Regensburg 2013 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 70: Poster Session: Devices; Preparation and characterization; C/diamond; Si/Ge
HL 70.18: Poster
Mittwoch, 13. März 2013, 16:00–20:00, Poster A
Ab-initio study of metal-decorated carbon nanotubes for interconnect and sensor applications — •Florian Fuchs1, Christian Wagner1, and Jörg Schuster2 — 1Center for Microtechnologies, Chemnitz University of Technology, Chemnitz, Germany — 2Fraunhofer Institute for Electronic Nano Systems (ENAS), Chemnitz, Germany
Carbon nanotubes (CNTs) are promising candidates for novel applications in various technical fields. They are discussed as metallization layers in interconnect systems, thanks to their extraordinary electronical properties. Furthermore, the electromechanical sensitivity of CNTs can be used to construct new sensors. For all these various application fields, CNTs with suitable properties are required. Still, producing them in high purity is a challange and multiple approaches are being considered. One of the possibilities is to functionalize the CNTs in order to adjust their electronical properties.
We present the results of an ab-initio study of metal-decorated single walled CNTs (SWCNTs) based on density functional theory. The influence of different metals adsorbed on a semiconducting SWCNT are investigated and compared. We demonstrate that the decoration significantly changes the properties and that the choice of the metal is essential. Furthermore, the decorated SWCNTs are strained to judge their applicability for sensors. It is shown, that the electromechanical properties of SWCNTs are conserved and that the metal decoration can therefore be used to control the properties of SWCNTs for future sensors as well as for interconnect applications.