51
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Kördel C, Setaro A, Bluemmel P, Popeney CS, Reich S, Haag R. Controlled reversible debundling of single-walled carbon nanotubes by photo-switchable dendritic surfactants. NANOSCALE 2012; 4:3029-3031. [PMID: 22504733 DOI: 10.1039/c2nr30305a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Stimulus responsive surfactants based on dendritic glycerol azobenzene conjugates were used to solubilize and debundle single-walled carbon nanotubes in aqueous media. Their debundling property as well as their reaggregation behavior upon irradiation with light was examined and light triggered reversible bundling and precipitation are shown.
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Affiliation(s)
- Christian Kördel
- Freie Universität Berlin, Institut für Chemie und Biochemie, Takustraße 3, 14195 Berlin, Germany
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52
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Zhao J, Wang Z, Mashayekhi H, Mayer P, Chefetz B, Xing B. Pulmonary surfactant suppressed phenanthrene adsorption on carbon nanotubes through solubilization and competition as examined by passive dosing technique. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:5369-5377. [PMID: 22519404 DOI: 10.1021/es2044773] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Adsorption of phenanthrene on carbon nanotubes (CNTs) was examined in the presence of pulmonary surfactant (Curosurf) and its main components, dipalmitoyl phosphatidylcholine (DPPC) and bovine serum albumin (BSA). A passive-dosing method based on equilibrium partitioning from a preloaded polymer was successfully employed to measure phenanthrene binding and speciation at controlled freely dissolved concentrations while avoiding phase separation steps. Curosurf, DPPC, and BSA could all linearly solubilize phenanthrene, and phenanthrene solubilization by Curosurf was 4 times higher than individual components (DPPC or BSA). In the presence of Curosurf, DPPC or BSA, adsorption of phenanthrene by multiwalled CNTs (MWCNTs) was suppressed, showing competitive adsorption between pulmonary surfactant (or DPPC, BSA) and phenanthrene. Competitive adsorption between Curosurf and phenanthrene was the strongest. Therefore, when phenanthrene-adsorbed CNTs enter the respiratory tract, phenanthrene can be desorbed due to both solubilization and competition. The bioaccessibility of phenanthrene adsorbed on three MWCNTs in the respiratory tract would be positively related to the size of their outer diameters. Moreover, the contribution of solubilization and competition to desorption of phenanthrene from MWCNTs was successfully separated for the first time. These findings demonstrate the two mechanisms on how pulmonary surfactants can enhance desorption and thus possibly biological absorption of phenanthrene adsorbed on CNTs.
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Affiliation(s)
- Jian Zhao
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
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53
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Li X, Shi Y, Miao B, Zhao Y. Effects of Embedded Carbon Nanotube on Properties of Biomembrane. J Phys Chem B 2012; 116:5391-7. [DOI: 10.1021/jp301864z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xiaoyi Li
- Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, National Center for Nanosciences and Technology of China, Beijing 100191, and Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
- College of Materials Science
and Opto-electronics Technology, Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R.
China
| | - Yanchao Shi
- Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, National Center for Nanosciences and Technology of China, Beijing 100191, and Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
- College of Materials Science
and Opto-electronics Technology, Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R.
China
| | - Bing Miao
- College of Materials Science
and Opto-electronics Technology, Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R.
China
| | - Yuliang Zhao
- Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, National Center for Nanosciences and Technology of China, Beijing 100191, and Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
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54
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Angelikopoulos P, Bock H. The science of dispersing carbon nanotubes with surfactants. Phys Chem Chem Phys 2012; 14:9546-57. [PMID: 22428164 DOI: 10.1039/c2cp23436j] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Self-assembled structures adsorbed on carbon nanotubes and other nanofibres offer a plethora of opportunities to endow them with new functions and to integrate them into devices and materials. At the same time they are key to solve the greatest problem in carbon nanotube utilisation--debundling and individualisation. Success will inevitably require an understanding of the underlying structure-function relationship of the adsorbed surfactant layer. Computer simulations are ideally suited to develop this understanding as they enable us to study the structure-function relationship in great detail. Combining the results from mesoscale and atomistic simulations we begin to develop this understanding and derive a number of recommendations for optimal dispersion design.
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55
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De Nicola A, Zhao Y, Kawakatsu T, Roccatano D, Milano G. Validation of a hybrid MD-SCF coarse-grained model for DPPC in non-lamellar phases. Theor Chem Acc 2012. [DOI: 10.1007/s00214-012-1167-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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56
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Murthy BN, Zeile S, Nambiar M, Nussio MR, Gibson CT, Shapter JG, Jayaraman N, Voelcker NH. Self assembly of bivalent glycolipids on single walled carbon nanotubes and their specific molecular recognition properties. RSC Adv 2012. [DOI: 10.1039/c2ra01192a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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57
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Jing B, Zhu Y. Disruption of Supported Lipid Bilayers by Semihydrophobic Nanoparticles. J Am Chem Soc 2011; 133:10983-9. [DOI: 10.1021/ja2040305] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Benxin Jing
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Yingxi Zhu
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
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58
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Abstract
We have used coarse-grained molecular dynamics simulations to show that hydrated lipid micelles of preferred sizes and amounts of filling with hydrophobic molecules can be self-assembled on the surfaces of carbon nanotubes. We simulated micelle formation on a hydrated (40,0) carbon nanotube with an open end that was covered with amphiphilic double-headed CH(3)(CH(2))(14)CH(((CH(2)OCH(2)CH(2))(2)(CH(2)COCH(2)))(2)H)(2) or single-headed CH(3)(CH(2))(14)CH(2)((CH(2)OCH(2)CH(2))(2)(CH(2)COCH(2)))(4)H lipids and filled with hexadecane molecules. Once the hexadecane molecules inside the nanotube were pressurized and the lipids on its surface were dragged by the water flowing around it, kinetically stable micelles filled with hexadecane molecules were sequentially formed at the nanotube tip. We investigated the stability of the thus-formed kinetically stable filled micelles and compared them with thermodynamically stable filled micelles that were self-assembled in the solution.
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Affiliation(s)
- Niladri Patra
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, USA
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59
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Kojima M, Chiba T, Niishima J, Higashi T, Fukuda T, Nakajima Y, Kurosu S, Hanajiri T, Ishii K, Maekawa T, Inoue A. Dispersion of single-walled carbon nanotubes modified with poly-l-tyrosine in water. NANOSCALE RESEARCH LETTERS 2011; 6:128. [PMID: 21711636 PMCID: PMC3211174 DOI: 10.1186/1556-276x-6-128] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2010] [Accepted: 02/10/2011] [Indexed: 05/27/2023]
Abstract
In this study, complexes composed of poly-l-tyrosine (pLT) and single-walled carbon nanotubes (SWCNTs) were produced and the dispersibility of the pLT/SWCNT complexes in water by measuring the ζ potential of the complexes and the turbidity of the solution were investigated. It is found that the absolute value of the ζ potential of the pLT/SWCNT complexes is as high as that of SWCNTs modified with double-stranded DNA (dsDNA) and that the complexes remain stably dispersed in the water at least for two weeks. Thermogravimetry analysis (TGA) and visualization of the surface structures of pLT/SWCNT complexes using an atomic force microscope (AFM) were also carried out.
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Affiliation(s)
- Mio Kojima
- Bio-Nano Electronics Research Centre, Toyo University 2100, Kujirai, Kawagoe, Saitama 350-8585, Japan
| | - Tomoka Chiba
- Faculty of Life Sciences, Toyo University 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma 374-0113, Japan
| | - Junichiro Niishima
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma 374-0113, Japan
| | - Toshiaki Higashi
- Graduate School of Interdisciplinary New Science, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585, Japan
| | - Takahiro Fukuda
- Bio-Nano Electronics Research Centre, Toyo University 2100, Kujirai, Kawagoe, Saitama 350-8585, Japan
| | - Yoshikata Nakajima
- Bio-Nano Electronics Research Centre, Toyo University 2100, Kujirai, Kawagoe, Saitama 350-8585, Japan
| | - Shunji Kurosu
- Graduate School of Interdisciplinary New Science, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585, Japan
| | - Tatsuro Hanajiri
- Bio-Nano Electronics Research Centre, Toyo University 2100, Kujirai, Kawagoe, Saitama 350-8585, Japan
- Graduate School of Interdisciplinary New Science, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585, Japan
| | - Koji Ishii
- Asylum Technology Co. Ltd., 3-20-12 Yushima, Bunkyo-ku, Tokyo 113-0034, Japan
| | - Toru Maekawa
- Bio-Nano Electronics Research Centre, Toyo University 2100, Kujirai, Kawagoe, Saitama 350-8585, Japan
- Graduate School of Interdisciplinary New Science, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585, Japan
| | - Akira Inoue
- Bio-Nano Electronics Research Centre, Toyo University 2100, Kujirai, Kawagoe, Saitama 350-8585, Japan
- Graduate School of Interdisciplinary New Science, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585, Japan
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60
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Duan WH, Wang Q, Collins F. Dispersion of carbon nanotubes with SDS surfactants: a study from a binding energy perspective. Chem Sci 2011. [DOI: 10.1039/c0sc00616e] [Citation(s) in RCA: 147] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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61
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Higashi T, Nakajima Y, Kojima M, Ishii K, Inoue A, Maekawa T, Hanajiri T. Effects of poly-l-tyrosine molecules decoration on the surface properties and electron transport of SWCNTs compared to the effects of DNA molecules. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2010.11.066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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62
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Nanomaterials in biological environment: a review of computer modelling studies. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2010; 40:103-15. [DOI: 10.1007/s00249-010-0651-6] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 11/18/2010] [Accepted: 11/23/2010] [Indexed: 01/13/2023]
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63
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Lin S, Blankschtein D. Role of the Bile Salt Surfactant Sodium Cholate in Enhancing the Aqueous Dispersion Stability of Single-Walled Carbon Nanotubes: A Molecular Dynamics Simulation Study. J Phys Chem B 2010; 114:15616-25. [DOI: 10.1021/jp1076406] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shangchao Lin
- Departments of Chemical Engineering and Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Daniel Blankschtein
- Departments of Chemical Engineering and Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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64
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Debouzy JC, Crouzier D, Flahaut E. Hydrophobic double walled carbon nanotubes interaction with phopholipidic model membranes: (1)H-, (2)H-, (31)P NMR and ESR study. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2010; 30:147-152. [PMID: 21787645 DOI: 10.1016/j.etap.2010.05.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Revised: 04/27/2010] [Accepted: 05/08/2010] [Indexed: 05/31/2023]
Abstract
The interactions of carbon nanotubes synthesized by catalytic chemical vapour deposition with phospholipidic bilayers, mimicking biological membranes, have been investigated using solid state (31)P- and (2)H NMR, (1)H- and (31)P NMR in liquids and ESR studies. It was found that carbon nanotubes can integrate the bilayer, depending on the overall cohesion of the membrane used. Whereas no direct interaction can be observed in small unilamellar vesicles or directly in the presence of short-chained phospholipids, carbon nanotubes incorporate into the membrane of multibilayers. The result is a significant 2-3K lowering of the transition temperature in multibilayers of dimyristoyl lecithins, which is more markedly associated with increased fluidity in the most superficial part of the membrane below the transition temperature (292-300K range). However, no ionophoric property was found on large unilamellar vesicles.
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Affiliation(s)
- J C Debouzy
- CRSSA, Département de Radiobiologie et de Biophysique, 24, Avenue des Maquis du Grésivaudan, 38702 La Tronche Cedex, France
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65
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Wallace EJ, Sansom MSP. Molecular Dynamics Studies of the Interactions Between Carbon Nanotubes and Biomembranes. MOLECULAR SIMULATIONS AND BIOMEMBRANES 2010. [DOI: 10.1039/9781849732154-00287] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Molecular simulations can be used to explore possible of bionanotechnology applications of biomembranes. In this chapter we review the use of both atomistic and coarse grained simulations to explore interactions between carbon nanotubes (CNTs) and model biomembranes. Issues of parameterization of CNTs for simulations are of especial importance, and are likely to be an area of future methodological refinement. Simulations have been used to characterize the interactions of CNTs with detergent and lipid molecules, and with model lipid bilayers. Once embedded within a bilayer, CNTs may form transbilayer pores. Simulations have been used to explore the behaviour of water and ions in CNT pores, and to explore their potential as ‘nanosyringes' for injection across cell membranes.
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Affiliation(s)
- E. Jayne Wallace
- Department of Biochemistry, University of Oxford Oxford OX1 3QU UK
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66
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Wallace EJ, D'Rozario RSG, Sanchez BM, Sansom MSP. A multiscale simulation study of carbon nanotube interactions with designed amphiphilic peptide helices. NANOSCALE 2010; 2:967-975. [PMID: 20648294 DOI: 10.1039/b9nr00355j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The dispersion and manipulation of carbon nanotubes (CNTs) are of great importance if we are to utilise the unique properties of CNTs in a range of biological, electrical and mechanical applications. Recently, a designed amphiphilic peptide helix termed nano-1 has been shown to solubilise CNTs in aqueous solution. Furthermore, the peptide is capable of assembling these coated tubes into fibres. We use a multiscale molecular dynamics approach to study the adsorption profile of nano-1 on a CNT surface. We find that nano-1 interacts with a CNT in a preferred orientation, such that its hydrophobic surface is in contact with the tube. The adsorption profile is unchanged upon increasing the number of peptides on the CNT. Interestingly, when few peptides are adsorbed onto the CNT surface we find that the secondary structure of the peptide is unstable. However, the helical secondary structure is stabilised upon increasing the number of peptides on the CNT surface. This study sheds light on the adsorption of peptides on CNTs, and may be exploitable to enhance the selective solubilisation and manipulation of CNTs.
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Affiliation(s)
- E Jayne Wallace
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
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67
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Chen X, Schluesener HJ. Multi-walled carbon nanotubes affect drug transport across cell membrane in rat astrocytes. NANOTECHNOLOGY 2010; 21:105104. [PMID: 20154379 DOI: 10.1088/0957-4484/21/10/105104] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The impact of carbon nanotubes on the cell membrane is an aspect of particular importance and interest in the study of carbon nanotubes' interactions with living systems. One of the many functions of the cell membrane is to execute substance transport into and out of the cell. We investigated the influence of multi-walled carbon nanotubes (MWCNTs) on the transport of several compounds across in the cell membrane of rat astrocytes using flow cytometry. These compounds are fluorescein diacetate, carboxyfluorescein diacetate, rhodamine 123 and doxorubicin, which are prosubstrate/substrates of multidrug transporter proteins. Results showed that MWCNTs significantly inhibited cellular uptake of doxorubicin but not the other drugs and the mode of loading made a significant difference in doxorubicin uptake. Retention of fluorescein, carboxyfluorescein and rhodamine 123 was remarkably higher in MWCNT-exposed cells after an efflux period. A kinetics study also demonstrated slower efflux of intracellular fluorescein and rhodamine 123. Data presented in this paper suggest that MWCNTs could affect drug transport across cell membranes. The implications of the findings are discussed.
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Affiliation(s)
- Xiao Chen
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, 430030 Wuhan, People's Republic of China.
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68
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Xu Z, Yang X, Yang Z. A molecular simulation probing of structure and interaction for supramolecular sodium dodecyl sulfate/single-wall carbon nanotube assemblies. NANO LETTERS 2010; 10:985-91. [PMID: 20121238 DOI: 10.1021/nl9041005] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Here we report a larger-scale atomic-level molecular dynamics (MD) simulation for the self-assembly of sodium dodecyl sulfate (SDS) surfactant on single-walled carbon nanotube (SWNT) surfaces and the interaction between supramolecular SDS/SWNT aggregates. We make an effort to address several important problems in regard to carbon nanotube dispersion/separation. At first, the simulation provides comprehensive direct evidence for SDS self-assembly structures on carbon nanotube surfaces, which can help to clarify the relevant debate over the exact adsorption structure. We also, for the first time, simulated the potential of mean force (PMF) between two SWNTs embedded in SDS surfactant micelles. A novel unified PMF approach has been applied to reveal various cooperative interactions between the SDS/SWNT aggregates, which is different from the previous electrostatic repulsion explanation. The unique role of sodium ions revealed here provides a new microscopic understanding of the recent experiments in the electrolyte tuning of the interfacial forces on the selective fractionation of SDS surrounding SWNTs.
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Affiliation(s)
- Zhijun Xu
- State Key Laboratory of Material-Orientated Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China
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69
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Abstract
We demonstrate by molecular dynamics simulations that graphene sheets could be hosted in the hydrophobic interior of biological membranes formed by amphiphilic phospholipid molecules. Our simulation shows that these hybrid graphene--membrane superstructures might be prepared by forming hydrated micelles of individual graphene flakes covered by phospholipids, which can be then fused with the membrane. Since the phospholipid layers of the membrane electrically isolate the embedded graphene from the external solution, the composite system might be used in the development of biosensors and bioelectronic materials.
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Affiliation(s)
- Alexey V Titov
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, USA
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70
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Angelikopoulos P, Bock H. The differences in surfactant adsorption on carbon nanotubes and their bundles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:899-907. [PMID: 19839636 DOI: 10.1021/la902376b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Dissipative particle dynamics simulations of a mesoscale model are performed to investigate the concentration dependence of surfactant adsorption on small-diameter carbon nanotubes and their bundles. Adsorption is found to follow fundamentally different mechanisms in the two cases because of the heterogeneity of the bundle surface and the difference in diameter of bundles compared to that of individual tubes. Whereas aggregation dominates adsorption on individual tubes, on bundles it is largely a Langmuir-type process. High adsorption energy sites on the outer surface of bundles, where surfactant molecules can interact with two tubes simultaneously, dominate at low coverage. They also cause adsorption on bundles to become significant well before adsorption on individual tubes starts. The difference in the adsorption mechanisms leads to a crossover point at higher concentrations, where the adsorbed amount per surface area on individual tubes becomes larger than that for the bundles.
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71
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Angelikopoulos P, Al Harthy S, Bock H. Structural Forces from Directed Self-Assembly. J Phys Chem B 2009; 113:13817-24. [DOI: 10.1021/jp903121a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
| | - Saud Al Harthy
- Department of Chemical Engineering, Heriot-Watt University, Edinburgh, EH14 4AS, Scotland, U.K
| | - Henry Bock
- Department of Chemical Engineering, Heriot-Watt University, Edinburgh, EH14 4AS, Scotland, U.K
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72
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D'Rozario RSG, Wee CL, Wallace EJ, Sansom MSP. The interaction of C60 and its derivatives with a lipid bilayer via molecular dynamics simulations. NANOTECHNOLOGY 2009; 20:115102. [PMID: 19420432 DOI: 10.1088/0957-4484/20/11/115102] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Coarse-grained molecular dynamics simulations have been used to explore the interactions of C(60) and its derivatives with lipid bilayers. Pristine C(60) partitions into the bilayer core, whilst C(60)(OH)(20) experiences a central energetic barrier to permeation across the bilayer. For intermediate levels of derivatization, e.g. C(60)(OH)(10), this central barrier is smaller and there is an energetic well at the bilayer/water interface, thus promoting entry into cells via bilayer permeation whilst maintaining solubility in water.
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