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Luo Y, Wu N, Niu L, Hao P, Sun X, Chen F, Zhao Y. Ionic Strength-Mediated "DNA Corona Defects" for Efficient Arrangement of Single-Walled Carbon Nanotubes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2308532. [PMID: 38233163 PMCID: PMC11022692 DOI: 10.1002/advs.202308532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 12/25/2023] [Indexed: 01/19/2024]
Abstract
Single-stranded DNA oligonucleotides wrapping on the surface of single-walled carbon nanotubes (SWCNTs), described as DNA corona, are often used as a dispersing agent for SWCNTs. The uneven distribution of DNA corona along SWCNTs is related to the photoelectric properties and the surface activity of SWCNTs. An ionic strength-mediated "DNA corona defects" (DCDs) strategy is proposed to acquire an exposed surface of SWCNTs (accessible surface) as large as possible while maintaining good dispersibility via modulating the conformation of DNA corona. By adjusting the solution ionic strength, the DNA corona phase transitioned from an even-distributed and loose conformation to a locally compact conformation. The resulting enlarged exposed surface of SWCNTs is called DCDs, which provide active sites for molecular adsorption. This strategy is applied for the arrangement of SWCNTs on DNA origami. SWCNTs with ≈11 nm DCD, providing enough space for the adsorption of "capture ssDNA" (≈7 nm width required for 24-nt) extended from DNA origami structures are fabricated. The DCD strategy has potential applications in SWCNT-based optoelectronic devices.
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Affiliation(s)
- Yuanyuan Luo
- Institute of Analytical Chemistry and Instrument for Life ScienceThe Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi'an Jiaotong UniversityXianning West RoadXi'anShaanxi710049China
| | - Na Wu
- Institute of Analytical Chemistry and Instrument for Life ScienceThe Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi'an Jiaotong UniversityXianning West RoadXi'anShaanxi710049China
| | - Liqiong Niu
- Institute of Analytical Chemistry and Instrument for Life ScienceThe Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi'an Jiaotong UniversityXianning West RoadXi'anShaanxi710049China
| | - Pengyan Hao
- Institute of Analytical Chemistry and Instrument for Life ScienceThe Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi'an Jiaotong UniversityXianning West RoadXi'anShaanxi710049China
| | - Xiaoya Sun
- Institute of Analytical Chemistry and Instrument for Life ScienceThe Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi'an Jiaotong UniversityXianning West RoadXi'anShaanxi710049China
| | - Feng Chen
- Institute of Analytical Chemistry and Instrument for Life ScienceThe Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi'an Jiaotong UniversityXianning West RoadXi'anShaanxi710049China
| | - Yongxi Zhao
- Institute of Analytical Chemistry and Instrument for Life ScienceThe Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi'an Jiaotong UniversityXianning West RoadXi'anShaanxi710049China
- Frontier Institute of Science and TechnologyXi'an Jiaotong UniversityXi'anShaanxi710049China
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2
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Birkmeier K, Hertel T, Hartschuh A. Probing the ultrafast dynamics of excitons in single semiconducting carbon nanotubes. Nat Commun 2022; 13:6290. [PMID: 36271091 PMCID: PMC9586955 DOI: 10.1038/s41467-022-33941-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 10/06/2022] [Indexed: 11/09/2022] Open
Abstract
Excitonic states govern the optical spectra of low-dimensional semiconductor nanomaterials and their dynamics are key for a wide range of applications, such as in solar energy harvesting and lighting. Semiconducting single-walled carbon nanotubes emerged as particularly rich model systems for one-dimensional nanomaterials and as such have been investigated intensively in the past. The exciton decay dynamics in nanotubes has been studied mainly by transient absorption and time-resolved photoluminescence spectroscopy. Since different transitions are monitored with these two techniques, developing a comprehensive model to reconcile different data sets, however, turned out to be a challenge and remarkably, a uniform description seems to remain elusive. In this work, we investigate the exciton decay dynamics in single carbon nanotubes using transient interferometric scattering and time-resolved photoluminescence microscopy with few-exciton detection sensitivity and formulate a unified microscopic model by combining unimolecular exciton decay and ultrafast exciton-exciton annihilation on a time-scale down to 200 fs.
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Affiliation(s)
- Konrad Birkmeier
- Department of Chemistry and CeNS, LMU Munich, Butenandtstr. 5-13, 81377, Munich, Germany
- TOPTICA Photonics AG, Lochhamer Schlag 19, 82166, Gräfelfing, Germany
| | - Tobias Hertel
- Institute of Physical and Theoretical Chemistry, Julius-Maximilian University Würzburg, 97074, Würzburg, Germany
| | - Achim Hartschuh
- Department of Chemistry and CeNS, LMU Munich, Butenandtstr. 5-13, 81377, Munich, Germany.
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3
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Ma X, Cambré S, Wenseleers W, Doorn SK, Htoon H. Quasiphase Transition in a Single File of Water Molecules Encapsulated in (6,5) Carbon Nanotubes Observed by Temperature-Dependent Photoluminescence Spectroscopy. PHYSICAL REVIEW LETTERS 2017; 118:027402. [PMID: 28128601 DOI: 10.1103/physrevlett.118.027402] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Indexed: 05/14/2023]
Abstract
Molecules confined inside single-walled carbon nanotubes (SWCNTs) behave quite differently from their bulk analogues. In this Letter we present temperature-dependent (4.2 K up to room temperature) photoluminescence (PL) spectra of water-filled and empty single-chirality (6,5) SWCNTs. Superimposed on a linear temperature-dependent PL spectral shift of the empty SWCNTs, an additional stepwise PL spectral shift of the water-filled SWCNTs is observed at ∼150 K. With the empty SWCNTs serving as an ideal reference system, we assign this shift to temperature-induced changes occurring in the single-file chain of water molecules encapsulated in the tubes. Our molecular dynamics simulations further support the occurrence of a quasiphase transition of the orientational order of the water dipoles in the single-file chain.
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Affiliation(s)
- Xuedan Ma
- Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, New Mexico 87545, USA
| | - Sofie Cambré
- Experimental Condensed Matter Physics Laboratory, University of Antwerp, B-2610 Antwerp, Belgium
| | - Wim Wenseleers
- Experimental Condensed Matter Physics Laboratory, University of Antwerp, B-2610 Antwerp, Belgium
| | - Stephen K Doorn
- Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, New Mexico 87545, USA
| | - Han Htoon
- Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, New Mexico 87545, USA
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4
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Nanayakkara SU, van de Lagemaat J, Luther JM. Scanning Probe Characterization of Heterostructured Colloidal Nanomaterials. Chem Rev 2015. [PMID: 26196958 DOI: 10.1021/cr500280t] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Sanjini U. Nanayakkara
- National Renewable Energy Laboratory, 15013 Denver
West Parkway, Golden, Colorado 80401, United States
| | - Jao van de Lagemaat
- National Renewable Energy Laboratory, 15013 Denver
West Parkway, Golden, Colorado 80401, United States
| | - Joseph M. Luther
- National Renewable Energy Laboratory, 15013 Denver
West Parkway, Golden, Colorado 80401, United States
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5
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Umemura K. Hybrids of Nucleic Acids and Carbon Nanotubes for Nanobiotechnology. NANOMATERIALS (BASEL, SWITZERLAND) 2015; 5:321-350. [PMID: 28347014 PMCID: PMC5312852 DOI: 10.3390/nano5010321] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 02/25/2015] [Accepted: 03/05/2015] [Indexed: 12/17/2022]
Abstract
Recent progress in the combination of nucleic acids and carbon nanotubes (CNTs) has been briefly reviewed here. Since discovering the hybridization phenomenon of DNA molecules and CNTs in 2003, a large amount of fundamental and applied research has been carried out. Among thousands of papers published since 2003, approximately 240 papers focused on biological applications were selected and categorized based on the types of nucleic acids used, but not the types of CNTs. This survey revealed that the hybridization phenomenon is strongly affected by various factors, such as DNA sequences, and for this reason, fundamental studies on the hybridization phenomenon are important. Additionally, many research groups have proposed numerous practical applications, such as nanobiosensors. The goal of this review is to provide perspective on biological applications using hybrids of nucleic acids and CNTs.
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Affiliation(s)
- Kazuo Umemura
- Biophysics Section, Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 1628601, Japan.
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6
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Lapin ZJ, Beams R, Cançado LG, Novotny L. Near-field Raman spectroscopy of nanocarbon materials. Faraday Discuss 2015; 184:193-206. [DOI: 10.1039/c5fd00050e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Nanocarbon materials, including sp2 hybridized two-dimensional graphene and one-dimensional carbon nanotubes, and sp1 hybridized one-dimensional carbyne, are being considered for the next generation of integrated optoelectronic devices. The strong electron–phonon coupling present in these nanocarbon materials makes Raman spectroscopy an ideal tool to study and characterize the material and device properties. Near-field Raman spectroscopy combines non-destructive chemical, electrical, and structural specificity with nanoscale spatial resolution, making it an ideal tool for studying nanocarbon systems. Here we use near-field Raman spectroscopy to study strain, defects, and doping in different nanocarbon systems.
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Affiliation(s)
| | - Ryan Beams
- Material Measurement Laboratory
- National Institute of Standards and Technology
- Gaithersburg
- USA
| | | | - Lukas Novotny
- Photonics Laboratory
- ETH Zürich
- 8093 Zürich
- Switzerland
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7
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Schäfer S, Cogan NMB, Krauss TD. Spectroscopic investigation of electrochemically charged individual (6,5) single-walled carbon nanotubes. NANO LETTERS 2014; 14:3138-3144. [PMID: 24797608 DOI: 10.1021/nl5003729] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Individual single-walled carbon nanotubes (SWNTs) of (6,5) chirality were investigated by means of optical spectroscopy while their charge state was controlled electrochemically. The photoluminescence of the SWNTs was found to be quenched at positive and negative potentials, where the onset and offset varied for each individual SWNT. We propose that differences in the local environment of the individual SWNT lead to a shift of the Fermi energy, resulting in a distribution of the oxidation and reduction potentials. The exciton emission energy was found to correlate with the oxidation and reduction potential. Further proof of a correlation was found by deliberately doping individual SWNTs and monitoring their photoluminescence spectral shift.
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Affiliation(s)
- Sebastian Schäfer
- Department of Chemistry and ‡Institute of Optics, University of Rochester , Rochester, New York 14627, United States
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8
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Abstract
Tip-enhanced near-field optical microscopy (TENOM) is a scanning probe technique capable of providing a broad range of spectroscopic information on single objects and structured surfaces at nanometer spatial resolution and with highest detection sensitivity. In this review, we first illustrate the physical principle of TENOM that utilizes the antenna function of a sharp probe to efficiently couple light to excitations on nanometer length scales. We then discuss the antenna-induced enhancement of different optical sample responses including Raman scattering, fluorescence, generation of photocurrent and electroluminescence. Different experimental realizations are presented and several recent examples that demonstrate the capabilities of the technique are reviewed.
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Affiliation(s)
- Nina Mauser
- Department Chemie & CeNS, LMU München, 81377 München, Germany.
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9
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Jorio A. Raman Spectroscopy in Graphene-Based Systems: Prototypes for Nanoscience and Nanometrology. ACTA ACUST UNITED AC 2012. [DOI: 10.5402/2012/234216] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Raman spectroscopy is a powerful tool to characterize the different types of sp2 carbon nanostructures, including two-dimensional graphene, one-dimensional nanotubes, and the effect of disorder in their structures. This work discusses why sp2 nanocarbons can be considered as prototype materials for the development of nanoscience and nanometrology. The sp2 nanocarbon structures are quickly introduced, followed by a discussion on how this field evolved in the past decades. In sequence, their rather rich Raman spectra composed of many peaks induced by single- and multiple-resonance effects are introduced. The properties of the main Raman peaks are then described, including their dependence on both materials structure and external factors, like temperature, pressure, doping, and environmental effects. Recent applications that are pushing the technique limits, such as multitechnique approach and in situ nanomanipulation, are highlighted, ending with some challenges for new developments in this field.
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Affiliation(s)
- Ado Jorio
- Departamento de Física, Universidade Federal de Minas Gerais, 30123-970 Belo Horizonte, MG, Brazil
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10
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Jorio A, Cançado LG. Perspectives on Raman spectroscopy of graphene-based systems: from the perfect two-dimensional surface to charcoal. Phys Chem Chem Phys 2012; 14:15246-56. [DOI: 10.1039/c2cp42621h] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Fagan JA, Huh JY, Simpson JR, Blackburn JL, Holt JM, Larsen BA, Walker ARH. Separation of empty and water-filled single-wall carbon nanotubes. ACS NANO 2011; 5:3943-53. [PMID: 21480636 DOI: 10.1021/nn200458t] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The separation of empty and water-filled laser ablation and electric arc synthesized nanotubes is reported. Centrifugation of these large-diameter nanotubes dispersed with sodium deoxycholate using specific conditions produces isolated bands of empty and water-filled nanotubes without significant diameter selection. This separation is shown to be consistent across multiple nanotube populations dispersed from different source soots. Detailed spectroscopic characterization of the resulting empty and filled fractions reveals that water filling leads to systematic changes to the optical and vibrational properties. Furthermore, sequential separation of the resolved fractions using cosurfactants and density gradient ultracentrifugation reveals that water filling strongly influences the optimal conditions for metallic and semiconducting separation.
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Affiliation(s)
- Jeffrey A Fagan
- Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States.
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12
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Green AA, Hersam MC. Properties and application of double-walled carbon nanotubes sorted by outer-wall electronic type. ACS NANO 2011; 5:1459-1467. [PMID: 21280609 DOI: 10.1021/nn103263b] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Double-walled carbon nanotubes (DWNTs) can adopt four distinct permutations arising from the electronic type (metallic or semiconducting) of their inner and outer walls. This polydispersity limits the utility of DWNTs in applications such as thin film electronics. We demonstrate that density gradient ultracentrifugation can be employed to address this source of heterogeneity by producing DWNTs with well-defined outer-wall electronic types. Optical absorption measurements of sorted DWNTs reveal outer-wall purities of 96% and 98% for sorted semiconducting and metallic samples, respectively. Electrical characterization of semiconducting and metallic outer-wall DWNTs in thin film transistors directly confirms the efficacy of these separations, with semiconducting DWNT devices yielding on/off ratios 2 orders of magnitude higher than comparable metallic DWNT devices.
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Affiliation(s)
- Alexander A Green
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208-3108, USA
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13
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Numata M, Shinkai S. 'Supramolecular wrapping chemistry' by helix-forming polysaccharides: a powerful strategy for generating diverse polymeric nano-architectures. Chem Commun (Camb) 2011; 47:1961-75. [PMID: 21246150 DOI: 10.1039/c0cc03133j] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We have exploited novel supramolecular wrapping techniques by helix-forming polysaccharides, β-1,3-glucans, which have strong tendency to form regular helical structures on versatile nanomaterials in an induced-fit manner. This approach is totally different from that using the conventional interpolymer interactions seen in both natural and synthetic polymeric architectures, and therefore has potential to create novel polymeric architectures with diverse and unexpected functionalities. The wrapping by β-1,3-glucans enforces the entrapped guest polymer to adopt helical or twisted conformations through the convergent interpolymer interactions. On the contrary, the wrapping by chemically modified semi-artificial β-1,3-glucans can bestow the divergent self-assembling abilities on the entrapped guest polymer to create hierarchical polymeric architectures, where the polymer/β-1,3-glucan composite acts as a huge one-dimensional building block. Based on the established wrapping strategy, we have further extended the wrapping techniques toward the creation of three-dimensional polymeric architectures, in which the polymer/β-1,3-glucan composite behaves as a sort of amphiphilic block copolymers. The present wrapping system would open several paths to accelerate the development of the polymeric supramolecular assembly systems, giving the strong stimuli to the frontier of polysaccharide-based functional chemistry.
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Affiliation(s)
- Munenori Numata
- Graduate School of Life and Environmental Science, Kyoto Prefectural University, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan
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14
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Georgi C, Green AA, Hersam MC, Hartschuh A. Probing exciton localization in single-walled carbon nanotubes using high-resolution near-field microscopy. ACS NANO 2010; 4:5914-20. [PMID: 20857945 DOI: 10.1021/nn101443d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
We observe localization of excitons in semiconducting single-walled carbon nanotubes at room temperature using high-resolution near-field photoluminescence (PL) microscopy. Localization is the result of spatially confined exciton energy minima with depths of more than 15 meV connected to lateral energy gradients exceeding 2 meV/nm as evidenced by energy-resolved PL imaging. Simulations of exciton diffusion in the presence of energy variations support this interpretation predicting strongly enhanced PL at local energy minima.
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Affiliation(s)
- Carsten Georgi
- Department Chemie and CeNS, Ludwig-Maximilians-Universität München, 81377 München, Germany
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15
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Yamamoto Y, Fujigaya T, Niidome Y, Nakashima N. Fundamental properties of oligo double-stranded DNA/single-walled carbon nanotube nanobiohybrids. NANOSCALE 2010; 2:1767-1772. [PMID: 20820708 DOI: 10.1039/c0nr00145g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Fundamental properties of single-walled carbon nanotubes (SWNTs) that are individually dissolved using twenty base paired-double-stranded (ds) DNA, (dA)(20)/(dT)(20), as well as single-stranded (ss) twenty-mers of oligo DNAs, adenine (dA)(20) and thymine (dT)(20), for comparison are described. In this study, unbound oligo DNAs are fully removed from the hybrid aqueous solutions using size-exclusion chromatography (SEC)-HPLC. Each SEC chromatogram of the solutions shows two separated peaks; one is the free oligo DNAs and the others are the oligo DNA/SWNT hybrids. The earlier eluent fractions (the hybrids) are separated into four size-separated fractions, and then their stability is evaluated by the re-injection of the fractions. The chromatograms of the earlier eluent fractions are almost identical to those of the original ones even after storage for one month, indicating the high stability of the dsDNA/SWNTs and ssDNA/SWNTs hybrids in water. The results free us from considering the desorption of the bound-oligo dsDNA or oligo ssDNA from their nanohybrids with the SWNTs, which is of significant advantage to the utilization of oligo DNA/SWNT nanobiohybrids in wide areas of science. We also investigated the near-IR absorption and photoluminescence (PL) spectral behaviors of the fractionated oligo DNA/SWNTs hybrids not containing corresponding free oligo DNA.
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Affiliation(s)
- Yuki Yamamoto
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, Motooka, Fukuoka, Japan
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16
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Böhmler M, Hartmann N, Georgi C, Hennrich F, Green AA, Hersam MC, Hartschuh A. Enhancing and redirecting carbon nanotube photoluminescence by an optical antenna. OPTICS EXPRESS 2010; 18:16443-16451. [PMID: 20721031 DOI: 10.1364/oe.18.016443] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We observe the angular radiation pattern of single carbon nanotubes' photoluminescence in the back focal plane of a microscope objective and show that the emitting nanotube can be described by a single in-plane point dipole. The near-field interaction between a nanotube and an optical antenna modifies the radiation pattern that is now dominated by the antenna characteristics. We quantify the antenna induced excitation and radiation enhancement and show that the radiative rate enhancement is connected to a directional redistribution of the emission.
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Affiliation(s)
- Miriam Böhmler
- Department Chemie and CeNS, Ludwig-Maximilians-Universität München, 81377 München, Germany
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17
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Rotkin SV. Electronic Properties of Nonideal Nanotube Materials: Helical Symmetry Breaking in DNA Hybrids. Annu Rev Phys Chem 2010; 61:241-61. [DOI: 10.1146/annurev.physchem.012809.103304] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Slava V. Rotkin
- Physics Department and Center for Advanced Materials and Nanotechnology, Lehigh University, Bethlehem, Pennsylvania 18015;
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18
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Silvera-Batista CA, Weinberg P, Butler JE, Ziegler KJ. Long-Term Improvements to Photoluminescence and Dispersion Stability by Flowing SDS-SWNT Suspensions through Microfluidic Channels. J Am Chem Soc 2009; 131:12721-8. [DOI: 10.1021/ja903705k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Carlos A. Silvera-Batista
- Department of Chemical Engineering, Department of Materials Science and Engineering, and Center for Surface Science and Engineering, University of Florida, Gainesville, Florida 32611
| | - Philip Weinberg
- Department of Chemical Engineering, Department of Materials Science and Engineering, and Center for Surface Science and Engineering, University of Florida, Gainesville, Florida 32611
| | - Jason E. Butler
- Department of Chemical Engineering, Department of Materials Science and Engineering, and Center for Surface Science and Engineering, University of Florida, Gainesville, Florida 32611
| | - Kirk J. Ziegler
- Department of Chemical Engineering, Department of Materials Science and Engineering, and Center for Surface Science and Engineering, University of Florida, Gainesville, Florida 32611
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19
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Hartschuh A, Qian H, Georgi C, Böhmler M, Novotny L. Tip-enhanced near-field optical microscopy of carbon nanotubes. Anal Bioanal Chem 2009; 394:1787-95. [PMID: 19455312 DOI: 10.1007/s00216-009-2827-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2009] [Revised: 04/24/2009] [Accepted: 04/27/2009] [Indexed: 10/20/2022]
Abstract
We review recent experimental studies on single-walled carbon nanotubes on substrates using tip-enhanced near-field optical microscopy (TENOM). High-resolution optical and topographic imaging with sub 15 nm spatial resolution is shown to provide novel insights into the spectroscopic properties of these nanoscale materials. In the case of semiconducting nanotubes, the simultaneous observation of Raman scattering and photoluminescence (PL) is possible, enabling a direct correlation between vibrational and electronic properties on the nanoscale. So far, applications of TENOM have focused on the spectroscopy of localized phonon modes, local band energy renormalizations induced by charge carrier doping, the environmental sensitivity of nanotube PL, and inter-nanotube energy transfer. At the end of this review we discuss the remaining limitations and challenges in this field.
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Affiliation(s)
- A Hartschuh
- Chemistry and Biochemistry Department and CeNS, Ludwig Maximillians University Munich, 81377, Munich, Germany.
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20
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Yang QH, Wang Q, Gale N, Oton CJ, Cui L, Nandhakumar IS, Zhu Z, Tang Z, Brown T, Loh WH. Loosening the DNA wrapping around single-walled carbon nanotubes by increasing the strand length. NANOTECHNOLOGY 2009; 20:195603. [PMID: 19420642 DOI: 10.1088/0957-4484/20/19/195603] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this study, we discuss the influence of DNA strand length on DNA wrapping of single-walled carbon nanotubes under high-shear sonication and find that different strand length results in changed DNA-nanotube interaction, which is sensitively probed by the upshift extent of the Raman radial breathing mode bands of nanotubes due to DNA wrapping. The difference in the interaction between nanotubes and DNA strands of various length results in apparently different degrees of wrapping compactness, revealed by atomic force microscopy observations, and nanotube selectivity in wrapping, indicated by both Raman and photoluminescence spectroscopy results. The above findings can be utilized to precisely control the nanotube diameter distribution and modulate the physicochemical properties of the nanotube wrapped by DNA without any direct functionalization of nanotubes. This finding is of considerable interest from both theoretical and practical standpoints.
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Affiliation(s)
- Quan-Hong Yang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, People's Republic of China
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21
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Harutyunyan H, Gokus T, Green AA, Hersam MC, Allegrini M, Hartschuh A. Defect-induced photoluminescence from dark excitonic states in individual single-walled carbon nanotubes. NANO LETTERS 2009; 9:2010-2014. [PMID: 19331347 DOI: 10.1021/nl9002798] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We show that new low-energy photoluminescence (PL) bands can be created in the spectra of semiconducting single-walled carbon nanotubes by intense pulsed excitation. The new bands are attributed to PL from different nominally dark excitons that are "brightened" because of a defect-induced mixing of states with different parity and/or spin. Time-resolved PL studies on single nanotubes reveal a significant reduction of the bright exciton lifetime upon brightening of the dark excitons. The lowest-energy dark state has longer lifetimes and is not in thermal equilibrium with the bright state.
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Affiliation(s)
- Hayk Harutyunyan
- Dipartimento di Fisica E. Fermi, Università di Pisa and CNISM, Largo Pontecorvo 3, 56127 Pisa, Italy.
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Cha M, Jung S, Cha MH, Kim G, Ihm J, Lee J. Reversible metal-semiconductor transition of ssDNA-decorated single-walled carbon nanotubes. NANO LETTERS 2009; 9:1345-1349. [PMID: 19256471 DOI: 10.1021/nl8029948] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A field effect transistor (FET) measurement of a single-walled carbon nanotube (SWNT) shows a transition from a metallic one to a p-type semiconductor after helical wrapping of DNA. Water is found to be critical to activate this metal-semiconductor transition in the ssDNA-SWNT hybrid. Raman spectroscopy confirms the same change in electrical behaviors. According to our ab initio calculations, a band gap can open up in a metallic SWNT with wrapped ssDNA in the presence of water molecules due to charge transfer.
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Affiliation(s)
- Misun Cha
- Department of Physics and Astronomy, FPRD, Institute of Advanced Machinery and Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, Korea
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