Mapping of functionalized regions on carbon nanotubes by scanning tunneling microscopy

Details Mapping of functionalized regions on carbon nanotubes by scanning tunneling microscopy Mapping of functionalized regions on carbon nanotubes by scanning tunneling microscopy

2010-09-07

arxiv.org/abs/1009.1290v1

J. Phys. Chem. C. 115 (2011) 3229-3235

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Keywords: functionalization, carbon nanotubes, few layer graphene, STM, CITS, STS

Scientific paper

10.1021/jp108908s

Scanning tunneling microscopy (STM) gives us the opportunity to map the surface of functionalized carbon nanotubes in an energy resolved manner and with atomic precision. But this potential is largely untapped, mainly due to sample stability issues which inhibit reliable measurements. Here we present a simple and straightforward solution that makes away with this difficulty, by incorporating the functionalized multiwalled carbon nanotubes (MWCNT) into a few layer graphene - nanotube composite. This enabled us to measure energy resolved tunneling conductance maps on the nanotubes, which shed light on the level of doping, charge transfer between tube and functional groups and the dependence of defect creation or functionalization on crystallographic orientation.

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