The electronic properties of suspended single wall carbon nanotubes

Hassanien, A.; Tokumoto, M.

doi:10.1016/j.carbon.2004.06.009

Cited by 14 publications

(12 citation statements)

References 10 publications

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“…For Au(111), the middle of the band gap is measured above the Fermi level by a few hundred meV [ Fig. 1(a)], which is in agreement with previous measurements [8][9][10]13,15 and calculations. [26][27][28][29][30] Note that in the case of metallic tubes, similar behavior is found when considering the middle point between the first van Hove singularities.…”

Section: Resultssupporting

confidence: 90%

“…It was thus shown that the configuration of adsorbed nanotubes is in good agreement with what can be expected for free-standing tubes. [8][9][10][11][12][13][14][15][16][17] However, because of the interaction with the substrate, fine effects take place such as a broadening of the van Hove singularities resulting from hybridization with surface wave functions. 8,26 In the region around the Fermi level, the STS spectrum of a nanotube adsorbed on a metal is not symmetrically positioned around the zero bias voltage.…”

Section: Resultsmentioning

confidence: 99%

“…The early STM experiments on SWCNT have provided highly valuable details on their structure and their related electronic properties. [8][9][10][11][12][13][14][15][16][17] However, little attention was given to the effect of the adsorption to a metal substrate, and essentially only Au(111) surfaces were used. Here we propose systematic investigations on the interaction of a SWCNT with well-defined Au(111) and Cu(111) metal surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Energy level alignment of single-wall carbon nanotubes on metal surfaces

2011

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We studied the electronic configuration of single-wall carbon nanotubes adsorbed on well-defined Au(111) and Cu(111) surfaces. We found opposite behaviors for their energy-level alignment with metal: nanotubes are p-doped on Au(111) and n-doped on Cu(111). The doping level is not uniquely defined for a particular metal surface but rather exhibits a distribution depending on several uncontrolled factors such as nanotube geometry and adsorption configuration.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Energy level alignment of single-wall carbon nanotubes on metal surfaces

2011

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“…19,43,44 A careful look at the region around the Fermi level reveals that the STS spectrum of a nanotube adsorbed on Au(111) is not symmetrically positioned around the zero bias voltage (Figure 1(e)). The middle of the band gap is measured above the Fermi level by a few tenths of eV in agreement with the previous measurements 16,17,19,23,45 and calculations. 43,46,47 A charge transfer between the nanotube and the surface is responsible for this asymmetry in the gap and was estimated to amount 0.1 electron for an armchair tube.…”

supporting

confidence: 78%

Electronic modulations in a single wall carbon nanotube induced by the Au(111) surface reconstruction

Clair

Shin

Kim

et al. 2015

Applied Physics Letters

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The structural and electronic structure of single wall carbon nanotubes adsorbed on Au(111) has been investigated by low-temperature scanning tunneling microscopy and spectroscopy. The nanotubes were dry deposited in situ in ultrahigh vacuum onto a perfectly clean substrate. In some cases, the native herringbone reconstruction of the Au(111) surface interacted directly with adsorbed nanotubes and produced long-range periodic oscillations in their local density of states, corresponding to charge transfer modulations along the tube axis. This effect, however, was observed not systematically for all tubes and only for semiconducting tubes.

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“…If we compare our results with already published ones, we can see that these kind of survey are mainly carried out on SW or doped-MWCNTs. Anyway we can state that currents measured with STS, in the same voltage range used by us, can vary from several nA [17][18][19] up to A 20 for semiconductor and metal CNTs as well. This means that CNTs conductivity is deeply affected by their intrinsic shape and morphology, which are influenced also by growing methods.…”

Section: Resultsmentioning

confidence: 98%

Thermal and Electronic Properties of Macroscopic Multi-Walled Carbon Nanotubes Blocks

Castellino¹,

Tortello²,

Bianco³

et al. 2010

J. Nanosci. Nanotech.

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Massive carpets of well packed, vertically aligned and very long multiwall carbon nanotubes were synthesized by an efficient thermal Chemical Vapour Deposition process. Electrical properties of the material were evaluated, both in terms of "global" characteristics (bulk resistivity) and in terms of "local" properties (Scanning Tunnel Spectroscopy measurements) for as-grown and annealed at different temperatures samples. The behaviour of bulk resistivity as a function of temperature was evaluated in the range 3-300 K, with a four-probe technique. The resistivity shows a linear dependence with the square root of temperature in the investigated range. From the electrical analyses, it was found that the quality of the MWNTs was improved by the annealing process, since the resistivity decreases. Heat transport properties were evaluated by the laser flash technique in order to study thermal diffusivity. Moreover high temperature behavior of the specific heat capacity of single and multi-wall carbon nanotubes, was measured up to 800 K with a Differential Scanning Calorimeter.

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The electronic properties of suspended single wall carbon nanotubes

Cited by 14 publications

References 10 publications

Energy level alignment of single-wall carbon nanotubes on metal surfaces

Energy level alignment of single-wall carbon nanotubes on metal surfaces

Electronic modulations in a single wall carbon nanotube induced by the Au(111) surface reconstruction

Thermal and Electronic Properties of Macroscopic Multi-Walled Carbon Nanotubes Blocks

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