Journal ArticleDOI
Helical microtubules of graphitic carbon
TLDR
Iijima et al. as mentioned in this paper reported the preparation of a new type of finite carbon structure consisting of needle-like tubes, which were produced using an arc-discharge evaporation method similar to that used for fullerene synthesis.Abstract:
THE synthesis of molecular carbon structures in the form of C60 and other fullerenes1 has stimulated intense interest in the structures accessible to graphitic carbon sheets. Here I report the preparation of a new type of finite carbon structure consisting of needle-like tubes. Produced using an arc-discharge evaporation method similar to that used for fullerene synthesis, the needles grow at the negative end of the electrode used for the arc discharge. Electron microscopy reveals that each needle comprises coaxial tubes of graphitic sheets, ranging in number from 2 up to about 50. On each tube the carbon-atom hexagons are arranged in a helical fashion about the needle axis. The helical pitch varies from needle to needle and from tube to tube within a single needle. It appears that this helical structure may aid the growth process. The formation of these needles, ranging from a few to a few tens of nanometres in diameter, suggests that engineering of carbon structures should be possible on scales considerably greater than those relevant to the fullerenes. On 7 November 1991, Sumio Iijima announced in Nature the preparation of nanometre-size, needle-like tubes of carbon — now familiar as 'nanotubes'. Used in microelectronic circuitry and microscopy, and as a tool to test quantum mechanics and model biological systems, nanotubes seem to have unlimited potential.read more
Citations
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Black perspectives for a green future: hydrothermal carbons for environment protection and energy storage
TL;DR: In this article, the authors provide an overview on recently developed carbon material technology synthesised from the hydrothermal carbonisation (HTC) approach, with a particular focus on the carbon formation mechanism, perspectives on large scale production, nanostructuring, functionalisation and applications.
Journal ArticleDOI
One-dimensional steeplechase for electrons realized
Mikael Björk,Jonas Ohlsson,T Sass,Ann Persson,Claes Thelander,Martin Magnusson,Knut Deppert,Reine Wallenberg,Lars Samuelson +8 more
TL;DR: In this article, the growth of one-dimensional semiconductor nanocrystals, nanowhiskers, is reported, in which segments of the whisker with different composition are formed, illustrated by InAs whiskers containing segments of InP.
Journal ArticleDOI
Carbon Nanotube−Inorganic Hybrids
TL;DR: In Situ Synthesis Directly on the CNT Surface, Properties and Potential Applications of CNT-Inorganic Hybrids 1368, and Comparison of Synthesis Techniques 1368.
Journal ArticleDOI
Nanofluids containing multiwalled carbon nanotubes and their enhanced thermal conductivities
TL;DR: In this article, a concentrated nitric acid was used to disentangle CNT aggregates for producing CNT nanofluids, which were successfully dispersed into polar liquids like distilled water, ethylene glycol and decene with oleylamine as surfactant.
Journal ArticleDOI
Experimental observation of scaling laws for alternating current and direct current conductivity in polymer-carbon nanotube composite thin films
B. E. Kilbride,Jonathan N. Coleman,J. Fraysse,Patrick Fournet,Martin Cadek,Anna Drury,Stefan Hutzler,S. Roth,Werner J. Blau +8 more
TL;DR: In this article, alternating current and direct current (DC) conductivities have been measured in polymer-nanotube composite thin films for a range of concentrations of multi-wall nanotubes in two polymer hosts.
References
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Journal ArticleDOI
C 60 : Buckminsterfullerene
Harold W. Kroto,Harold W. Kroto,James R. Heath,Sean C. O'Brien,Robert F. Curl,Richard E. Smalley +5 more
TL;DR: In this article, the authors proposed a truncated icosahedron, a polygon with 60 vertices and 32 faces, 12 of which are pentagonal and 20 hexagonal.
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Solid C60: a new form of carbon
TL;DR: In this article, a new form of pure, solid carbon has been synthesized consisting of a somewhat disordered hexagonal close packing of soccer-ball-shaped C60 molecules.
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Filamentous growth of carbon through benzene decomposition
TL;DR: Carbon fibres have been prepared by pyrolysing a mixture of benzene and hydrogen at about 1100°C and have been studied by high resolution electron microscopy.
Journal ArticleDOI
Cohesive mechanism and energy bands of solid C60.
Susumu Saito,Atsushi Oshiyama +1 more
TL;DR: In this paper, the authors present microscopic total energy calculations which provide a cohesive property and electronic structures of a new form of solid carbon, the face-centered-cubic crystal (fcc ${\mathrm{C}}_{60}$).
Journal ArticleDOI
Growth, Structure, and Properties of Graphite Whiskers
TL;DR: Graphite whiskers have been grown in a dc arc under a pressure of 92 atmospheres of argon and at 3900°K as discussed by the authors, with recoverable lengths up to 3 cm. They are embedded in a solid matrix of graphite which builds up by diffusion of carbon vapor from the positive to the negative electrode.