Clusterization, Electrophoretic Deposition, and Photoelectrochemical Properties of Fullerene‐Functionalized Carbon Nanotube Composites

Umeyama, Tomokazu; Tezuka, Noriyasu; Fujita, Misao; Hayashi, Shinya; Kadota, Naoki; Matano, Yoshihiro; Imahori, Hiroshi

doi:10.1002/chem.200702053

Cited by 57 publications

(127 citation statements)

References 130 publications

(53 reference statements)

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“…[25][26][27][28] However, covalent sidewall chemical functionalization is known to disrupt the conjugated π-systems of CNT and in turn deterioration of their unique electronic properties. 6 C 60 fullerenes on a flat metal crystal surface are known to form a Van der Waals (VdW)…”

Section: Introductionmentioning

confidence: 99%

Bucky-corn: van der Waals composite of carbon nanotube coated by fullerenes

et al. 2015

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Can C60 layer cover a surface of single-wall carbon nanotube (SWCNT) forming an exohedral pure-carbon hybrid with only VdW interactions? The paper addresses this question and demonstrates that the fullerene shell layer in such a bucky-corn structure can be stable.Theoretical study of structure, stability and electronic properties of the following bucky-corn hybrids is reported: C 60 and C 70 molecules on an individual SWCNT, C 60 dimers on an individual SWCNT as well C 60 molecules on SWNT bundles. The geometry and total energies of the bucky-corns were calculated by the molecular dynamics method while the density functional theory method was used to simulate the electronic band structures. TOC GRAPHICS

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Section: Introductionmentioning

confidence: 99%

Bucky-corn: van der Waals composite of carbon nanotube coated by fullerenes

et al. 2015

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“…17 The extraordinary electron acceptor properties have resulted in noteworthy advances in the research areas of light-induced electron transfer and solar energy conversion. [18][19][20][21] Therefore, the hybridization of C 60 with SWCNTs 5,7,[22][23][24][25][26][27] would couple the optical and electronic properties of SWCNTs together with the electron-acceptor feature of C 60 . Covalent modification is one of the strategies for the attachment of C 60 onto sidewall of SWCNT.…”

mentioning

confidence: 99%

Assembly of carbon nanotubes and alkylated fullerenes: nanocarbon hybrid towards photovoltaic applications

et al. 2011

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Taking advantage of the non-covalent interaction between alkyl chains and the sidewalls of a singlewalled carbon nanotube (SWCNT), a nanocarbon hybrid of SWCNT and a fullerene (C 60 ) derivative with long alkyl chains was constructed as a donor-acceptor pair for photovoltaics and nanodevice investigations. It was found that SWCNT could be mostly unbundled by the alkylated C 60 (1) and was well-dispersed in organic solvents. As a photoactive material, the resultant nanocarbon hybrid, 1-SWCNT, performed well in light-energy harvesting applications in photoelectrochemical cells and nanoscale field-effect transistors (FET). Moreover, the 1-SWCNT assembly exhibited superhydrophobicity, providing an interesting opportunity to fabricate nanocarbon-based waterproof optoelectronic devices. In order to understand the photoexcitation process, the 1-SWCNT assembly was electrochemically and spectroscopically characterized. The electrochemical results showed that the SWCNT facilitated electronic communication between 1 and the electrode. The steady-state and timeresolved fluorescence and the photoluminescence excitation studies suggested efficient quenching of the singlet excited state of C 60 . Nanosecond transient absorption data revealed the one-electron reduction of fullerene, C 60 _ À , thereby demonstrating the photoinduced electron transfer from SWCNT to the C 60 unit in the 1-SWCNT assembly.

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“…109 The hierarchical film structure in the order of clusters I, II, and III on the SnO 2 surface was formed due to the difference in mobilities of the clusters during the electrophoretic deposition. The composite film exhibited the IPCE value as high as 18% at 400 nm under an applied potential of 0.05 V vs SCE.…”

Section: Fullerene-carbon Nanotube Compositesmentioning

confidence: 99%

Donor−Acceptor Nanoarchitecture on Semiconducting Electrodes for Solar Energy Conversion

2009

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Donor-acceptor molecules have been fabricated on a nanostructured semiconducting electrode for solar energy conversion (i.e., dye-sensitized bulk heterojunction solar cell). The device structure is similar to that of dyesensitized solar cells, but the top surface of the nanostructured semiconducting electrode is covered with donor-acceptor multilayers. Thus, initial charge separation takes place at the blend interface of the donor-acceptor, which is a typical characteristic of bulk heterojunction solar cells, whereas subsequent processes resemble those in dye-sensitized solar cells. In this novel solar cell, donor-nanocarbons (i.e., fullerenes and carbon nanotubes) have been successfully deposited electrophoretically or spin-coated onto nanostructured SnO 2 and TiO 2 electrodes that exhibit efficient photocurrent generation. The bottom-up self-organization of porphyrin and fullerene molecules onto the nanostructured electrodes has led to moderate cell performance with an incident photon-to-current efficiency of up to ∼60% and a power conversion efficiency of 1-2%. Importance of donor-acceptor nanoarchitecture on the nanostructured semiconducting electrodes is highlighted in terms of self-assembly of donor-acceptor molecules.

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Clusterization, Electrophoretic Deposition, and Photoelectrochemical Properties of Fullerene‐Functionalized Carbon Nanotube Composites

Cited by 57 publications

References 130 publications

Bucky-corn: van der Waals composite of carbon nanotube coated by fullerenes

Bucky-corn: van der Waals composite of carbon nanotube coated by fullerenes

Assembly of carbon nanotubes and alkylated fullerenes: nanocarbon hybrid towards photovoltaic applications

Donor−Acceptor Nanoarchitecture on Semiconducting Electrodes for Solar Energy Conversion

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