Metallic electrical transport in inter-graphitic planes of an individual tubular carbon nanocone

Wang, Q; Gao, Rungang; Qu, Shiliang; Li, J J; Gu, Changzhi

doi:10.1088/0957-4484/20/14/145201

Cited by 7 publications

(6 citation statements)

References 30 publications

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“…Many efforts have been made to synthesize nanostructured carbon materials, such as carbon nanotubes (CNTs), 1 fullerenes, 2 carbon nanocones, 3 carbon nanohorns (CNHs) 4 and graphenes 5 because of their unique physical and chemical properties. Additionally, carbon nanocages (CNCs), a kind of nanocarbon with a graphitic shell and a hollow interior, notably show great potential applications in extensive fields, such as catalyst support materials in fuel cells, [6][7][8] electrode materials for lithium-ion batteries 9 and supercapacitors 10 with the advantages of their low density, large surface area, good electrical conductivity as well as performance stability.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of thin-walled carbon nanocages and their application as a new kind of nanocontainer

Teng

Wang

2011

J. Mater. Chem.

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Carbon nanocages (CNCs) with a hollow core and a thin wall of a few graphitic layers have a wide range of applications. However, the preparation of such a material remains a great challenge. In this study, we report the preparation of thin-walled CNCs through the pyrolysis of a mixture composed of pyridine and liquid iron pentacarbonyl, subsequent heat treatment in the presence of NH 4 Cl at a low temperature, and finally washing and filtering in water. The finding that pyridine is completely mutually soluble with liquid iron pentacarbonyl in any proportion stands out to be a crucial advantage for reducing the thickness of the graphitic wall formed on a metal core. To obtain hollow CNCs, heattreatment proves to be simple and effective in removing the metal core and, more importantly, maintaining the thin graphitic wall when compared with conventional boiling in a strong oxidant, such as HNO 3 . The thin-walled hollow CNCs are demonstrated to be suitable nanocontainers for encapsulating iodine, as iodine can easily get into and out of the CNCs when it is heated at a relatively low temperature. Considering the large internal space and thin graphitic wall, the hollow CNCs could be widely used in many fields, such as biology, medicine and chemistry.

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Section: Introductionmentioning

confidence: 99%

Synthesis of thin-walled carbon nanocages and their application as a new kind of nanocontainer

Teng

Wang

2011

J. Mater. Chem.

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“…In addition to microwave plasma, other methods such as gravity, [ 66 ] electron beam, [ 65 ] bias, [ 18 ] and magnetic field/ electric field coupling [ 67 ] have been used to assist CVD to synthesize CNCs or CNC‐containing composite structures.…”

Section: Synthesis Methods and Possible Formation Mechanisms Of Conicmentioning

confidence: 99%

“…CNCs and carboncones, constituted by sp 2 ‐hybridized carbons, can be stiffer than CNTs. [ 14 ] The unique conical shape, hollow structure, and different cone angles, lengths, and defects impart various intriguing physical and chemical properties to CNCs, such as a large electrostatic dipole moment, [ 15 ] strong resonant states, [ 16 ] high thermal conductivity, [ 17 ] metallic electrical transport, [ 18 ] and unusual stacking of graphene sheets depending on the mechanical strength and cone angle. [ 19 ] Furthermore, the number of pentagons and the topology at the cone apex significantly affect the local density of states (LDOS).…”

Section: Introductionmentioning

confidence: 99%

The Synthesis of Conical Carbon

et al. 2021

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Conical carbon, specifically multi‐walled carbon nanocones (CNCs) and single‐walled carboncones, is a new class of sp2‐hybridized carbon allotrope, in addition to fullerene, carbon nanotubes (CNTs), and graphene. Characterized by a conical and delocalized aromatic configuration, the conical carbon structure is considered the intermediate structure between planar graphene and open‐cage fullerene. CNCs can be stiffer than CNTs and exhibit intriguing physical and chemical properties owing to their unique hollow conical structure, which make these materials promising for application as field emission sources and scanning probes. The research on conical carbon structures is in its nascent stage, mainly because of the limitations in the synthesis and purification of conical carbons. This review summarizes the significant progress in the synthesis of CNCs and carboncones. Particularly, the synthetic methods, which can be divided into traditional physical‐chemical synthesis methods for multi‐walled CNCs and emerging bottom‐up organic synthesis methods for single‐walled carboncones, are comprehensively discussed. In addition, the advantages and disadvantages of the various synthetic methods as well as the possible formation and growth mechanisms of CNCs and carboncones are discussed. Finally, some outlooks on the potential solutions to the synthesis of single‐walled carboncones with uniform apex angles are presented.

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“…It should be mentioned that lattice defects make ZnO film more effective to adsorb oxygen and water molecules. According to the work of Peng et al [17] and Liao et al, [18,19] especially our previous work on the electronic transport of individual graphitic fiber, [20] a back-to-back double diode model can be employed to explain the electronic transport properties of ZnO nanowire film modulated by humidity and ultraviolet illumination. The schematic diagrams of the back-to-back double diodes model and relevant energy band are shown in Fig.…”

Section: Photoluminescence and Raman Spectramentioning

confidence: 99%

Physical model for the exotic ultraviolet photo-conductivity of ZnO nanowire films

Pan¹,

Ren²,

Qu³

et al. 2013

Chinese Phys. B

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Employing a simple and efficient method of electro-chemical anodization, ZnO nanowire films are fabricated on Zn foil, and an ultraviolet (UV) sensor prototype is formed for investigating the electronic transport through back-to-back double junctions. The UV (365 nm) responses of surface-contacted ZnO film are provided by I-V measurement, along with the current evolution process by on/off of UV illumination. In this paper, the back-to-back metal-seconductor-metal (M-S-M) model is used to explain the electronic transport of a ZnO nanowire film based structure. A thermionic-field electron emission mechanism is employed to fit and explain the as-observed UV sensitive electronic transport properties of ZnO film with surface-modulation by oxygen and water molecular coverage.

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Metallic electrical transport in inter-graphitic planes of an individual tubular carbon nanocone

Cited by 7 publications

References 30 publications

Synthesis of thin-walled carbon nanocages and their application as a new kind of nanocontainer

Synthesis of thin-walled carbon nanocages and their application as a new kind of nanocontainer

The Synthesis of Conical Carbon

Physical model for the exotic ultraviolet photo-conductivity of ZnO nanowire films

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