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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Journal ArticleDOI
Highly-ordered carbon nanotube arrays for electronics applications
TL;DR: In this article, high-ordered arrays of parallel carbon nanotubes were grown by pyrolysis of acetylene on cobalt within a hexagonal close-packed nanochannel alumina template at 650°C.
Journal ArticleDOI
Colloquium: Reactive plasmas as a versatile nanofabrication tool
TL;DR: In this article, the benefits and challenges of using plasma-based systems in nanofabrication of nanostructured silicon films, low-dimensional semiconducting quantum structures, ordered carbon nanotip arrays, highly crystalline ${\mathrm{TiO}}_{2}$ coatings, and nano-structured hydroxyapatite bioceramics are discussed.
Journal ArticleDOI
Synthesis and characterization of helical multi-shell gold nanowires
Yukihito Kondo,Kunio Takayanagi +1 more
TL;DR: Suspended gold nanowires were made in an ultra-high vacuum and shown to have a multi-shell structure composed of coaxial tubes, resulting in magic shell-closing numbers.
Journal ArticleDOI
Carbon Nanotube−Chitosan System for Electrochemical Sensing Based on Dehydrogenase Enzymes
TL;DR: The CNT-CHIT system represents a simple and functional approach to the integration of dehydrogenases and electrodes, which can provide analytical access to a large group of enzymes for wide range of bioelectrochemical applications including biosensors and biofuel cells.
Journal ArticleDOI
Catalytic growth of carbon microtubules with fullerene structure
TL;DR: In this article, a method to grow carbon microtubules with fullerene structure (buckytubes) has been identified, which consists of the catalytic decomposition of acetylene over iron particles at 700 °C.
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.
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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.