Conductance of Sidewall-Functionalized Carbon Nanotubes: Universal Dependence on Adsorption Sites

Garcı́a-Lastra, J. M.; Thygesen, Kristian Sommer; Strange, Mikkel; Rubio, Ángel

doi:10.1103/physrevlett.101.236806

Cited by 46 publications

(55 citation statements)

References 20 publications

(20 reference statements)

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“…are computed based on geometry considerations for a 1-nm diameter nanotube. For the defect-activated reaction, the reaction rate is proportional to the number of sp 3 defect centres available at the reaction front, which initially increases linearly with propagation length. At a higher degree of functionalization, specifically when the propagation length reaches the circumference of the nanotube πd, the reaction propagation becomes confined to the tubular direction.…”

Section: Discussionmentioning

confidence: 99%

“…5), and similar banding structures were found by SEM (except − H) 18 . Covalent sidewall chemistry introduces sp 3 . This allowed us to use the D/G ratio (peak area ratio between the D-band and the G-bands) to follow the reaction progress (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…This defect-activated chemistry bears a remarkable analogy to the high reactivity of nanotube ends 13,14 and step edges in surface science 15,16 . Confinement of the reaction to carbon nanotube 'sp 3 step edges' leads to reaction fronts initiated at defect sites that ultimately propagate along the tubular direction at a constant rate (Fig. 1a).…”

mentioning

confidence: 99%

“…This fundamental question is of central importance to the development of selective chemistries for extended carbon networks, such as single-walled carbon nanotubes (SWNTs) 1 and graphene 2 , in which π-electrons are delocalized over thousands of carbon atoms. Theoretical studies predict that the pattern of functional groups, or defects, will substantially affect the electrical and optical properties of these types of low-dimensional systems 3,4 . Spatially controlled chemistry may find uses in graphene edge engineering 5 , molecular lithography 6 and nanotube electrode networks 7 .…”

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confidence: 99%

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Confined propagation of covalent chemical reactions on single-walled carbon nanotubes

et al. 2011

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Covalent chemistry typically occurs randomly on the graphene lattice of a carbon nanotube because electrons are delocalized over thousands of atomic sites, and rapidly destroys the electrical and optical properties of the nanotube. Here we show that the Billups-Birch reductive alkylation, a variant of the nearly century-old Birch reduction, occurs on single-walled carbon nanotubes by defect activation and propagates exclusively from sp 3 defect sites, with an estimated probability more than 1,300 times higher than otherwise random bonding to the 'π-electron sea'. This mechanism quickly leads to confinement of the reaction fronts in the tubular direction. The confinement gives rise to a series of interesting phenomena, including clustered distributions of the functional groups and a constant propagation rate of 18 ± 6 nm per reaction cycle that allows straightforward control of the spatial pattern of functional groups on the nanometre length scale.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Confined propagation of covalent chemical reactions on single-walled carbon nanotubes

et al. 2011

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“…This is certainly true for a high concentration of them, in which case also the relative distances between the adsorbates play an important role. 41,42 Thus, it is important to get rid of the strongly adsorbed atoms or molecules when processing conductive CNT networks.…”

Section: Transmission Functions For a Cnt With An Adsorbed Tm Atommentioning

confidence: 99%

Enhancing conductivity of metallic carbon nanotube networks by transition metal adsorption

Ketolainen

Havu

Puska

2015

The Journal of Chemical Physics

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The conductivity of carbon nanotube thin films is mainly determined by carbon nanotube junctions, the resistance of which can be reduced by several different methods. We investigate electronic transport through carbon nanotube junctions in a four-terminal configuration, where two metallic single-wall carbon nanotubes are linked by a group 6 transition metal atom. The transport calculations are based on the Green’s function method combined with the density-functional theory. The transition metal atom is found to enhance the transport through the junction near the Fermi level. However, the size of the nanotube affects the improvement in the conductivity. The enhancement is related to the hybridization of chromium and carbon atom orbitals, which is clearly reflected in the character of eigenstates near the Fermi level. The effects of chromium atoms and precursor molecules remaining adsorbed on the nanotubes outside the junctions are also examined.

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Supramolecular Chemistry of Fullerenes and Carbon Nanotubes at Interfaces: Toward Applications

Marega

Giust

Kremer

et al. 2012

Supramolecular Chemistry of Fullerenes and Carbon Nanotubes

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Conductance of Sidewall-Functionalized Carbon Nanotubes: Universal Dependence on Adsorption Sites

Cited by 46 publications

References 20 publications

Confined propagation of covalent chemical reactions on single-walled carbon nanotubes

Confined propagation of covalent chemical reactions on single-walled carbon nanotubes

Enhancing conductivity of metallic carbon nanotube networks by transition metal adsorption

Supramolecular Chemistry of Fullerenes and Carbon Nanotubes at Interfaces: Toward Applications

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