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Chinese Chemical Letters - Impact Factor: 2. The journal has been indexed by Science Citation Index-Expanded since The total citation rate and impact factor of the CCL in were and 1. Full Paper Presentation and Publication 2. Submission Deadline. Notification Date. Registration Deadline. Citations Publications citing this paper. Carbon nanomaterials and amyloid-beta interactions: potentials for the detection and treatment of Alzheimer's disease?

Barreto , Amir Hossein Sahebkar. Carbon nanotubes as molecular transporters to study a new mechanism for molecular entry into the cell nucleus using actin polymerization force Shaghayegh Sadr Karimi , Nelly Pante. Lignin-based polymers and nanomaterials. Adam S. Grossman , Wilfred Vermerris. A novel galactose-PEG-conjugated biodegradable copolymer is an efficient gene delivery vector for immunotherapy of hepatocellular carcinoma. References Publications referenced by this paper.

This study not only provides material platforms for electronic applications of semiconducting SWCNTs but also contributes to fundamental understanding of the growth mechanism and controlled synthesis of SWCNTs. Nature , , 61 — 64 , DOI: Over the past two decades, single-walled carbon nanotubes SWCNTs have received much attention because their extraordinary properties are promising for numerous applications.

Many of these properties depend sensitively on SWCNT structure, which is characterized by the chiral index n,m that denotes the length and orientation of the circumferential vector in the hexagonal carbon lattice.

Electronic properties are particularly strongly affected, with subtle structural changes switching tubes from metallic to semiconducting with various bandgaps. Monodisperse 'single-chirality' i. Controlled synthesis through catalyst engineering, end-cap engineering or cloning strategies, and also tube sorting based on chromatog.

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The use of template mols. Here we show that this bottom-up strategy can produce targeted nanotubes: we convert mol. We expect that our on-surface synthesis approach will provide a route to nanotube-based materials with highly optimized properties for applications such as light detectors, photovoltaics, field-effect transistors and sensors.

Helical Microtubules of Graphitic Carbon. Nature , , 56 — 58 , DOI: The prepn.


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Produced using an arc-discharge evapn. On each tube, the C-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. This helical structure may aid growth. The formation of these needles, ranging from a few to a few tens of nanometers in diam. Recent research progress in nanostructured carbon has built upon and yet advanced far from the studies of more conventional carbon forms such as diamond, graphite, and perhaps coals. To some extent, the great attention to nano-carbons has been ignited by the discovery of the structurally least obvious, counterintuitive, small strained fullerene cages.

Carbon nanotubes, discovered soon thereafter, and recently, the great interest in graphene, ignited by its extraordinary physics, are all interconnected in a blend of cross-fertilizing fields. Here we review the theor. Our particular emphasis is on the role of certain transcending concepts like elastic instabilities, dislocations, edges, etc. Elliott, James A. Discussed is the prepn. Although many groups have modeled this process using a variety of techniques, we ask whether there are any complementary ideas emerging from the different proposed growth mechanisms, and whether different modeling techniques can give the same answers for a given mechanism.

Subsequently, by comparing the results of tight-binding, semi-empirical MO theory, and reactive bond order force field calcns. Ni is thermodynamically stable with respect to the corresponding amorphous metal and carbon structures. It is shown in principle how a complementary heterogeneous nucleation step may play a key role in the transformation from amorphous carbon to graphene on the metal surface.

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Achieving the conditions under which this complementary crystn. Carbon , 58 , 2 — 39 , DOI: Due to its higher degree of control and its scalability, catalytic chem. Catalytic chem. Significant progress has been made in the field of nanotube synthesis by this method although nanotube samples still generally suffer from a lack of structural control.

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This illustrates the fact that numerous aspects of the growth mechanism remain poorly understood. The first part of this review is dedicated to a summary of the general background useful for beginners in the field. This background relates to the carbon precursors, the catalyst nanoparticles, their interaction with carbonaceous compds.

The second part provides an updated review of the influence of the synthesis parameters on the features of nanotube samples: diams.

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The third part is devoted to important and still open questions, such as the mechanism of nanotube nucleation and the chiral selectivity, and to the hypotheses currently proposed to answer them. IOP Publishing Ltd. The discovery of C nanotubes CNTs and graphene over the last two decades has heralded a new era in physics, chem. During this time, intense efforts were made towards understanding the at. Here the authors review mol. This review highlights an often-overlooked aspect of CNT and graphene formation-that the two processes, although seldom discussed in the same terms, are in fact remarkably similar.

The difference in the final structure CNT or graphene is detd. More than 20 years after their discovery, our understanding of the growth mechanisms of single-wall carbon nanotubes is still incomplete, in spite of a large number of investigations motivated by potential rewards in many possible applications. Among the many techniques used to solve this challenging puzzle, computer simulations can directly address an atomic scale that is hardly accessible by other experiments, and thereby support or invalidate different ideas, assumptions, or models.

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In this paper, we review some aspects of the computer simulation and theoretical approaches dedicated to the study of single-wall carbon nanotube growth, and suggest some ways towards a better control of the synthesis processes by chemical vapor deposition. MRS Bull. Cambridge University Press. Nanocarbons have been catalytically grown since However, even today, the formation mechanisms of carbon nanotubes CNTs and graphene are not sufficiently understood.


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  • This sustained challenge has been an engine for the development in theory concepts and computational methods, tackling the problem of well-controlled prodn. This article discusses how exptl. Key aspects include the mechanisms of nucleation and CNT-liftoff, chiral symmetry selection and control, rates of growth and island shapes, mechanisms defining single chirality of the nanotubes, and ways to suppress grain boundaries in the quest for ever larger and faster growing single-crystal graphene, or longest defect-free CNTs.

    The theme of catalyst chem. Bachilo, Sergei M. Unusually structure-selective growth of single-walled carbon nanotubes SWNTs has been attained using a CVD method with a solid supported catalyst. In this method, CO feedstock disproportionates on silica-supported catalytic nanoclusters of Co that are formed in situ from mixed salts of Co and Mo.

    The nanotube products are analyzed by spectrofluorimetry to reveal distributions resolved at the level of individual n,m structures. Two structures, 6,5 and 7,5 , together dominate the semiconducting nanotube distribution and comprise more than one-half of that population.

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    B , , — , DOI: The n,m population distribution of single-walled carbon nanotubes obtained on supported CoMo catalysts has been detd. It has been found that the n,m distribution can be controlled by varying the gaseous feed compn. By contrast, by changing the support from SiO2 to MgO, nanotubes with similar diam. Finally, keeping the same reaction conditions but varying the compn. He, Maoshuai; Chernov, Alexander I. Outi I. We have developed a magnesia MgO -supported iron-copper FeCu catalyst to accomplish the growth of single-walled carbon nanotubes SWNTs using carbon monoxide CO as the carbon source at ambient pressure.

    The FeCu catalyst system facilitates the growth of small-diam. SWNTs with a narrow diam. UV-vis-NIR optical absorption spectra and photoluminescence excitation PLE mapping were used to evaluate the relative quantities of the different n,m species. We have also demonstrated that the addn. B: Condens. Matter Mater.