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Faraji S, Stano K, Akyildiz H, Yildiz O, Jur JS, Bradford PD. Modifying the morphology and properties of aligned CNT foams through secondary CNT growth. NANOTECHNOLOGY 2018; 29:295602. [PMID: 29697060 DOI: 10.1088/1361-6528/aac03c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
In this work, we report for the first time, growth of secondary carbon nanotubes (CNTs) throughout a three-dimensional assembly of CNTs. The assembly of nanotubes was in the form of aligned CNT/carbon (ACNT/C) foams. These low-density CNT foams were conformally coated with an alumina buffer layer using atomic layer deposition. Chemical vapor deposition was further used to grow new CNTs. The CNT foam's extremely high porosity allowed for growth of secondary CNTs inside the bulk of the foams. Due to the heavy growth of new nanotubes, density of the foams increased more than 2.5 times. Secondary nanotubes had the same graphitic quality as the primary CNTs. Microscopy and chemical analysis revealed that the thickness of the buffer layer affected the diameter, nucleation density as well as growth uniformity across the thickness of the foams. The effects of secondary nanotubes on the compressive mechanical properties of the foams was also investigated.
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Affiliation(s)
- Shaghayegh Faraji
- Department of Textile Engineering, Chemistry and Science, North Carolina State University, Campus Box 8301, Raleigh, NC 27695, United States of America
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2
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Guellati O, Antoni F, Guerioune M, Bégin D. New doping process mode to synthesize in situ N-MWNTs in novel coaxial nanostructure. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.03.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Davis BF, Yan X, Muralidharan N, Oakes L, Pint CL, Maschmann MR. Electrically Conductive Hierarchical Carbon Nanotube Networks with Tunable Mechanical Response. ACS APPLIED MATERIALS & INTERFACES 2016; 8:28004-28011. [PMID: 27689747 DOI: 10.1021/acsami.6b10726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Small diameter carbon nanotube (CNTs) are synthesized directly from a parent CNT forest using a floating catalyst chemical vapor deposition (CVD) method. To support a new CNT generation from an existing forest, an alumina coating was applied to the CNT forest using atomic layer deposition (ALD). The new generation of small diameter CNTs (8 nm average) surround the first generation, filling the interstitial regions. The hierarchical forests exhibit a 5-10-fold increase in stiffness, and the two generations are electrically addressable in spite of the interfacial alumina layer between them. This work enables the design of complex CNT architectures with hierarchical features that bring tailored properties such as high specific surface area and robust mechanical properties that can benefit a range of applications.
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Affiliation(s)
- Benjamin F Davis
- Department of Mechanical & Aerospace Engineering, University of Missouri , Columbia, Missouri 65211, United States
| | - Xingyi Yan
- Department of Mechanical & Aerospace Engineering, University of Missouri , Columbia, Missouri 65211, United States
| | - Nitin Muralidharan
- Department of Mechanical Engineering and Interdisciplinary Materials Science Program, Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Landon Oakes
- Department of Mechanical Engineering and Interdisciplinary Materials Science Program, Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Cary L Pint
- Department of Mechanical Engineering and Interdisciplinary Materials Science Program, Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Matthew R Maschmann
- Department of Mechanical & Aerospace Engineering, University of Missouri , Columbia, Missouri 65211, United States
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Preparation of nitrogen-doped graphene supporting Pt nanoparticles as a catalyst for oxygen reduction and methanol oxidation. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.06.024] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Jiang L, Ding Y, Jiang F, Li L, Mo F. Electrodeposited nitrogen-doped graphene/carbon nanotubes nanocomposite as enhancer for simultaneous and sensitive voltammetric determination of caffeine and vanillin. Anal Chim Acta 2014; 833:22-8. [DOI: 10.1016/j.aca.2014.05.010] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 05/02/2014] [Accepted: 05/06/2014] [Indexed: 11/12/2022]
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Lv R, Cruz-Silva E, Terrones M. Building complex hybrid carbon architectures by covalent interconnections: graphene-nanotube hybrids and more. ACS NANO 2014; 8:4061-4069. [PMID: 24862032 DOI: 10.1021/nn502426c] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Graphene is theoretically a robust two-dimensional (2D) sp(2)-hybridized carbon material with high electrical conductivity and optical transparency. However, due to the existence of grain boundaries and defects, experimentally synthesized large-area polycrystalline graphene sheets are easily broken and can exhibit high sheet resistances; thus, they are not suitable as flexible transparent conductors. As described in this issue of ACS Nano, Tour et al. circumvented this problem by proposing and synthesizing a novel hybrid structure that they have named "rebar graphene", which is composed of covalently interconnected carbon nanotubes (CNTs) with graphene sheets. In this particular configuration, CNTs act as "reinforcing bars" that not only improve the mechanical strength of polycrystalline graphene sheets but also bridge different crystalline domains so as to enhance the electrical conductivity. This report seems to be only the tip of the iceberg since it is also possible to construct novel and unprecedented hybrid carbon architectures by establishing covalent interconnections between CNTs with graphene, thus yielding graphene-CNT hybrids, three-dimensional (3D) covalent CNT networks, 3D graphene networks, etc. In this Perspective, we review the progress of these carbon hybrid systems and describe the challenges that need to be overcome in the near future.
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Affiliation(s)
- Ruitao Lv
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University , Beijing 100084, China
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Deng S, Lei J, Huang Y, Cheng Y, Ju H. Electrochemiluminescent Quenching of Quantum Dots for Ultrasensitive Immunoassay through Oxygen Reduction Catalyzed by Nitrogen-Doped Graphene-Supported Hemin. Anal Chem 2013; 85:5390-6. [DOI: 10.1021/ac3036537] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Shengyuan Deng
- State Key Laboratory of Analytical
Chemistry for Life
Science, Department of Chemistry, Nanjing University, Nanjing 210093, China
| | - Jianping Lei
- State Key Laboratory of Analytical
Chemistry for Life
Science, Department of Chemistry, Nanjing University, Nanjing 210093, China
| | - Yin Huang
- State Key Laboratory of Analytical
Chemistry for Life
Science, Department of Chemistry, Nanjing University, Nanjing 210093, China
| | - Yan Cheng
- State Key Laboratory of Analytical
Chemistry for Life
Science, Department of Chemistry, Nanjing University, Nanjing 210093, China
| | - Huangxian Ju
- State Key Laboratory of Analytical
Chemistry for Life
Science, Department of Chemistry, Nanjing University, Nanjing 210093, China
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Kim JH, Kataoka M, Fujisawa K, Tojo T, Muramatsu H, Vega-Díaz SM, Tristán-López F, Hayashi T, Kim YA, Endo M, Terrones M, Dresselhaus MS. Unusually High Dispersion of Nitrogen-Doped Carbon Nanotubes in DNA Solution. J Phys Chem B 2011; 115:14295-300. [DOI: 10.1021/jp205387y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jin Hee Kim
- Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi 380-853, Japan
| | - Masakazu Kataoka
- Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi 380-853, Japan
| | - Kazunori Fujisawa
- Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi 380-853, Japan
| | - Tomohiro Tojo
- Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi 380-853, Japan
| | - Hiroyuki Muramatsu
- Institute of Carbon Science and Technology, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Sofía M. Vega-Díaz
- Research Center for Exotic Nanocarbons (JST), Shinshu University, Wakasato 4-17-1, Nagano 380-8553, Japan
| | - F. Tristán-López
- Research Center for Exotic Nanocarbons (JST), Shinshu University, Wakasato 4-17-1, Nagano 380-8553, Japan
| | - Takuya Hayashi
- Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi 380-853, Japan
| | - Yoong Ahm Kim
- Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi 380-853, Japan
| | - Morinobu Endo
- Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi 380-853, Japan
- Institute of Carbon Science and Technology, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
- Research Center for Exotic Nanocarbons (JST), Shinshu University, Wakasato 4-17-1, Nagano 380-8553, Japan
| | - Mauricio Terrones
- Research Center for Exotic Nanocarbons (JST), Shinshu University, Wakasato 4-17-1, Nagano 380-8553, Japan
- Department of Physics, Department of Materials Science & Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802-6300, United States
| | - Mildred S. Dresselhaus
- Department of Electrical Engineering and Computer Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, United States
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Castle AB, Gracia-Espino E, Nieto-Delgado C, Terrones H, Terrones M, Hussain S. Hydroxyl-functionalized and N-doped multiwalled carbon nanotubes decorated with silver nanoparticles preserve cellular function. ACS NANO 2011; 5:2458-2466. [PMID: 21366349 DOI: 10.1021/nn200178c] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The present study aims to investigate biocompatibility of silver nanoparticles (Ag-NPs) anchored to different types of multiwalled carbon nanotubes (MWNTs). The MWNTs were decorated with Ag-NPs via a novel chemical route without using any sulfur containing reagent. Three different MWNTs were used as substrate materials for anchoring Ag-NPs: MWNTs-Ag (pure carbon), COx-MWNTs-Ag (carboxyl functionalized), and CNx-MWNTs-Ag (nitrogen-doped). The Ag-NPs, synthesized without thiol capping groups, and which were strongly anchored to the nanotubes surfaces, exhibit an average size of 7 ± 1, 10 ± 1, and 12 ± 1 nm in MWNTs, COx-MWNTs, and CNx-MWNTs, respectively. To determine biocompatibility of these three types of novel hybrid Ag-nanotube materials, cellular function and immune response were evaluated in the human keratinocyte cell line (HaCaT). Cellular assays revealed marginal toxicity after 24 h, and full cellular recovery was observed at 48 h based on an MTS assay for cellular viability. Therefore, Ag-nanotube systems appear to be very different from isolated dispersed Ag-NPs, and due to the strong interactions between the Ag-NPs and the doped nanotube surfaces, they make the Ag particles less toxic because they are not released easily to the cells. Pure carbon MWNTs appear to start releasing Ag-NPs at periods longer than 1 week by an observed decrease in cell proliferation. However, the use of N- and COx-doped MWNTs do not appear to release Ag-NPs to the cells due to the strong binding to the tube surfaces caused by the doped sites. We envisage the use of COx-MWNTs, and CNx-MWNTs anchored with Ag-NP as efficient drug delivery carriers and biosensors.
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Affiliation(s)
- Alicia B Castle
- AFRL/711HPW/RHPB, Wright-Patterson Air Force Base, Ohio 45433-5707, USA
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Zhang JJ, Cheng FF, Zheng TT, Zhu JJ. Design and Implementation of Electrochemical Cytosensor for Evaluation of Cell Surface Carbohydrate and Glycoprotein. Anal Chem 2010; 82:3547-55. [DOI: 10.1021/ac9026127] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Jing-Jing Zhang
- Key Laboratory of Analytical Chemistry for Life Science (Ministry of Education of China), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Fang-Fang Cheng
- Key Laboratory of Analytical Chemistry for Life Science (Ministry of Education of China), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Ting-Ting Zheng
- Key Laboratory of Analytical Chemistry for Life Science (Ministry of Education of China), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Jun-Jie Zhu
- Key Laboratory of Analytical Chemistry for Life Science (Ministry of Education of China), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
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Tu W, Lei J, Jian G, Hu Z, Ju H. Noncovalent Assembly of Picket-Fence Porphyrins on Nitrogen-Doped Carbon Nanotubes for Highly Efficient Catalysis and Biosensing. Chemistry 2010; 16:4120-6. [DOI: 10.1002/chem.200902874] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Yue B, Ma Y, Tao H, Yu L, Jian G, Wang X, Wang X, Lu Y, Hu Z. CNx nanotubes as catalyst support to immobilize platinum nanoparticles for methanol oxidation. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b718283j] [Citation(s) in RCA: 146] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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