Vizuete, M.; Gómez-Escalonilla, MJ.; García-Rodríguez, S.; García Fierro, JL.; Atienzar Corvillo, PE.; García Gómez, H.; Langa, F. (2012). Photochemical Evidence of Electronic Interwall Communication in Double-Wall Carbon Nanotubes. Chemistry - A European Journal. 18(52):16922-16930. doi:10.1002/chem.201202000
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/33459
Title:
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Photochemical Evidence of Electronic Interwall Communication in Double-Wall Carbon Nanotubes
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Author:
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Vizuete, María
Gómez-Escalonilla, María J.
García-Rodríguez, Sergio
García Fierro, José Luis
Atienzar Corvillo, Pedro Enrique
García Gómez, Hermenegildo
Langa, Fernando
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UPV Unit:
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Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química
Universitat Politècnica de València. Departamento de Química - Departament de Química
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Issued date:
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Abstract:
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Single- and double-wall carbon nanotubes (CNTs) having dimethylanilino (DMA) units covalently attached to the external graphene wall have been prepared by the reaction of the dimethylaminophenylnitronium ion with the ...[+]
Single- and double-wall carbon nanotubes (CNTs) having dimethylanilino (DMA) units covalently attached to the external graphene wall have been prepared by the reaction of the dimethylaminophenylnitronium ion with the corresponding CNT. The samples have been characterized by Raman and XPS spectroscopies, thermogravimetry, and high-resolution transmission electron microscopy in which the integrity of the single or double wall of the CNT and the percentage of substitution (one dimethylanilino group every 45 carbons of the wall for the single- and double-wall samples) has been determined. Nanosecond laser flash photolysis has shown the generation of transients that has been derived from the charge transfer between the dimethylanilino (as the electron donor) to the CNT graphene wall (as the electron acceptor). Importantly, the lifetime of the double-wall CNT is much shorter than that monitored for the single-wall CNT. Shorter-lived transients were also observed for the pentyl-esterified functionalized double-wall CNT with respect to the single-wall analogue in the presence of hole (CH3OH) and electron quenchers (O2, N2O), which has led to the conclusion that the inner, intact graphene wall that is present in double-wall CNT increases the charge mobility significantly, favoring charge recombination processes. Considering the importance that charge mobility has in microelectronics, our finding suggests that double-wall CNT or two-layer graphene may be more appropriate to develop devices needing fast charge mobility.
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Subjects:
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Carbon
,
Covalent chemistry
,
Electron transfer
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Graphene
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Nanotubes
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Copyrigths:
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Cerrado |
Source:
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Chemistry - A European Journal. (issn:
0947-6539
)
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DOI:
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10.1002/chem.201202000
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Publisher:
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Wiley-VCH Verlag
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Publisher version:
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http://dx.doi.org/10.1002/chem.201202000
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Project ID:
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Ministry of Science and Innovation of Spain [CTQ2010-17498, PLE2009-0038, CSD2007-00007]
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Thanks:
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Financial support from the Ministry of Science and Innovation of Spain, (CTQ2010-17498, PLE2009-0038 and Consolider-Ingenio Projects HOPE CSD2007-00007 and MULTICAT) is gratefully acknowledged. P. A. also thanks the Spanish ...[+]
Financial support from the Ministry of Science and Innovation of Spain, (CTQ2010-17498, PLE2009-0038 and Consolider-Ingenio Projects HOPE CSD2007-00007 and MULTICAT) is gratefully acknowledged. P. A. also thanks the Spanish Ministry of Science and Innovation for a Juan de la Cierva research associate contract. We thank to Maria Jose de la Mata for the TGA experiments.
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Type:
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Artículo
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