Berlin 2012 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 93: Poster Session: Metal-Semiconductor Hybrid Systems, Plasmonic Systems / Photonic Crystals / Carbon: Diamond & CNT / Quantum Information Systems
HL 93.20: Poster
Thursday, March 29, 2012, 16:00–19:00, Poster D
Functionalization of carbon nanotubes with Mn4-clusters — •Anna-Katharina Saelhoff1, Robert Frielinghaus1, Claire Besson1, Henrik Flötotto1, Lothar Houben1,2, Paul Kögeler1, Claus M. Schneider1, and Carola Meier1 — 1Peter Grünberg Institut, Forschungszentrum Jülich and JARA Jülich Aachen Research Alliance, 52425 Jülich, Germany — 2Ernst Ruska-Center for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich, 52425 Jülich, Germany
Due to their exceptional mechanical and transport properties, carbon nanotubes (CNTs) are a promising material for various applications in nanoelectronics. Their properties can be modified by different chemical functionalizations.
Here, we present covalent functionalization of CNTs with magnetic Mn4-clusters. The route for this functionalization is very general, based on ligand exchange and can be applied for different types of molecules. The yield of the functionalization depends on the number of carboxylic groups on the CNTs created by oxidation. This process is monitored using Raman spectroscopy. However, the specific atomic structure can only be investigated by transmission electron microscopy (TEM).
Thus, for comprehensive characterization, CNTs are grown on patterned Si3N4 membranes by chemical vapor deposition. These suspended CNTs are contacted using e-beam lithography. The transport behaviour of such a device is then correlated to the information obtained by TEM and Raman spectroscopy.