Formation of Decacyclene Nanowire by Rapid Vapor Deposition

Kimura, Takeshi; Koizumi, Hideaki; Kinoshita, Hironobu; Ichikawa, Tsuneki

doi:10.1143/jjap.46.703

Cited by 4 publications

(2 citation statements)

References 21 publications

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“…The important characteristic is that they must be built from nanofragments having important edge surface contribution. Therefore, the synthesis could be approached by a modified conventional KOH activation procedure, 32 rapid vapor deposition 49 or template carbonization method. 50 It is also possible that new nonconventional approaches will be required.…”

Section: ■ Resultsmentioning

confidence: 99%

Hypothetical High-Surface-Area Carbons with Exceptional Hydrogen Storage Capacities: Open Carbon Frameworks

et al. 2012

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A class of high-surface-area carbon hypothetical structures has been investigated that goes beyond the traditional model of parallel graphene sheets hosting layers of physisorbed hydrogen in slit-shaped pores of variable width. The investigation focuses on structures with locally planar units (unbounded or bounded fragments of graphene sheets), and variable ratios of in-plane to edge atoms. Adsorption of molecular hydrogen on these structures was studied by performing grand canonical Monte Carlo simulations with appropriately chosen adsorbent-adsorbate interaction potentials. The interaction models were tested by comparing simulated adsorption isotherms with experimental isotherms on a high-performance activated carbon with well-defined pore structure (approximately bimodal pore-size distribution), and remarkable agreement between computed and experimental isotherms was obtained, both for gravimetric excess adsorption and for gravimetric storage capacity. From this analysis and the simulations performed on the new structures, a rich spectrum of relationships between structural characteristics of carbons and ensuing hydrogen adsorption (structure-function relationships) emerges: (i) Storage capacities higher than in slit-shaped pores can be obtained by fragmentation/truncation of graphene sheets, which creates surface areas exceeding of 2600 m(2)/g, the maximum surface area for infinite graphene sheets, carried mainly by edge sites; we call the resulting structures open carbon frameworks (OCF). (ii) For OCFs with a ratio of in-plane to edge sites ≈1 and surface areas 3800-6500 m(2)/g, we found record maximum excess adsorption of 75-85 g of H(2)/kg of C at 77 K and record storage capacity of 100-260 g of H(2)/kg of C at 77 K and 100 bar. (iii) The adsorption in structures having large specific surface area built from small polycyclic aromatic hydrocarbons cannot be further increased because their energy of adsorption is low. (iv) Additional increase of hydrogen uptake could potentially be achieved by chemical substitution and/or intercalation of OCF structures, in order to increase the energy of adsorption. We conclude that OCF structures, if synthesized, will give hydrogen uptake at the level required for mobile applications. The conclusions define the physical limits of hydrogen adsorption in carbon-based porous structures.

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Section: ■ Resultsmentioning

confidence: 99%

Hypothetical High-Surface-Area Carbons with Exceptional Hydrogen Storage Capacities: Open Carbon Frameworks

et al. 2012

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“…4 Decacyclene and DTI have been shown to form stacked columns with the p-p stacking direction down the length of the column. 4,20,21 Large steric interactions that lead to signicant twisting of the molecular core can disrupt packing, as shown recently for truxenone-based acceptors. 7 However, both decacyclene and DTI have a gently twisted propeller-like geometry (see ESI, Fig.…”

Section: Introductionmentioning

confidence: 82%

Linking morphology and performance of organic solar cells based on decacyclene triimide acceptors

Pho

Eisenmenger

et al. 2014

J. Mater. Chem. A

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Optoelectronic property and sensing applications of crystalline nano/microwires of decacyclene

Wang

et al. 2011

Micro Nano Lett.

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The characterisation and potential sensing applications of nano-and microwires of decacyclene are reported in this study. Attenuated total reflection infrared and differential thermal analyses reveal that the nano/microstructures are composed of aggregated decacyclene molecules that are held by p-p interactions. Transmission electron microscopy images and the electron diffraction patterns show that, in the nanowires, the decacyclene molecules are oriented with their long axis perpendicular to the wires and the p-p stacking direction parallel to the wire. Cross-optical polarised microscopy results shows a birefringent crystal structure of the decacyclene crystalline wires. Fluorescent imaging shows that the crystalline wires might be used as a waveguide material. Both the conductivity and fluorescence of the nanobelts change selectively in the presence of vapour of nitrobenzene, a representative nitroaromatic, suggesting that the nanowires of decacyclene may be used for selective detection of explosives.

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Formation of Decacyclene Nanowire by Rapid Vapor Deposition

Cited by 4 publications

References 21 publications

Hypothetical High-Surface-Area Carbons with Exceptional Hydrogen Storage Capacities: Open Carbon Frameworks

Hypothetical High-Surface-Area Carbons with Exceptional Hydrogen Storage Capacities: Open Carbon Frameworks

Linking morphology and performance of organic solar cells based on decacyclene triimide acceptors

Optoelectronic property and sensing applications of crystalline nano/microwires of decacyclene

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