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Horoszko CP, Jena PV, Roxbury D, Rotkin SV, Heller DA. Optical Voltammetry of Polymer-Encapsulated Single-Walled Carbon Nanotubes. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2019; 123:24200-24208. [PMID: 32690989 PMCID: PMC7371339 DOI: 10.1021/acs.jpcc.9b07626] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The semiconducting single-walled carbon nanotube (SWCNT), noncovalently wrapped by a polymeric monolayer, is a nanoscale semiconductor-electrolyte interface under investigation for sensing, photonics, and photovoltaic applications. SWCNT complexes are routinely observed to sensitize various electrochemical/redox phenomena, even in the absence of an external field. While the photoluminescence response to gate voltage depends on the redox potential of the nanotube, analogous optical voltammetry of functionalized carbon nanotubes could be conducted in suspension without applying voltage but by varying the solution conditions as well as the chemistry of the encapsulating polymer. Steady-state photoluminescence, absorbance, and in situ measurements of O2/H2O reactivity show correlation with the pH/pK a-dependent reactivity of π-rich coatings. The nanotube emission responses suggest that the presence of photogenerated potential may explain the observed coating electrochemical reactivity. This work finds that electronic and chemical interactions of the nanotube with the encapsulating polymer may play a critical role in applications that depend on radiative recombination, such as optical sensing.
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Affiliation(s)
- Christopher P. Horoszko
- Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
- Weill Graduate School of Medical Sciences, Cornell University, New York, New York 10065, United States
| | - Prakrit V. Jena
- Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Daniel Roxbury
- Department of Chemical Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Slava V. Rotkin
- Materials Research Institute and Department of Engineering Science and Mechanics, Pennsylvania State University, Millennium Science Complex, University Park, Pennsylvania 16802, United States
| | - Daniel A. Heller
- Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
- Weill Cornell Medicine, Cornell University, New York, New York 10065, United States
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Damasceno JPV, Zarbin AJG. A new approach for the achievement of stable aqueous dispersions of carbon nanotubes. Chem Commun (Camb) 2019; 55:5809-5812. [DOI: 10.1039/c9cc01541h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple and innovative way to achieve highly stable aqueous dispersions of both multi- and single-walled carbon nanotubes is reported.
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Affiliation(s)
- João Paulo V. Damasceno
- Department of Chemistry
- Federal University of Paraná (UFPR)
- Centro Politécnico
- CP 19032
- Curitiba
| | - Aldo J. G. Zarbin
- Department of Chemistry
- Federal University of Paraná (UFPR)
- Centro Politécnico
- CP 19032
- Curitiba
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Hong L, Nakashima N, Li Y, Jia H, Yang C. Surfactant-Dependent Charge Transfer between Polyoxometalates and Single-Walled Carbon Nanotubes: A Fluorescence Spectroscopic Study. Chem Asian J 2017; 13:210-216. [PMID: 29226629 DOI: 10.1002/asia.201701558] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Revised: 12/05/2017] [Indexed: 11/07/2022]
Abstract
Hybridizations of redox-active polyoxometalates (POMs) with single-walled carbon nanotubes (SWNTs) have been widely investigated for their diverse applications. For the purpose of constructing high-quality electronic devices, controlling charge transfer within POM/SWNT hybrids is an inevitable issue. As determined by means of fluorescence spectroscopy, electron transfer between SWNTs and a common POM dopant, phosphomolybdic acid (PMo12 ), can be tuned simply by an alteration of nanotube surfactant type from anionic to nonionic. The mechanism is attributed to the influence of surfactant type on the stabilization of the electron donor-acceptor hybrid and effect of surfactant-nanotube interactions. These results will be important to control charge-transport behavior in nanohybrids consisting of carbon nanotubes.
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Affiliation(s)
- Liu Hong
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, P.R. China
- Jiangsu SINOJIT Wind Energy Technology Co., Ltd, 8 Naxiang Road, Yunting Street, Jiangyin, 214422, P.R. China
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Naotoshi Nakashima
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
- World Premier International (WPI) Research Center, International Institute for Carbon-Neutral Energy Research (I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Yunxing Li
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, P.R. China
| | - Hongbing Jia
- Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, 200 Xiaolingwei, Nanjing, 210094, P.R. China
| | - Cheng Yang
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, P.R. China
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Hartleb H, Späth F, Hertel T. Evidence for Strong Electronic Correlations in the Spectra of Gate-Doped Single-Wall Carbon Nanotubes. ACS NANO 2015; 9:10461-70. [PMID: 26381021 DOI: 10.1021/acsnano.5b04707] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
We have investigated the photophysical properties of electrochemically gate-doped semiconducting single-wall carbon nanotubes (s-SWNTs). A comparison of photoluminescence (PL) and simultaneously recorded absorption spectra reveals that free-carrier densities correlate well with the first sub-band exciton or trion oscillator strengths but not with PL intensities. We thus used a global analysis of the first sub-band exciton absorption for a detailed investigation of gate-doping, here of the (6,5) SWNT valence band. Our data are consistent with a doping-induced valence band shift according to Δϵv = n × b, where n is the free-carrier density, ϵv is the valence band edge, and b = 0.15 ± 0.05 eV·nm. We also predict such band gap renormalization of one-dimensional gate-doped semiconductors to be accompanied by a stepwise increase of the carrier density by Δn = (32meffb)/(πℏ)(2) (meff is effective carrier mass). Moreover, we show that the width of the spectroelectrochemical window of the first sub-band exciton of 1.55 ± 0.05 eV corresponds to the fundamental band gap of the undoped (6,5) SWNTs in our samples and not to the renormalized band gap of the doped system. These observations as well as a previously unidentified absorption band emerging at high doping levels in the Pauli-blocked region of the single-particle Hartree band structure provide clear evidence for strong electronic correlations in the optical spectra of SWNTs.
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Affiliation(s)
- Holger Hartleb
- Institute of Physical and Theoretical Chemistry, Faculty of Chemistry and Pharmacy, and ‡Röntgen Research Center for Complex Material Systems, Julius-Maximilian University Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Florian Späth
- Institute of Physical and Theoretical Chemistry, Faculty of Chemistry and Pharmacy, and ‡Röntgen Research Center for Complex Material Systems, Julius-Maximilian University Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Tobias Hertel
- Institute of Physical and Theoretical Chemistry, Faculty of Chemistry and Pharmacy, and ‡Röntgen Research Center for Complex Material Systems, Julius-Maximilian University Würzburg , Am Hubland, 97074 Würzburg, Germany
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In Situ Photoluminescence Spectroelectrochemistry for Determination of Electronic States of Single-Walled Carbon Nanotubes. E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY 2015. [DOI: 10.1380/ejssnt.2015.179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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