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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Conducting Polyaniline Nanowire and Its Applications in Chemiresistive Sensing
Edward Song,Jin-Woo Choi +1 more
TL;DR: In this review, the basic properties of polyaniline nanowires including chemical structures, redox chemistry, and method of synthesis are discussed and a comprehensive literature survey on chemiresistive/conductometric sensors based on polyAniline Nanowires is presented.
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Synthesis of Bi2WO6 Nanoplate-Built Hierarchical Nest-like Structures with Visible-Light-Induced Photocatalytic Activity
Ju Wu,Fang Duan,Yan Zheng,Yi Xie +3 more
TL;DR: In this paper, the formation mechanism and effect of reaction time on the products were investigated and the photocatalytic property demonstrated that the as-synthesized Bi2WO6 structures showed excellent photocatalysis activity exposure to visible light irradiation.
Journal ArticleDOI
Synthesis of carbon nanotubes by catalytic chemical vapour deposition: A review on carbon sources, catalysts and substrates
Khurshed A. Shah,Bilal A. Tali +1 more
TL;DR: In this paper, the role of carbon sources, catalysts and substrates with regard to CCVD synthesis of carbon nanotubes is reviewed in light of latest developments and understandings in the field.
Journal ArticleDOI
Carbon Nanotubes: Applications in Pharmacy and Medicine
TL;DR: This minireview examines the pharmacokinetics, metabolism and toxicity of different forms of CNTs and discusses the perspectives, the advantages and the obstacles of this promising bionanotechnology in the future.
Journal ArticleDOI
Scalable One‐Step Wet‐Spinning of Graphene Fibers and Yarns from Liquid Crystalline Dispersions of Graphene Oxide: Towards Multifunctional Textiles
Rouhollah Jalili,Seyed Hamed Aboutalebi,Dorna Esrafilzadeh,Roderick L. Shepherd,Jun Chen,Sima Aminorroaya-Yamini,Konstantin Konstantinov,Andrew I. Minett,Joselito M. Razal,Gordon G. Wallace +9 more
TL;DR: In this paper, a rational relation between GO sheet size and polydispersity, concentration, liquid crystallinity, and spinnability is proposed, leading to an understanding of lyotropic LC behavior and fiber spinnable.
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.