Cambridge, UK — 3Trinity College, Dublin, Republic of Ireland
We have investigated problems of carbon nanotube (CNT) preparation, characterisation and purification. For CNT preparation we have used the carbon arc discharge method which leads to CNT containing deposits. We found that our deposits are very similar to deposits already described in the literature. They show a similar structure, mechanical properties, and contain CNT in the core part. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis of our deposits allows us to conclude that we usually have multi-wall carbon nanotubes (MWCNT) with a diameter of about 20-50 nm and more than 2 µm in length. The diameter of each MWCNT is usually constant and the MWCNT are rather straight. The volume fraction of MWCNT in the core part of the deposit is about 50%. According to electron paramagnetic resonance (EPR) tests the MWCNT content in the soot is about 30-35% by mass. Laser Raman spectroscopy tests have revealed that the produced MWCNT have a high quality and high compressional mechanical properties and a regular structure. Comparing our Raman spectra to the literature we conclude, that our MWCNT show rather few structural defects which will be verified by high-resolution TEM analysis. This work is a collaboration between TUHH, Trinity College and Cambridge.