Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 64: Poster Session: Transport

TT 64.10: Poster

Donnerstag, 4. April 2019, 15:00–18:30, Poster D

Zero-dimensional contacts to carbon nanotubes encapsulated by hexagonal boron nitride — Christian Bäuml, •Michaela Eichinger, Nicola Paradiso, and Christoph Strunk — University of Regensburg, Regensburg, Germany

Edge contacts to carbon nanotubes (CNTs) have a contact interface of only a handful of atoms. Nevertheless, they display a resistance less than 30 kΩ, comparable to the most transparent contacts obtained with previous techniques [1].

In this work we present an alternative method for edge contacting CNTs. Unlike the method demonstrated by Huang et. al., we do not pick up the CNT. Instead we grow CNTs directly on few-layer hexagonal boron nitride (hBN) by chemical vapor deposition. We cover the interesting CNT portion by a second hBN layer by simple dry stamping in nitrogen atmosphere. Edge contacts are then fabricated using a similar recipe as for the production of graphene edge contacts. The simplicity of our approach is particularly suited for the fabrication of hybrid 2D-1D material structures based on ultra-clean CNTs.
J.-W. Huang et. al. Nano Lett. 15, 6836 (2015)