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Mu S, Lin Q, Ma D, Liu T. WITHDRAWN: PEI-functionalized graphene oxide for hydrophobic drug and gene delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014. [DOI: 10.1016/j.msec.2014.01.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Oelsner C, Herrero MA, Ehli C, Prato M, Guldi DM. Charge Transfer Events in Semiconducting Single-Wall Carbon Nanotubes. J Am Chem Soc 2011; 133:18696-706. [DOI: 10.1021/ja205084x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christian Oelsner
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - M. Antonia Herrero
- Departamento de Química Orgánica − IRICA, Facultad de Química, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
| | - Christian Ehli
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Maurizio Prato
- Dipartimento di Scienze Farmaceutiche & Center of Excellence for Nanostructured Materials, Università degli Studi di Trieste, Piazzale Europa 1, 34127 Trieste, Italy
| | - Dirk M. Guldi
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
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Kahnt A, Kärnbratt J, Esdaile LJ, Hutin M, Sawada K, Anderson HL, Albinsson B. Temperature dependence of charge separation and recombination in porphyrin oligomer-fullerene donor-acceptor systems. J Am Chem Soc 2011; 133:9863-71. [PMID: 21595470 PMCID: PMC3119959 DOI: 10.1021/ja2019367] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Indexed: 01/12/2023]
Abstract
Electron-transfer reactions are fundamental to many practical devices, but because of their complexity, it is often very difficult to interpret measurements done on the complete device. Therefore, studies of model systems are crucial. Here the rates of charge separation and recombination in donor-acceptor systems consisting of a series of butadiyne-linked porphyrin oligomers (n = 1-4, 6) appended to C(60) were investigated. At room temperature, excitation of the porphyrin oligomer led to fast (5-25 ps) electron transfer to C(60) followed by slower (200-650 ps) recombination. The temperature dependence of the charge-separation reaction revealed a complex process for the longer oligomers, in which a combination of (i) direct charge separation and (ii) migration of excitation energy along the oligomer followed by charge separation explained the observed fluorescence decay kinetics. The energy migration is controlled by the temperature-dependent conformational dynamics of the longer oligomers and thereby limits the quantum yield for charge separation. Charge recombination was also studied as a function of temperature through measurements of femtosecond transient absorption. The temperature dependence of the electron-transfer reactions could be successfully modeled using the Marcus equation through optimization of the electronic coupling (V) and the reorganization energy (λ). For the charge-separation rate, all of the donor-acceptor systems could be successfully described by a common electronic coupling, supporting a model in which energy migration is followed by charge separation. In this respect, the C(60)-appended porphyrin oligomers are suitable model systems for practical charge-separation devices such as bulk-heterojunction solar cells, where conformational disorder strongly influences the electron-transfer reactions and performance of the device.
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Affiliation(s)
- Axel Kahnt
- Physical Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 3, 412 96 Göteborg, Sweden
| | - Joakim Kärnbratt
- Physical Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 3, 412 96 Göteborg, Sweden
| | - Louisa J. Esdaile
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Marie Hutin
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Katsutoshi Sawada
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Harry L. Anderson
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Bo Albinsson
- Physical Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 3, 412 96 Göteborg, Sweden
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Guo CX, Zheng XT, Ng SR, Lai Y, Lei Y, Li CM. In situ molecular detection of ischemic cells by enhanced protein direct electron transfer on a unique horseradish peroxidase–Au nanoparticles–polyaniline nanowires biofilm. Chem Commun (Camb) 2011; 47:2652-4. [DOI: 10.1039/c0cc04542j] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Kavan L, Dunsch L. Spectroelectrochemistry of carbon nanotubes. Chemphyschem 2010; 12:47-55. [PMID: 21226179 DOI: 10.1002/cphc.201000882] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2010] [Indexed: 11/10/2022]
Abstract
This Minireview is a critical survey of results accumulated during the last decade on the characterization of carbon nanotubes using a combination of electrochemical and spectroscopic methods. The article updates earlier reviews on the topic with special emphasis to recent progress in the field.
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Affiliation(s)
- Ladislav Kavan
- J. Heyrovský Institute of Physical Chemistry, v.v.i. Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic.
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Gutiérrez F, Ortega G, Cabrera JL, Rubianes MD, Rivas GA. Quantification of Quercetin Using Glassy Carbon Electrodes Modified with Multiwalled Carbon Nanotubes Dispersed in Polyethylenimine and Polyacrylic Acid. ELECTROANAL 2010. [DOI: 10.1002/elan.201000291] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Goff AL, Moggia F, Debou N, Jegou P, Artero V, Fontecave M, Jousselme B, Palacin S. Facile and tunable functionalization of carbon nanotube electrodes with ferrocene by covalent coupling and π-stacking interactions and their relevance to glucose bio-sensing. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2010.01.014] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Gebhardt B, Graupner R, Hauke F, Hirsch A. A Novel Diameter-Selective Functionalization of SWCNTs with Lithium Alkynylides. European J Org Chem 2010. [DOI: 10.1002/ejoc.200900848] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Kong L, Wang J, Luo T, Meng F, Chen X, Li M, Liu J. Novel pyrenehexafluoroisopropanol derivative-decorated single-walled carbon nanotubes for detection of nerve agents by strong hydrogen-bonding interaction. Analyst 2010; 135:368-74. [DOI: 10.1039/b920266h] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Lorençon E, Ferlauto AS, de Oliveira S, Miquita DR, Resende RR, Lacerda RG, Ladeira LO. Direct production of carbon nanotubes/metal nanoparticles hybrids from a redox reaction between metal ions and reduced carbon nanotubes. ACS APPLIED MATERIALS & INTERFACES 2009; 1:2104-2106. [PMID: 20355840 DOI: 10.1021/am900424m] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A method to decorate single-walled and multiwalled carbon nanotubes (CNTs) with metal nanoparticles (NPs) based on the formation of a CNT polyelectrolyte is reported. Such a method does not rely on CNT surface functionalization or the use of surfactants. It has been tested for gold (Au) and palladium (Pd). The resulting hybrids present metal NPs highly dispersed along the tube walls and with small size dispersion. The average diameters of the Au and Pd NPs were approximately 5 and approximately 3 nm, respectively. This method paves the way for large-scale decoration of CNTs with metal NPs.
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Ahmad A, Kurkina T, Kern K, Balasubramanian K. Applications of the Static Quenching of Rhodamine B by Carbon Nanotubes. Chemphyschem 2009; 10:2251-5. [DOI: 10.1002/cphc.200900246] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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