Scanning tunneling spectroscopy of suspended single-wall carbon nanotubes
2004; American Institute of Physics; Volume: 84; Issue: 21 Linguagem: Inglês
10.1063/1.1748836
ISSN1520-8842
AutoresBrian J. LeRoy, Serge G. Lemay, Jing Kong, Cees Dekker,
Tópico(s)Force Microscopy Techniques and Applications
ResumoWe have performed low-temperature STM measurements on single-wall carbon nanotubes that are freely suspended over a trench. The nanotubes were grown by CVD on a Pt substrate with predefined trenches etched into it. Atomic resolution was obtained on the freestanding portions of the nanotubes. Spatially resolved spectroscopy on the suspended portion of both metallic and semiconducting nanotubes was also achieved, showing a Coulomb-staircase behavior superimposed on the local density of states. The spacing of the Coulomb blockade peaks changed with tip position reflecting a changing tip-tube capacitance.
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