Electronic transport in carbon nanotubes: Diffusive and localized regimes

Sundqvist, P.; García‐Vidal, F. J.

doi:10.1103/physrevb.78.205427

Cited by 14 publications

(10 citation statements)

References 20 publications

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“…Resistivity as low as 10 6 Ω −1 cm −1 was reported in single walled carbon nanotubes (SWCNTs) (Purewal et al, 2007), while multi-walled carbon nanotubes (MWCNTs) have shown resistivity of 5 × 10 6 Ω −1 cm −1 (Schönenberger et al, 1999); the difference being attributed to the change in respective diameters (Lekawa-Raus et al, 2014). The increased length of carbon nanotubes can promote conduction, provided it is within the length scale of the ballistic regime (Sundqvist et al, 2008) and that the CNTs form a good percolated network. One of the most exciting directions of CNT-based materials and structures is the use of CNT/polymer composites due to their enhanced mechanical (high strength and durability upon formation of a percolated network) and electrical properties (Ajayan et al, 2000; Behabtu et al, 2013; Lin et al, 2013; Arash et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

3D Hybrid Scaffolds Based on PEDOT:PSS/MWCNT Composites

Jayaram

Pitsalidis

et al. 2019

Front. Chem.

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Conducting polymer scaffolds combine the soft-porous structures of scaffolds with the electrical properties of conducting polymers. In most cases, such functional systems are developed by combining an insulating scaffold matrix with electrically conducting materials in a 3D hybrid network. However, issues arising from the poor electronic properties of such hybrid systems, hinder their application in many areas. This work reports on the design of a 3D electroactive scaffold, which is free of an insulating matrix. These 3D polymer constructs comprise of a water soluble conducting polymer (PEDOT:PSS) and multi-walled carbon nanotubes (MWCNTs). The insertion of the MWCNTs in the 3D polymer matrix directly contributes to the electron transport efficiency, resulting in a 7-fold decrease in resistivity values. The distribution of CNTs, as characterized by SEM and Raman spectroscopy, further define the micro- and nano-structural topography while providing active sites for protein attachment, thereby rendering the system suitable for biological/sensing applications. The resulting scaffolds, combine high porosity, mechanical stability and excellent conducting properties, thus can be suitable for a variety of applications ranging from tissue engineering and biomedical devices to (bio-) energy storage.

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Section: Introductionmentioning

confidence: 99%

3D Hybrid Scaffolds Based on PEDOT:PSS/MWCNT Composites

Jayaram

Pitsalidis

et al. 2019

Front. Chem.

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“…If the length of CNT is larger than the ballistic regime then diffusive transport will be observed . Ballistic transport may also be suppressed owing to increased temperature or high electric fields .…”

Section: Individual Carbon Nanotubesmentioning

confidence: 99%

Electrical Properties of Carbon Nanotube Based Fibers and Their Future Use in Electrical Wiring

Łękawa-Raus

Patmore²,

Kurzepa

et al. 2014

Adv Funct Materials

434

279

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The production of continuous fibers made purely of carbon nanotubes has paved the way for new macro‐scale applications which utilize the superior properties of individual carbon nanotubes. These wire‐like macroscopic assemblies of carbon nanotubes were recognized to have a potential to be used in electrical wiring. Carbon nanotube wiring may be extremely light and mechanically stronger and more efficient in transferring high frequency signals than any conventional conducting material, being cost‐effective simultaneously. However, transfer of the unique properties of individual CNTs to the macro‐scale proves to be quite challenging. This Feature Article gives an overview of the potential of using carbon nanotube fibers as next generation wiring, state of the art developments in this field, and goals to be achieved before carbon nanotubes may be transformed into competitive products.

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“…2 In both cases we assume carriers scattering times τ n = τ p = 2 ps at 300 K, as suggested by the estimates 15,16 . In case (a), there are few carriers and electrons and holes go their separate ways without much interaction, as shown in Fig.…”

Section: Numerical Solutionsmentioning

confidence: 99%

“…5): (a) N 1D ≈ 1.25× 10 5 cm −1 , injected N = 25, N/N c ≈ 0.016, and I max ≈ 4 µA and (b) N 1D ≈ 1.25 × 10 6 cm −1 , N = 250, N/N c ≈ 0.16, and I max ≈ 40 µA. In both cases we assume carriers scattering times τ n = τ p = 2 ps at 300 K, as suggested by the estimates 15,16 .…”

Section: Numerical Solutionsmentioning

confidence: 99%

Dynamics of optically injected currents in carbon nanotubes

et al. 2014

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We consider theoretically the dynamics of electric currents optically injected in carbon nanotubes. Although the plasma oscillations are not seen in these systems, the main effect on the carrier's motion is due to strongly nonuniform space-charge Coulomb forces produced by time-dependent separation of injected electron and hole densities. We calculate evolution of the dipole moment characterizing the time-and coordinate-dependent charge density distributions and analyze different regimes of the dynamics. The developed time-dependent dipole moment leads to a dipole radiation in the THz frequency range for typical parameters of injected currents.

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Electronic transport in carbon nanotubes: Diffusive and localized regimes

Cited by 14 publications

References 20 publications

3D Hybrid Scaffolds Based on PEDOT:PSS/MWCNT Composites

3D Hybrid Scaffolds Based on PEDOT:PSS/MWCNT Composites

Electrical Properties of Carbon Nanotube Based Fibers and Their Future Use in Electrical Wiring

Dynamics of optically injected currents in carbon nanotubes

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