201
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Pan H, Chen B. Ultra-flexibility and unusual electronic, magnetic and chemical properties of waved graphenes and nanoribbons. Sci Rep 2014; 4:4198. [PMID: 24569444 PMCID: PMC3935201 DOI: 10.1038/srep04198] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 02/05/2014] [Indexed: 11/09/2022] Open
Abstract
Two-dimensional materials have attracted increasing attention because of their particular properties and potential applications in next-generation nanodevices. In this work, we investigate the physical and chemical properties of waved graphenes/nanoribbons based on first-principles calculations. We show that waved graphenes are compressible up to a strain of 50% and ultra-flexible because of the vanishing in-plane stiffness. The conductivity of waved graphenes is reduced due to charge decoupling under high compression. Our analysis of pyramidalization angles predicts that the chemistry of waved graphenes can be easily controlled by modulating local curvatures. We further demonstrate that band gaps of armchair waved graphene nanoribbons decrease with the increase of compression if they are asymmetrical in geometry, while increase if symmetrical. For waved zigzag nanoribbons, their anti-ferromagnetic states are strongly enhanced by increasing compression. The versatile functions of waved graphenes enable their applications in multi-functional nanodevices and sensors.
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Affiliation(s)
- Hui Pan
- Faculty of Science and Technology, University of Macau, Macau SAR, P. R. China
| | - Bin Chen
- Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, P. R. China
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202
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Bosch S, Zeininger L, Hauke F, Hirsch A. A supramolecular approach for the facile solubilization and separation of covalently functionalized single-walled carbon nanotubes. Chemistry 2014; 20:2537-41. [PMID: 24481923 DOI: 10.1002/chem.201303506] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Indexed: 11/09/2022]
Abstract
Through a combination of an electronic-type selective diazonium-based attachment of a Hamilton receptor unit onto the carbon nanotube framework and a supramolecular recognition approach of a cyanuric acid derivative, we herein introduce a highly promising strategy for the tuning of carbon nanotube solubility and, directly related to that, a solution-based easy and straightforward separation of covalently functionalized carbon nanotube derivatives with respect to their unfunctionalized counterparts. The supramolecular complexation of the cyanuric acid derivative provides the driving force for the dramatically increased dispersibility and for the long-time stability of the individualized single-walled carbon nanotube derivatives in chloroform. The selective covalent functionalization of metallic carbon nanotubes can easily be analyzed with the aid of scanning Raman microscopy techniques. The functional derivatives have furthermore been characterized by UV/Vis-NIR and fluorescence spectroscopy as well as by mass spectrometric coupled thermogravimetric analysis. The investigation of the supramolecular complexation is based on an in-depth UV/Vis-NIR analysis and atomic force microscopy investigations.
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Affiliation(s)
- Sebastian Bosch
- Institute of Advanced Materials and Processes (ZMP), 90762 Fuerth (Germany), Fax: (+49) 9131-85-26-864; Department of Chemistry and Pharmacy, University of Erlangen-Nuremberg, 91054 Erlangen (Germany)
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203
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Kim JE, Kang SH, Moon Y, Chae JJ, Lee AY, Lee JH, Yu KN, Jeong DH, Choi M, Cho MH. Physicochemical determinants of multiwalled carbon nanotubes on cellular toxicity: influence of a synthetic method and post-treatment. Chem Res Toxicol 2014; 27:290-303. [PMID: 24405247 DOI: 10.1021/tx400397g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Since the discovery of carbon nanotubes (CNTs), scientists have performed extensive studies on nanotubes in the fields of materials science, physics, and electronic engineering. Because multiwalled CNTs (MWCNTs) are not homogeneous materials, and because it is not feasible to test every newly synthesized MWCNT, this study was aimed at investigating the physicochemical properties that primarily determine the cellular toxicity of MWCNTs. This study analyzed the relationship between cell viability and physicochemical characteristics following exposure to eight different MWCNTs. We generated eight different MWCNTs using various synthetic methods and post-treatments. From this analysis, we sought to identify the major physicochemical determinants that could predict the cellular toxicity of MWCNTs, regardless of the synthetic method and post-treatment conditions. Creation of binding sites on the tube walls by breaking C-C bonds played a pivotal role in increasing toxicity and was most clearly demonstrated by a Raman G peak shift and the ID/IG ratio. In addition, several factors were found to be strongly related to cellular toxicity: surface charge in the case of MWCNTs created by the chemical vapor deposition method and surface area and EPR intensity in the case of MWCNTs created by the arc discharge based method. The methods developed in this study could be applied to the prediction of the toxicity of newly synthesized MWCNTs.
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Affiliation(s)
- Ji-Eun Kim
- Laboratory of Toxicology, College of Veterinary Medicine, Seoul National University , Seoul 151-742, Korea
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204
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Bisesi JH, Merten J, Liu K, Parks AN, Afrooz ARMN, Glenn JB, Klaine SJ, Kane AS, Saleh NB, Ferguson PL, Sabo-Attwood T. Tracking and quantification of single-walled carbon nanotubes in fish using near infrared fluorescence. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:1973-1983. [PMID: 24383993 DOI: 10.1021/es4046023] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Detection of SWCNTs in complex matrices presents a unique challenge as common techniques lack spatial resolution and specificity. Near infrared fluorescence (NIRF) has emerged as a valuable tool for detecting and quantifying SWCNTs in environmental samples by exploiting their innate fluorescent properties. The objective of this study was to optimize NIRF-based imaging and quantitation methods for tracking and quantifying SWCNTs in an aquatic vertebrate model in conjunction with assessing toxicological end points. Fathead minnows (Pimephales promelas) were exposed by single gavage to SWCNTs and their distribution was tracked using a custom NIRF imaging system for 7 days. No overt toxicity was observed in any of the SWCNT treated fish; however, histopathology observations from gastrointestinal (GI) tissue revealed edema within the submucosa and altered mucous cell morphology. NIRF images showed strong SWCNT-derived fluorescence signals in whole fish and excised intestinal tissues. Fluorescence was not detected in other tissues examined, indicating that no appreciable intestinal absorption occurred. SWCNTs were quantified in intestinal tissues using a NIRF spectroscopic method revealing values that were consistent with the pattern of fluorescence observed with NIRF imaging. Results of this work demonstrate the utility of NIRF imaging as a valuable tool for examining uptake and distribution of SWCNTs in aquatic vertebrates.
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Affiliation(s)
- Joseph H Bisesi
- Department of Environmental and Global Health, Center for Environmental and Human Toxicology, University of Florida , 2187 Mowry Road, Box 110885, Gainesville, Florida 32611, United States
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205
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Mondal T, Bhowmick AK, Krishnamoorti R. Butyl lithium assisted direct grafting of polyoligomeric silsesquioxane onto graphene. RSC Adv 2014. [DOI: 10.1039/c3ra47373b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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206
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Branzoi F, Branzoi V. Nanocomposites Based on Conducting Polymers and Functionalized Carbon Nanotubes with Different Dopants Obtained by Electropolymerization. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/jsemat.2014.43020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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207
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208
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Markiewicz KH, Wilczewska AZ, Chernyaeva O, Winkler K. Ring-opening reactions of epoxidized SWCNT with nucleophilic agents: a convenient way for sidewall functionalization. NEW J CHEM 2014. [DOI: 10.1039/c4nj00148f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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209
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Khodadadei F, Ghourchian H, Soltanieh M, Hosseinalipour M, Mortazavi Y. Rapid and clean amine functionalization of carbon nanotubes in a dielectric barrier discharge reactor for biosensor development. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.10.039] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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210
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Zaragoza-Galán G, Ortíz-Palacios J, Valderrama BX, Camacho-Dávila AA, Chávez-Flores D, Ramos-Sánchez VH, Rivera E. Pyrene-fullerene C60 dyads as light-harvesting antennas. Molecules 2013; 19:352-66. [PMID: 24381052 PMCID: PMC6271591 DOI: 10.3390/molecules19010352] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 12/19/2013] [Accepted: 12/20/2013] [Indexed: 11/29/2022] Open
Abstract
A series of pyrene-fullerene C60 dyads bearing pyrene units (PyFC12, PyFPy, Py2FC12 and PyFN) were synthesized and characterized. Their optical properties were studied by absorption and fluorescence spectroscopies. Dyads were designed in this way because the pyrene moeities act as light-harvesting molecules and are able to produce “monomer” (PyFC12) or excimer emission (PyFPy, Py2FC12 and PyFN). The fluorescence spectra of the dyads exhibited a significant decrease in the amount of pyrene monomer and excimer emission, without the appearance of a new emission band due to fullerene C60. The pyrene fluorescence quenching was found to be almost quantitative, ranging between 96%–99% depending on the construct, which is an indication that energy transfer occurred from one of the excited pyrene species to the fullerene C60.
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Affiliation(s)
- Gerardo Zaragoza-Galán
- Facultad de Ciencia Químicas, Universidad Autónoma de Chihuahua, Campus Universitario #2, Apartado Postal 669, Chihuahua 31125, Mexico.
| | - Jesús Ortíz-Palacios
- Facultad de Ciencia Químicas, Universidad Autónoma de Chihuahua, Campus Universitario #2, Apartado Postal 669, Chihuahua 31125, Mexico.
| | - Bianca X Valderrama
- Facultad de Ciencia Químicas, Universidad Autónoma de Chihuahua, Campus Universitario #2, Apartado Postal 669, Chihuahua 31125, Mexico.
| | - Alejandro A Camacho-Dávila
- Facultad de Ciencia Químicas, Universidad Autónoma de Chihuahua, Campus Universitario #2, Apartado Postal 669, Chihuahua 31125, Mexico.
| | - David Chávez-Flores
- Facultad de Ciencia Químicas, Universidad Autónoma de Chihuahua, Campus Universitario #2, Apartado Postal 669, Chihuahua 31125, Mexico.
| | - Víctor H Ramos-Sánchez
- Facultad de Ciencia Químicas, Universidad Autónoma de Chihuahua, Campus Universitario #2, Apartado Postal 669, Chihuahua 31125, Mexico.
| | - Ernesto Rivera
- Facultad de Ciencia Químicas, Universidad Autónoma de Chihuahua, Campus Universitario #2, Apartado Postal 669, Chihuahua 31125, Mexico.
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211
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Edgington AJ, Petersen EJ, Herzing AA, Podila R, Rao A, Klaine SJ. Microscopic investigation of single-wall carbon nanotube uptake by Daphnia magna. Nanotoxicology 2013; 8 Suppl 1:2-10. [PMID: 24350828 DOI: 10.3109/17435390.2013.847504] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The objectives of this study were to determine the extent of absorption of functionalized single-wall carbon nanotubes (SWCNTs) across the gut epithelial cells in Daphnia magna. Several microscopic techniques were utilized, including micro-Raman spectroscopy, high-resolution transmission electron microscopy (HRTEM) and selective area diffraction (SAD). In an effort to examine the variation in uptake due to surface properties, four groups of differently functionalized SWCNTs were used: hydroxylated (OH-SWCNTs), silicon dioxide (SiO2-SWCNTs), poly aminobenzenesulfonic acid (PABS-SWCNTs) and polyethylene glycol (PEG-SWCNTs). Raman spectroscopy was able to detect OH-SWCNTs within the gut, but lacked the spatial resolution that is needed to identify lower concentrations of SWCNTs that may have been absorbed by body tissues. Initially, low-magnification imaging of exposed D. magna sections in the TEM revealed several features, which suggested absorption of SWCNTs. However, subsequent analysis with additional techniques (HRTEM, X-ray energy-dispersive spectroscopy and SAD) indicated that these features were either artifacts produced via the specimen staining process or consisted of non-graphitic, organic structures. This latter observation emphasizes the inherent difficulty in resolving SWCNTs embedded within a complex, organic matrix, as well as the care with which imaging results must be interpreted and supplemented with other, more analytical techniques.
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212
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Cheng Q, Blais MO, Harris G, Jabbarzadeh E. PLGA-carbon nanotube conjugates for intercellular delivery of caspase-3 into osteosarcoma cells. PLoS One 2013; 8:e81947. [PMID: 24312611 PMCID: PMC3849501 DOI: 10.1371/journal.pone.0081947] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2013] [Accepted: 10/18/2013] [Indexed: 11/18/2022] Open
Abstract
Cancer has arisen to be of the most prominent health care issues across the world in recent years. Doctors have used physiological intervention as well as chemical and radioactive therapeutics to treat cancer thus far. As an alternative to current methods, gene delivery systems with high efficiency, specificity, and safety that can reduce side effects such as necrosis of tissue are under development. Although viral vectors are highly efficient, concerns have arisen from the fact that viral vectors are sourced from lethal diseases. With this in mind, rod shaped nano-materials such as carbon nanotubes (CNTs) have become an attractive option for drug delivery due to the enhanced permeability and retention effect in tumors as well as the ability to penetrate the cell membrane. Here, we successfully engineered poly (lactic-co-glycolic) (PLGA) functionalized CNTs to reduce toxicity concerns, provide attachment sites for pro-apoptotic protein caspase-3 (CP3), and tune the temporal release profile of CP3 within bone cancer cells. Our results showed that CP3 was able to attach to functionalized CNTs, forming CNT-PLGA-CP3 conjugates. We show this conjugate can efficiently transduce cells at dosages as low as 0.05 μg/ml and suppress cell proliferation up to a week with no further treatments. These results are essential to showing the capabilities of PLGA functionalized CNTs as a non-viral vector gene delivery technique to tune cell fate.
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Affiliation(s)
- Qingsu Cheng
- Department of Biomedical Engineering, University of South Carolina, Columbia, South Carolina, United States of America
| | - Marc-Olivier Blais
- Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina, United States of America
| | - Greg Harris
- Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina, United States of America
| | - Ehsan Jabbarzadeh
- Department of Biomedical Engineering, University of South Carolina, Columbia, South Carolina, United States of America
- Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina, United States of America
- Department of Orthopaedic Surgery, University of South Carolina, Columbia, South Carolina, United States of America
- * E-mail:
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213
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Yang T, Zhao X, Nagase S. Cycloaddition of Benzyne to Armchair Single-Walled Carbon Nanotubes: [2 + 2] or [4 + 2]? Org Lett 2013; 15:5960-3. [DOI: 10.1021/ol402811b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Tao Yang
- Institute for Chemical Physics and Department of Chemistry, State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China, and Fukui Institute for Fundamental Chemistry, Kyoto University, Kyoto 606-8103, Japan
| | - Xiang Zhao
- Institute for Chemical Physics and Department of Chemistry, State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China, and Fukui Institute for Fundamental Chemistry, Kyoto University, Kyoto 606-8103, Japan
| | - Shigeru Nagase
- Institute for Chemical Physics and Department of Chemistry, State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China, and Fukui Institute for Fundamental Chemistry, Kyoto University, Kyoto 606-8103, Japan
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214
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XIA CAIJUAN, ZHANG DEHUA, ZHANG YINGTANG. THE ELECTRONIC TRANSPORT PROPERTIES IN NAPHTHOPYRAN-BASED OPTICAL MOLECULAR SWITCH WITH CARBON NANOTUBE ELECTRODES. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2013. [DOI: 10.1142/s0219633613500685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
By applying nonequilibrium Green's function (NEGF) formalism combined first-principles density functional theory (DFT), we investigate the electronic transport properties of optical molecular switch based on the naphthopyran molecule with two different single-walled carbon nanotube (SWCNT) electrodes. The molecule that comprises the switch can convert between the closed and open forms upon photoexcitation. Theoretical results show that these two forms exhibit very different conductance properties both in armchair and zigzag junction, which can realize the on and off states of the molecular switch. Meantime, the chirality of the SWCNT electrodes strongly affects the switching characteristics of the molecular junctions. The maximum value of on–off ratio can reach 292 at 1.6 V for the switch with zigzag SWCNT electrodes.
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Affiliation(s)
- CAI-JUAN XIA
- College of Science, Xi'an Polytechnic University, Xi'an, 710048, P. R. China
| | - DE-HUA ZHANG
- College of Science, Xi'an Polytechnic University, Xi'an, 710048, P. R. China
| | - YING-TANG ZHANG
- College of Science, Xi'an Polytechnic University, Xi'an, 710048, P. R. China
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215
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Fujii S, Enoki T. Nanographene and graphene edges: electronic structure and nanofabrication. Acc Chem Res 2013; 46:2202-10. [PMID: 24383129 DOI: 10.1021/ar300120y] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Graphene can be referred to as an infinite polycyclic aromatic hydrocarbon (PAH) consisting of an infinite number of benzene rings fused together. However, at the nanoscale, nanographene's properties lie in between those of bulk graphene and large PAH molecules, and its electronic properties depend on the influence of the edges, which disrupt the infinite π-electron system. The resulting modulation of the electronic states depends on whether the nanographene edge is the armchair or zigzag type, corresponding to the two fundamental crystal axes. In this Account, we report the results of fabricating both types of edges in the nanographene system and characterizing their electronic properties using a scanning probe microscope. We first introduce the theoretical background to understand the two types of finite size effects on the electronic states of nanographene (i) the standing wave state and (ii) the edge state which correspond to the armchair and zigzag edges, respectively. Most importantly, characterizing the standing wave and edge states could play a crucial role in understanding the chemical reactivity, thermodynamic stability and magnetism of nanosized graphene--important knowledge in the design and realization of promising functionalized nanocarbon materials. In the second part, we present scanning probe microscopic characterization of both edge types to experimentally characterize the two electronic states. As predicted, we find the armchair-edged nanographene to have an energetically stable electronic pattern. The zigzag-edged nanographene shows a nonbonding (π radical) pattern, which is the source of the material's electronic and magnetic properties and its chemical activity. Precise control of the edge geometry is a practical requirement to control the electronic structure. We show that we can fabricate the energetically unstable zigzag edges using scanning probe manipulation techniques, and we discuss challenges in using these techniques for that purpose.
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Affiliation(s)
- Shintaro Fujii
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Toshiaki Enoki
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
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216
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Dispersant-free conducting pastes for flexible and printed nanocarbon electrodes. Nat Commun 2013; 4:2491. [DOI: 10.1038/ncomms3491] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Accepted: 08/22/2013] [Indexed: 11/08/2022] Open
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217
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The structural and electronic properties of (10,0) zigzag Single-Wall Carbon Nanotubes modified by thiophene groups. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.08.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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218
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Zhang L, Petersen EJ, Habteselassie MY, Mao L, Huang Q. Degradation of multiwall carbon nanotubes by bacteria. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2013; 181:335-339. [PMID: 23859846 DOI: 10.1016/j.envpol.2013.05.058] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 05/28/2013] [Accepted: 05/31/2013] [Indexed: 06/02/2023]
Abstract
Understanding the environmental transformation of multiwall carbon nanotubes (MWCNTs) is important to their life cycle assessment and potential environmental impacts. We report that a bacterial community is capable of degrading (14)C-labeled MWCNTs into (14)CO2 in the presence of an external carbon source via co-metabolism. Multiple intermediate products were detected, and genotypic characterization revealed three possible microbial degraders: Burkholderia kururiensis, Delftia acidovorans, and Stenotrophomonas maltophilia. This result suggests that microbe/MWCNTs interaction may impact the long-term fate of MWCNTs.
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Affiliation(s)
- Liwen Zhang
- Department of Crop and Soil Sciences, University of Georgia, 1109 Experiment Street, Griffin, GA 30223, United States
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219
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Ding SN, Chen JF, Xia J, Wang YH, Cosnier S. Voltammetric detection of heparin based on anion exchange at electropolymeric film of pyrrole-alkylammonium cationic surfactant and MWCNTs composite. Electrochem commun 2013. [DOI: 10.1016/j.elecom.2013.07.036] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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220
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Wang Q, Wang X, Chai Z, Hu W. Low-temperature plasma synthesis of carbon nanotubes and graphene based materials and their fuel cell applications. Chem Soc Rev 2013; 42:8821-34. [PMID: 23959435 DOI: 10.1039/c3cs60205b] [Citation(s) in RCA: 143] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Carbon nanotubes (CNTs) and graphene, and materials based on these, are largely used in multidisciplinary fields. Many techniques have been put forward to synthesize them. Among all kinds of approaches, the low-temperature plasma approach is widely used due to its numerous advantages, such as highly distributed active species, reduced energy requirements, enhanced catalyst activation, shortened operation time and decreased environmental pollution. This tutorial review focuses on the recent development of plasma synthesis of CNTs and graphene based materials and their electrochemical application in fuel cells.
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Affiliation(s)
- Qi Wang
- Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China.
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221
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Khajeh M, Laurent S, Dastafkan K. Nanoadsorbents: Classification, Preparation, and Applications (with Emphasis on Aqueous Media). Chem Rev 2013; 113:7728-68. [DOI: 10.1021/cr400086v] [Citation(s) in RCA: 355] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Mostafa Khajeh
- Department of Chemistry, University of Zabol, Mofateh Street, Zabol, Sistan & Balouchestan 98615-538, Iran
| | - Sophie Laurent
- Department of General, Organic and Biomedical Chemistry, NMR and Molecular Imaging Laboratory, University of Mons, 20, Place du Parc, B-7000 Mons, Belgium
| | - Kamran Dastafkan
- Department of Chemistry, University of Zabol, Mofateh Street, Zabol, Sistan & Balouchestan 98615-538, Iran
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222
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Yang T, Zhao X, Nagase S. 1,3-Dipolar cycloadditions of Stone-Wales defective single-walled carbon nanotubes: A theoretical study. J Comput Chem 2013; 34:2223-32. [DOI: 10.1002/jcc.23368] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 05/17/2013] [Accepted: 05/19/2013] [Indexed: 01/08/2023]
Affiliation(s)
- Tao Yang
- Institute for Chemical Physics & Department of Chemistry; State Key Laboratory of Electrical Insulation and Power Equipment; Xi'an Jiaotong University; Xi'an; 710049; China
| | - Xiang Zhao
- Institute for Chemical Physics & Department of Chemistry; State Key Laboratory of Electrical Insulation and Power Equipment; Xi'an Jiaotong University; Xi'an; 710049; China
| | - Shigeru Nagase
- Fukui Institute for Fundamental Chemistry; Kyoto University; Kyoto; 606-8103; Japan
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223
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Alexander A, Eller J, Ali S, Berry BC. The Effects of co-solvents on the reaction of amino-terminated polystyrene with fullerene. J Appl Polym Sci 2013. [DOI: 10.1002/app.39488] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Amy Alexander
- University of Arkansas at Little Rock; 2801 S. University Avenue, Little Rock; Aarkansas; 72204
| | - Jonathan Eller
- University of Arkansas at Little Rock; 2801 S. University Avenue, Little Rock; Aarkansas; 72204
| | - Shariq Ali
- University of Arkansas at Little Rock; 2801 S. University Avenue, Little Rock; Aarkansas; 72204
| | - Brian C. Berry
- University of Arkansas at Little Rock; 2801 S. University Avenue, Little Rock; Aarkansas; 72204
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224
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A needle trap device packed with a sol–gel derived, multi-walled carbon nanotubes/silica composite for sampling and analysis of volatile organohalogen compounds in air. Anal Chim Acta 2013; 785:67-74. [DOI: 10.1016/j.aca.2013.04.057] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Revised: 04/25/2013] [Accepted: 04/27/2013] [Indexed: 11/23/2022]
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225
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COATES MEGAN, NYOKONG TEBELLO. X-RAY PHOTOELECTRON SPECTROSCOPY AND SCANNING ELECTROCHEMICAL MICROSCOPY STUDIES OF BRANCHED MULTIWALLED CARBON NANOTUBE PAPER MODIFIED BY ELECTROCHEMICAL GRAFTING AND CLICK CHEMISTRY. INTERNATIONAL JOURNAL OF NANOSCIENCE 2013. [DOI: 10.1142/s0219581x13500178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Modification of nanomaterials through electrochemical grafting is a useful approach to introduce linking groups on to the surface of these structures. This work shows the possibility of applying electrochemical grafting to branched multiwalled carbon nanotube paper with an electrical resistance of 0.1 ohm-cm, and subsequent reaction of the grafted 4-azidobenzenediazonium with ethynylferrocene through the Sharpless click chemistry reaction. A comparison is made between this paper electrode and adsorbed single-walled carbon nanotubes on a glassy carbon electrode, with electrochemistry, X-ray photoelectron spectroscopy and scanning electrochemical microscopy used for characterization.
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Affiliation(s)
- MEGAN COATES
- Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa
| | - TEBELLO NYOKONG
- Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa
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226
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Guldi DM, Costa RD. Nanocarbon Hybrids: The Paradigm of Nanoscale Self-Ordering/Self-Assembling by Means of Charge Transfer/Doping Interactions. J Phys Chem Lett 2013; 4:1489-1501. [PMID: 26282304 DOI: 10.1021/jz4001714] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The scope of this Perspective is to highlight the potential of nanoscale self-ordering/self-assembling nanocarbons-fullerenes, single-wall carbon nanotubes, and graphene-en route toward novel charge transfer hybrids that unify several functions such as light harvesting, charge separation, and, eventually, catalysis. All of the given examples are fully characterized by a broad range of spectroscopic as well as microscopic techniques and, as such, document the success in tuning the electronic structure of functional nanocarbons by means of charge transfer/doping interactions.
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Affiliation(s)
- Dirk M Guldi
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universitaet Erlangen-Nuernberg, Egerlandstrasse 3, 91058, Erlangen, Germany
| | - Rubén D Costa
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universitaet Erlangen-Nuernberg, Egerlandstrasse 3, 91058, Erlangen, Germany
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227
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Wang HX, Wang Q, Zhou KG, Zhang HL. Graphene in light: design, synthesis and applications of photo-active graphene and graphene-like materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:1266-1283. [PMID: 23554268 DOI: 10.1002/smll.201203040] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 01/17/2013] [Indexed: 06/02/2023]
Abstract
Graphene functionalized with photo-active units has become one of the most exciting topics of research in the last few years, which remarkably sustains and expands the graphene boom. The rise of photo-active graphene in photonics and optoelectronics is evidenced by a spate of recent reports on topics ranging from photodetectors, photovoltaics, and optoelectronics to photocatalysis. For these applications, the fabrication of photo-active graphene through appropriate chemical functionalization strategies is essential as pristine graphene has zero bandgap and only weak absorption of photons. Written from the chemists' point of view, up-to-date chemical functionalization of graphene with various small organic molecules, conjugated polymers, rare-earth components, and inorganic semiconductors is reviewed. Particular attention is paid to the development of graphene functionalized with light-harvesting moieties, including materials synthesis, characterization, energy/charge-transfer processes, and applications in photovoltaics. Challenges currently faced by researchers and future perspectives in this field are also discussed.
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Affiliation(s)
- Hang-Xing Wang
- State Key Laboratory of Applied Organic, Chemistry (SKLAOC), Lanzhou University, Lanzhou 730000, PR China
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228
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Maeda Y, Higo J, Amagai Y, Matsui J, Ohkubo K, Yoshigoe Y, Hashimoto M, Eguchi K, Yamada M, Hasegawa T, Sato Y, Zhou J, Lu J, Miyashita T, Fukuzumi S, Murakami T, Tohji K, Nagase S, Akasaka T. Helicity-Selective Photoreaction of Single-Walled Carbon Nanotubes with Organosulfur Compounds in the Presence of Oxygen. J Am Chem Soc 2013; 135:6356-62. [DOI: 10.1021/ja402199n] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yutaka Maeda
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
- PRESTO, Japan Science and Technology Agency, Chiyoda, Tokyo 102-0075, Japan
| | - Junki Higo
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Yuri Amagai
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Jun Matsui
- PRESTO, Japan Science and Technology Agency, Chiyoda, Tokyo 102-0075, Japan
- Institute of Multidisciplinary
Research for Advanced Materials, Tohoku University, Katahira, Sendai 980-8577, Japan
| | - Kei Ohkubo
- Department of Material and Life
Science, Division of Advanced Science and Biotechnology, Graduate
School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency, Osaka 565-0871, Japan
| | - Yusuke Yoshigoe
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Masahiro Hashimoto
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Kazuhiro Eguchi
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Michio Yamada
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Tadashi Hasegawa
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Yoshinori Sato
- PRESTO, Japan Science and Technology Agency, Chiyoda, Tokyo 102-0075, Japan
- Graduate School of Environmental
Studies, Tohoku University, Aoba, Sendai
980-8579, Japan
| | - Jing Zhou
- Department
of Physics, Peking University, Beijing
100871, People’s
Republic of China
| | - Jing Lu
- Department
of Physics, Peking University, Beijing
100871, People’s
Republic of China
| | - Tokuji Miyashita
- Institute of Multidisciplinary
Research for Advanced Materials, Tohoku University, Katahira, Sendai 980-8577, Japan
| | - Shunichi Fukuzumi
- Department of Material and Life
Science, Division of Advanced Science and Biotechnology, Graduate
School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency, Osaka 565-0871, Japan
- Department of
Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
| | - Tatsuya Murakami
- PRESTO, Japan Science and Technology Agency, Chiyoda, Tokyo 102-0075, Japan
- Institute for Integrated Cell-Material
Sciences (WPI-iCeMS), Kyoto University,
Kyoto 606-8501, Japan
| | - Kazuyuki Tohji
- Graduate School of Environmental
Studies, Tohoku University, Aoba, Sendai
980-8579, Japan
| | - Shigeru Nagase
- Fukui
Institute for Fundamental
Chemistry, Kyoto University, Kyoto 606-8103,
Japan
| | - Takeshi Akasaka
- Life Science Center
of Tsukuba
Advanced Research Alliance, University of Tsukuba, Tsukuba 305-8577, Japan
- College of Materials Science
and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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229
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Wear behavior of in situ polymerized carbon nanotube/ultra high molecular weight polyethylene composites. Macromol Res 2013. [DOI: 10.1007/s13233-013-1130-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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230
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Quantitative study on the interaction of Ag+ and Pd2+ with CNT-graft-PCA (polycitric acid) in aqueous solution. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2012.12.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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231
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Fujigaya T, Nakashima N. Fuel cell electrocatalyst using polybenzimidazole-modified carbon nanotubes as support materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:1666-81. [PMID: 23423836 DOI: 10.1002/adma.201204461] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 11/26/2012] [Indexed: 05/11/2023]
Abstract
Toward the next generation fuel cell systems, the development of a novel electrocatalyst for the polymer electrolyte fuel cell (PEFC) is crucial to overcome the drawbacks of the present electrocatalyst. As a conductive supporting material for the catalyst, carbon nanotubes (CNTs) have emerged as a promising candidate, and many attempts have been carried out to introduce CNT, in place of carbon black. On the other hand, as a polymer electrolyte, polybenzimidazoles (PBIs) have been recognized as a powerful candidate due to the high proton conductivity above 100 °C under non-humid conditions. In 2008, we found that these two materials have a strong physical interaction and form a stable hybrid material, in which the PBIs uniformly wrap the surfaces of the CNTs. Furthermore, PBIs serve as effective binding sites for the formation of platinum (Pt) nanoparticles to fabricate a ternary composite (CNT/PBIs/Pt). In this review article, we summarize the fundamental properties of the CNT/PBIs/Pt and discuss their potential as a new electrocatalyst for the PEFC in comparison with the conventional ones. Furthermore, potential applications of CNT/PBIs including use of the materials for oxygen reduction catalysts and reinforcement of PBI films are summarized.
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Affiliation(s)
- Tsuyohiko Fujigaya
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, Nishi-ku, Fukuoka 819-0395 Japan.
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232
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Anderson A, Lu* F, Meziani* MJ, Sun* YP. Metallic Single-walled Carbon Nanotubes for Electrically Conductive Materials and Devices. CARBON NANOTUBE-POLYMER COMPOSITES 2013. [DOI: 10.1039/9781849736817-00182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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233
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Sager TM, Wolfarth MW, Andrew M, Hubbs A, Friend S, Chen TH, Porter DW, Wu N, Yang F, Hamilton RF, Holian A. Effect of multi-walled carbon nanotube surface modification on bioactivity in the C57BL/6 mouse model. Nanotoxicology 2013; 8:317-27. [PMID: 23432020 DOI: 10.3109/17435390.2013.779757] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The current study tests the hypothesis that multi-walled carbon nanotubes (MWCNT) with different surface chemistries exhibit different bioactivity profiles in vivo. In addition, the study examined the potential contribution of the NLRP3 inflammasome in MWCNT-induced lung pathology. Unmodified (BMWCNT) and MWCNT that were surface functionalised with -COOH (FMWCNT), were instilled into C57BL/6 mice. The mice were then examined for biomarkers of inflammation and injury, as well as examined histologically for development of pulmonary disease as a function of dose and time. Biomarkers for pulmonary inflammation included cytokines, mediators and the presence of inflammatory cells (IL-1β, IL-18, IL-33, cathepsin B and neutrophils) and markers of injury (albumin and lactate dehydrogenase). The results show that surface modification by the addition of the -COOH group to the MWCNT, significantly reduced the bioactivity and pathogenicity. The results of this study also suggest that in vivo pathogenicity of the BMWCNT and FMWCNT correlates with activation of the NLRP3 inflammasome in the lung.
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Affiliation(s)
- Tina M Sager
- Department Biomedical and Pharmaceutical Sciences, University of Montana, Center for Environmental Health Sciences , Missoula, MT 59812 , USA
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234
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Zamolo VA, Vazquez E, Prato M. Carbon nanotubes: synthesis, structure, functionalization, and characterization. Top Curr Chem (Cham) 2013; 350:65-109. [PMID: 23408276 DOI: 10.1007/128_2012_403] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Carbon nanotubes have generated great expectations in the scientific arena, mainly due to their spectacular properties, which include a high aspect ratio, high strain resistance, and high strength, along with high conductivities. Nowadays, carbon nanotubes are produced by a variety of methods, each of them with advantages and disadvantages. Once produced, carbon nanotubes can be chemically modified, using a wide range of chemical reactions. Functionalization makes these long wires much easier to manipulate and dispersible in several solvents. In addition, the properties of carbon nanotubes can be combined with those of organic appendages. Finally, carbon nanotubes need to be carefully characterized, either as pristine or modified materials.
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Affiliation(s)
- Valeria Anna Zamolo
- Department of Chemical and Pharmaceutical Sciences, Center of Excellence for Nanostructured Materials (CENMAT) and INSTM, Unit of Trieste, University of Trieste, Piazzale Europa 1, 34127, Trieste, Italy
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235
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Mandal A, Nandi AK. Ionic liquid integrated multiwalled carbon nanotube in a poly(vinylidene fluoride) matrix: formation of a piezoelectric β-polymorph with significant reinforcement and conductivity improvement. ACS APPLIED MATERIALS & INTERFACES 2013; 5:747-760. [PMID: 23281687 DOI: 10.1021/am302275b] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Multiwalled carbon nanotubes (MWNTs) are functionalized covalently with ionic liquid (IL, 3-aminoethyl imidazolium bromide) which helps good dispersion of IL-functionalized MWNTs (MWNT-IL) in the poly(vinylidene fluoride) (PVDF) matrix. Analysis of transmission electron microscopy (TEM) micrographs suggests ∼10 nm coating thickness of MWNTs by ILs, and the covalent linkage of ILs with MWNTs is confirmed from FT-IR and Raman spectra. PVDF nanocomposites with full β-polymorphic (piezoelectric) form are prepared using MWNT-IL by both the solvent cast and melt-blending methods. The FE-SEM and TEM micrographs indicate that IL-bound MWNTs are homogeneously dispersed within the PVDF matrix. Increasing MWNT-IL concentration in the composites results in increased β polymorph formation with a concomitant decrease of the α polymorph, and a 100% β polymorph formation occurs for 1 wt % MWNT-IL in both the fabrication conditions. A differential scanning calorimetry (DSC) study shows that the MWNT-ILs are an efficient nucleating agent for PVDF crystallization preferentially nucleating the β form due to its dipolar interactions with PVDF. The glass transition temperature (T(g)) gradually increases with an increase in MWNT-IL concentration, and the storage modulus (G') of the composites increases significantly, showing a maximum increase of 101.3% for 0.5 wt % MWNT-IL. The Young's modulus increases with MWNT-IL concentration, and analysis of the data using the Halpin-Tsai equation suggests that at low concentration they adopt an orientation parallel to the film surface; however, at higher MWNT-IL concentration it is randomly oriented. The tensile strength also increases with an increase in MWNT-IL concentration, and both the Young's modulus and the tensile strength of solvent cast films are lower than melt-blended samples. The elongation at break in the solvent cast samples shows a maximum, but in melt-blended samples it decreases continuously with increasing MWNT-IL concentration. The composites exhibit a very low conductivity percolation threshold at 0.05 wt %, and the three-dimensional conducting network is produced. Higher conductivity (∼1 S/cm for 1% MWNT-IL) than other MWNT/PVDF composites has been attributed to the anchored ionic liquid.
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Affiliation(s)
- Amit Mandal
- Polymer Science Unit, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
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236
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Liu X, Bu C, Nan Z, Zheng L, Qiu Y, Lu X. Enzymes immobilized on amine-terminated ionic liquid-functionalized carbon nanotube for hydrogen peroxide determination. Talanta 2013; 105:63-8. [DOI: 10.1016/j.talanta.2012.11.059] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Revised: 11/18/2012] [Accepted: 11/24/2012] [Indexed: 11/28/2022]
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237
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Beheshtian J, Ahmadi Peyghan A. Theoretical study on the functionalization of BC₂N nanotube with amino groups. J Mol Model 2013; 19:2211-6. [PMID: 23361262 DOI: 10.1007/s00894-013-1759-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Accepted: 01/07/2013] [Indexed: 10/27/2022]
Abstract
Using density functional theory calculations, we investigated properties of a functionalized BC₂N nanotube with NH₃ and five other NH₂-X molecules in which one of the hydrogen atoms of NH₃ is substituted by X = -CH₃, -CH₂CH₃, -COOH, -CH₂COOH and -CH₂CN functional groups. It was found that NH₃ can be preferentially adsorbed on top of the boron atom, with adsorption energy of -12.0 kcal mol(-1). The trend of adsorption-energy change can be correlated with the trend of relative electron-withdrawing or -donating capability of the functional groups. The adsorption energies are calculated to be in the range of -1.8 to -14.2 kcal mol(-1), and their relative magnitude order is found as follows: H₂N(CH₂CH₃) > H₂N(CH₃) > NH₃ > H2N(CH₂COOH) > H2N(CH₂CN) > H₂N(COOH). Overall, the functionalization of BC₂N nanotube with the amino groups results in little change in its electronic properties. The preservation of electronic properties of BC₂N coupled with the enhancement of solubility renders their chemical modification with either NH₃ or amino functional groups to be a way for the purification of BC₂N nanotubes.
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Affiliation(s)
- Javad Beheshtian
- Department of Chemistry, Shahid Rajaee Teacher Training University, PO Box: 16875-163, Tehran, Iran
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238
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Guo Z, Feng Y, He S, Qu M, Chen H, Liu H, Wu Y, Wang Y. CO(2) -responsive "smart" single-walled carbon nanotubes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:584-90. [PMID: 23132767 DOI: 10.1002/adma.201202991] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Revised: 09/30/2012] [Indexed: 05/02/2023]
Abstract
A new type of "smart" single-walled carbon nanotubes is created by wrapping a pyrene-labeled CO(2) -responsive polymer via π-π stacking. The polymer/SWNT hybrids not only undergo a hydrophobic-hydrophilic transition upon CO(2) stimulus of CO(2) in a mixed solvent, but also exhibit switchable dispersion/aggregation states upon the alternate bubbling of CO(2) and N(2) in pure water.
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Affiliation(s)
- Zanru Guo
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P. R. China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China
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239
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Abstract
Graphene, a material made exclusively of sp(2) carbon atoms with its π electrons delocalized over the entire 2D network, is somewhat chemically inert. Covalent functionalization can enhance graphene's properties including opening its band gap, tuning conductivity, and improving solubility and stability. Covalent functionalization of pristine graphene typically requires reactive species that can form covalent adducts with the sp(2) carbon structures in graphene. In this Account, we describe graphene functionalization reactions using reactive intermediates of radicals, nitrenes, carbenes, and arynes. These reactive species covalently modify graphene through free radical addition, CH insertion, or cycloaddition reactions. Free radical additions are among the most common reaction, and these radicals can be generated from diazonium salts and benzoyl peroxide. Electron transfer from graphene to aryl diazonium ion or photoactivation of benzoyl peroxide yields aryl radicals that subsequently add to graphene to form covalent adducts. Nitrenes, electron-deficient species generated by thermal or photochemical activation of organic azides, can functionalize graphene very efficiently. Because perfluorophenyl nitrenes show enhanced bimolecular reactions compared with alkyl or phenyl nitrenes, perfluorophenyl azides are especially effective. Carbenes are used less frequently than nitrenes, but they undergo CH insertion and C═C cycloaddition reactions with graphene. In addition, arynes can serve as a dienophile in a Diels-Alder type reaction with graphene. Further study is needed to understand and exploit the chemistry of graphene. The generation of highly reactive intermediates in these reactions leads to side products that complicate the product composition and analysis. Fundamental questions remain about the reactivity and regioselectivity of graphene. The differences in the basal plane and the undercoordinated edges of graphene and the zigzag versus arm-chair configurations warrant comprehensive studies. The availability of well-defined pristine graphene starting materials in large quantities remains a key obstacle to the advancement of synthetic graphene chemistry.
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Affiliation(s)
- Jaehyeung Park
- Department of Chemistry, University of Massachusetts Lowell, 1 University Avenue, Lowell, Massachusetts 01854, United States
| | - Mingdi Yan
- Department of Chemistry, University of Massachusetts Lowell, 1 University Avenue, Lowell, Massachusetts 01854, United States
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240
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241
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Ding M, Tang Y, Star A. Understanding Interfaces in Metal-Graphitic Hybrid Nanostructures. J Phys Chem Lett 2013; 4:147-160. [PMID: 26291227 DOI: 10.1021/jz301711a] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Metal-graphitic interfaces formed between metal nanoparticles (MNPs) and carbon nanotubes (CNTs) or graphene play an important role in the properties of such hybrid nanostructures. This Perspective summarizes different types of interfaces that exist within the metal-carbon nanoassemblies and discusses current efforts on understanding and modeling the interfacial conditions and interactions. Characterization of the metal-graphitic interfaces is described here, including microscopy, spectroscopy, electrochemical techniques, and electrical measurements. Recent studies on these nanohybrids have shown that the metal-graphitic interfaces play critical roles in both controlled assembly of nanoparticles and practical applications of nanohybrids in chemical sensors and fuel cells. Better understanding, design, and manipulation of metal-graphitic interfaces could therefore become the new frontier in the research of MNP/CNT or MNP/graphene hybrid systems.
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Affiliation(s)
- Mengning Ding
- National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, Pennsylvania 15236, United States
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Yifan Tang
- National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, Pennsylvania 15236, United States
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Alexander Star
- National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, Pennsylvania 15236, United States
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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242
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Boukhvalov DW. DFT modeling of the covalent functionalization of graphene: from ideal to realistic models. RSC Adv 2013. [DOI: 10.1039/c3ra23372c] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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243
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Adeli M, Soleyman R, Beiranvand Z, Madani F. Carbon nanotubes in cancer therapy: a more precise look at the role of carbon nanotube–polymer interactions. Chem Soc Rev 2013; 42:5231-56. [DOI: 10.1039/c3cs35431h] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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244
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Sathe BR. Rhodium nanoparticle–carbon nanosphere hybrid material as an electrochemical hydrogen sensor. RSC Adv 2013. [DOI: 10.1039/c3ra00105a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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245
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246
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Neihsial S, Periyasamy G, Samanta PK, Pati SK. Understanding the Binding Mechanism of Various Chiral SWCNTs and ssDNA: A Computational Study. J Phys Chem B 2012. [DOI: 10.1021/jp305894c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Siamkhanthang Neihsial
- Theoretical
Sciences Unit and ‡New Chemistry Unit, Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur P.O., Bangalore
560064, India
| | - Ganga Periyasamy
- Theoretical
Sciences Unit and ‡New Chemistry Unit, Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur P.O., Bangalore
560064, India
| | - Pralok K. Samanta
- Theoretical
Sciences Unit and ‡New Chemistry Unit, Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur P.O., Bangalore
560064, India
| | - Swapan K. Pati
- Theoretical
Sciences Unit and ‡New Chemistry Unit, Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur P.O., Bangalore
560064, India
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247
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Lin Y, Connell JW. Advances in 2D boron nitride nanostructures: nanosheets, nanoribbons, nanomeshes, and hybrids with graphene. NANOSCALE 2012; 4:6908-39. [PMID: 23023445 DOI: 10.1039/c2nr32201c] [Citation(s) in RCA: 351] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The recent surge in graphene research has stimulated interest in the investigation of various 2-dimensional (2D) nanomaterials. Among these materials, the 2D boron nitride (BN) nanostructures are in a unique position. This is because they are the isoelectric analogs to graphene structures and share very similar structural characteristics and many physical properties except for the large band gap. The main forms of the 2D BN nanostructures include nanosheets (BNNSs), nanoribbons (BNNRs), and nanomeshes (BNNMs). BNNRs are essentially BNNSs with narrow widths in which the edge effects become significant; BNNMs are also variations of BNNSs, which are supported on certain metal substrates where strong interactions and the lattice mismatch between the substrate and the nanosheet result in periodic shallow regions on the nanosheet surface. Recently, the hybrids of 2D BN nanostructures with graphene, in the form of either in-plane hybrids or inter-plane heterolayers, have also drawn much attention. In particular, the BNNS-graphene heterolayer architectures are finding important electronic applications as BNNSs may serve as excellent dielectric substrates or separation layers for graphene electronic devices. In this article, we first discuss the structural basics, spectroscopic signatures, and physical properties of the 2D BN nanostructures. Then, various top-down and bottom-up preparation methodologies are reviewed in detail. Several sections are dedicated to the preparation of BNNRs, BNNMs, and BNNS-graphene hybrids, respectively. Following some more discussions on the applications of these unique materials, the article is concluded with a summary and perspectives of this exciting new field.
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Affiliation(s)
- Yi Lin
- National Institute of Aerospace, 100 Exploration way, Hampton, VA 23666, USA.
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248
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Maeda Y, Saito K, Akamatsu N, Chiba Y, Ohno S, Okui Y, Yamada M, Hasegawa T, Kako M, Akasaka T. Analysis of Functionalization Degree of Single-Walled Carbon Nanotubes Having Various Substituents. J Am Chem Soc 2012; 134:18101-8. [DOI: 10.1021/ja308969p] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Yutaka Maeda
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Kazuma Saito
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Norihisa Akamatsu
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Yuriko Chiba
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Seina Ohno
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Yumi Okui
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Michio Yamada
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Tadashi Hasegawa
- Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan
| | - Masahiro Kako
- Department of Applied Physics
and Chemistry, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
| | - Takeshi Akasaka
- Life Science Center of Tsukuba
Advanced Research Alliance, University of Tsukuba, Ibaraki 305-8577, Japan
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Josefsen LB, Boyle RW. Unique diagnostic and therapeutic roles of porphyrins and phthalocyanines in photodynamic therapy, imaging and theranostics. Theranostics 2012; 2:916-66. [PMID: 23082103 PMCID: PMC3475217 DOI: 10.7150/thno.4571] [Citation(s) in RCA: 379] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Accepted: 08/10/2012] [Indexed: 02/07/2023] Open
Abstract
Porphyrinic molecules have a unique theranostic role in disease therapy; they have been used to image, detect and treat different forms of diseased tissue including age-related macular degeneration and a number of different cancer types. Current focus is on the clinical imaging of tumour tissue; targeted delivery of photosensitisers and the potential of photosensitisers in multimodal biomedical theranostic nanoplatforms. The roles of porphyrinic molecules in imaging and pdt, along with research into improving their selective uptake in diseased tissue and their utility in theranostic applications are highlighted in this Review.
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