Molecular Motion of Endohedral Fullerenes in Single‐Walled Carbon Nanotubes

Khlobystov, Andrei N.; Porfyrakis, Kyriakos; Kanai, Mito; Britz, David A.; Ardavan, Arzhang; Shinohara, Hisanori; Dennis, T. John S.; Briggs, G. Andrew D.

doi:10.1002/ange.200352389

Cited by 16 publications

(7 citation statements)

References 20 publications

(26 reference statements)

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“…Open‐ended carbon nanotubes provide internal cavities (1–2 nm in diameter) that are capable of accommodating organic molecules and biomolecules of respective sizes. For example, it has been shown that open SWCNTs can accommodate fullerenes56 and small proteins such as cytochrome c inside their internal cavities, leading to the stable immobilization of the proteins in bioactive conformations 57. DNA could also enter into the carbon nanotube cavities, and DNA transport through a single MWCNT channel has been directly followed by fluorescence microscopy 58.…”

Section: Functionalization Of Carbon Nanotubes With Biomoleculesmentioning

confidence: 99%

Biomolecule‐Functionalized Carbon Nanotubes: Applications in Nanobioelectronics

2004

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Carbon nanotubes (CNTs) revealing metallic or semiconductive properties depending on the folding modes of the nanotube walls represent a novel class of nanowires. Different methods to separate semiconductive CNTs from conductive CNTs have been developed, and synthetic strategies to chemically modify the side walls or tube ends by molecular or biomolecular components have been reported. Tailoring hybrid systems consisting of CNTs and biomolecules (proteins and DNA) has rapidly expanded and attracted substantial research effort. The integration of biomaterials with CNTs enables the use of the hybrid systems as active field-effect transistors or biosensor devices (enzyme electrodes, immunosensors, or DNA sensors). Also, the integration of CNTs with biomolecules has allowed the generation of complex nanostructures and nanocircuitry of controlled properties and functions. The rapid progress in this interdisciplinary field of CNT-based nanobioelectronics and nanobiotechnology is reviewed by summarizing the present scientific accomplishments, and addressing the future goals and perspectives of the area.

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Section: Functionalization Of Carbon Nanotubes With Biomoleculesmentioning

confidence: 99%

Biomolecule‐Functionalized Carbon Nanotubes: Applications in Nanobioelectronics

2004

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“…(288 kJ mol À1 ) for C 60 and a single-walled carbon nanotube (SWNT), [6] and can be higher for larger fullerene cages. Previously, we [5,7,8] and others [9,10] have exploited the unique affinity of nanotubes to absorb fullerenes with metals inside leading to (M@C n )@SWNT structures in an exceptionally high yield (up to 100 %), in which metal atoms are arranged in a perfect chain along the nanotube channel (Figure 1 b).…”

Section: Introductionmentioning

confidence: 99%

A Piggyback Ride for Transition Metals: Encapsulation of Exohedral Metallofullerenes in Carbon Nanotubes

Chamberlain

Champness

Schröder

et al. 2010

Chemistry A European J

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We have developed a method that enables the efficient insertion of transition-metal atoms and their small clusters into carbon nanotubes. As a model system, Os complexes attached to the exterior of fullerene C60 (exohedral metallofullerenes) were shown to be dragged into the nanotube spontaneously and irreversibly due to strong van der Waals interactions, specific to fullerenes and carbon nanotubes. The size of the metal-containing groups attached to C60 was shown to be critical for successful insertion, as functional groups too bulky to enter the nanotube were stripped off the fullerene during the encapsulation process. Once inside the nanotube, Os atoms catalyse polymerisation and decomposition of fullerene cages, which is related to a much higher catalytic activity of metal atoms situated on the surface of the fullerene cage, as compared to metal atoms in endohedral fullerenes, such as M@C82. Thus, exohedral metallofullerenes show promise for applications in catalysis in carbon “nano” test tubes.

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“…[12] This reduction process also explains why the silver nanoparticles were not observed in the initial SEM study: the silver nanoparticles are enclosed inside the VO x matrix giving an inorganic Ag-in-VO x peapod (c.f. organic carbon nanotube systems), [13] which is stable under SEM conditions, in which the sample is also coated by gold through sputtering. This observation is further verified by the high mechanical stability of the silver nanoparticle/vanadium oxide interface.…”

Section: Methodsmentioning

confidence: 99%

Supramolecular Silver Polyoxometalate Architectures Direct the Growth of Composite Semiconducting Nanostructures

et al. 2009

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The controlled bottom-up assembly of nanostructured materials from molecular precursors has great promise if molecular synthetic control can be translated to the nanoscale. [1] This is because the assembly of molecules in the lownanometer domain (0.5-5 nm) is possible by bottom-up molecular self-assembly [2] yet is not possible for top-down methods owing to the present limitations of lithography (ca. 10 nm). In our own work we have hypothesized [3] that linkable polyoxometalates (POMs) (anionic transition-metal-oxide clusters) have great potential to direct nanomaterial growth, [4] since POMs themselves are molecular, yet can approach 5 nm in size for the largest known cluster. [5] Although POMs have a host of applications, [6] they have not yet been extensively exploited as precursors for the formation of composite metal oxide nanostructures, because they first need to be linked into highly organized arrays. One of the most successful assembly methods to connect POM clusters involves the coordination of secondary transition metal species, thereby giving access to a range of molecular materials with diverse structures and properties. [7] In this respect we have been using silver-based linkers to generate POM-based 0-, 1-, 2-, and 3D frameworks using cation control, in which silver ions are ligated mainly in an oxo-based ligand environment. [8] Herein, we demonstrate that it is possible to embed {Ag 3 } and {Ag 1 } units with [H 2 V 10 O 28 ] 4À clusters into supramolecular architectures, giving compounds 1, a 1D zigzag chain, and 2, a 2D network (see Figure 1). Furthermore, we show that these crystalline precursors can be utilized in a novel reactive-template route for the gram-scale production of composite semiconducting vanadium oxide nanowires incorporating discrete silver nanoparticles. [9] We also demonstrate that the crystalline longrange ordering of the precursors is an essential prerequisite for the nanostructure formation, as identical amorphous compounds do not yield the composite nanowires. The synthetic route for the nanowire production involves the simultaneous reduction and degradation of the silver polyoxovanadate precursors 1 or 2 to form a composite Ag@VO x nanowire system (3) in which metallic silver nanoparticles are embedded within a semiconducting vanadium oxide VO x matrix.Compounds 1 and 2 are two structurally closely related crystalline silver polyoxovanadate precursors that were developed to investigate their transformation into nanostructured composite materials. Compounds 1 and 2 were synthesized by the reaction of silver(I) nitrate with tetra-n-butylammonium decavanadate, (nBu 4 N) 3 [H 3 V 10 O 28 ] in dimethyl sulfoxide (DMSO)/acetonitrile mixtures in 49 % and 34 % yield, respectively. Single-crystal X-ray diffraction analysis, [10] along with chemical analysis, and bond valence sum calculations allowed the formulae to be assigned. The crystallographic analysis of the materials showed that 1 and 2 feature virtually identical structural building blocks (Figure 1) 3+ (= {Ag 3 }) bin...

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Molecular Motion of Endohedral Fullerenes in Single‐Walled Carbon Nanotubes

Cited by 16 publications

References 20 publications

Biomolecule‐Functionalized Carbon Nanotubes: Applications in Nanobioelectronics

Biomolecule‐Functionalized Carbon Nanotubes: Applications in Nanobioelectronics

A Piggyback Ride for Transition Metals: Encapsulation of Exohedral Metallofullerenes in Carbon Nanotubes

Supramolecular Silver Polyoxometalate Architectures Direct the Growth of Composite Semiconducting Nanostructures

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