Regensburg 2013 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 70: Poster Session: Devices; Preparation and characterization; C/diamond; Si/Ge
HL 70.16: Poster
Mittwoch, 13. März 2013, 16:00–20:00, Poster A
Temperature and gate dependent electrical characterization of carbon nanotube networks — •Fabian Fritz1,2, Michael Schnee1,2, Marlou Slot1,2, Robert Frielinghaus1,2, Claus M. Schneider1,2, and Carola Meyer1,2 — 1Peter Grünberg Institut (PGI-6), Forschungszentrum Jülich, 52425 Jülich, Germany — 2JARA – Fundamentals of Future Information Technologies
Carbon nanotubes (CNTs) show outstanding electronic properties and therefore they are a promising material for future nanoelectronic applications. Their electrical transport behavior depends on the environment. Here, we investigate the influence of gate dielectrics and chemical functionalization on the transport properties of carbon nanotube networks.
Networks of single-walled CNTs of different densities are grown by means of chemical vapor deposition. The structure of the networks is characterized by atomic force microscopy and scanning electron microscopy. Electrical measurements have been conducted at room temperature and down to 4 K in a helium flow cryostat.
At low temperature, the networks show clear non-ohmic current-voltage characteristics, which is interpreted within the framework of two-dimensional variable range hopping. The influence of oxidation on the transport through the networks is investigated, since this is the first step for a chemical functionalization based on ligand exchange reaction. First results of magneto-transport measurements on chemically functionalized CNTs as well as gate dependent transport measurements are presented.