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Krasulina A, Myasnikova Y, Saik V, Predtechensky M, Smirnov SN. Improved Characterization of Aqueous Single-Walled Carbon Nanotube Dispersions Using Dynamic Light Scattering and Analytical Centrifuge Methods. ACS OMEGA 2023; 8:39233-39241. [PMID: 37901535 PMCID: PMC10600903 DOI: 10.1021/acsomega.3c04639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 10/04/2023] [Indexed: 10/31/2023]
Abstract
Aqueous dispersions of single-walled carbon nanotubes (SWCNTs) with a surfactant were studied by using a combination of differential sedimentation and dynamic light scattering methods. When applied to elongated particles like SWCNTs, the differential sedimentation method makes it possible to measure their diameters in dispersions, while the dynamic light scattering method allows to measure their lengths. Both methods have logarithmic dependence on the ratio between the length and diameter of the particles, and their simultaneous use improves the accuracy of measuring particles' dimensions. It was shown that sonication of dispersions leads not only to unbundling of agglomerates into individual nanotubes but also to a decrease in their lengths and the appearance of new defects detectable in increasing the D/G ratio in the Raman spectra. Unbundling into individual nanotubes occurs after exposure to 1 kWh/L energy density, and the single nanotube diameter with SDBS is ca. 3.3 nm larger than that of the naked nanotubes. Conductivity of thin SWCNT films made out of individual nanotubes demonstrates a power law dependence with the exponent close to the theoretical one for rigid rods.
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Affiliation(s)
- Anastasiya Krasulina
- OCSiAl, Group, 1, rue de la Poudrerie, 3364 Leudelange, Grand Duchy of Luxembourg
| | - Yuliya Myasnikova
- OCSiAl, Group, 1, rue de la Poudrerie, 3364 Leudelange, Grand Duchy of Luxembourg
| | - Vladimir Saik
- OCSiAl, Group, 1, rue de la Poudrerie, 3364 Leudelange, Grand Duchy of Luxembourg
| | | | - Sergei N. Smirnov
- OCSiAl, Group, 1, rue de la Poudrerie, 3364 Leudelange, Grand Duchy of Luxembourg
- Department
of Chemistry and Biochemistry, New Mexico
State University, Las Cruces, New Mexico 88003, United States
- NM
Devices, Las Cruces, New Mexico 88011, United States
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Tiwari P, Podleśny B, Krzywiecki M, Milowska KZ, Janas D. Understanding the partitioning behavior of single-walled carbon nanotubes using an aqueous two-phase extraction system composed of non-ionic surfactants and polymers. NANOSCALE HORIZONS 2023; 8:685-694. [PMID: 36919756 DOI: 10.1039/d3nh00023k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
In this work, a Pluronic/Dextran system was developed to discover the mechanism of the aqueous two-phase extraction (ATPE) technique, which is widely employed for the sorting of single-walled carbon nanotubes (SWCNTs) and other types of nanomaterials. The role of the phase-forming components and partitioning modulators was comprehensively investigated to gain greater insights into the differentiation process. The obtained results revealed that sodium dodecyl sulfate and sodium dodecylbenzene sulfonate operated as excellent partitioning modulators, enabling the diameter-based sorting of SWCNTs. Additionally, the data strongly suggested that different densities of various SWCNT species drove the movement of SWCNTs in the ATPE system. Consequently, the largest diameter SWCNTs were first influenced by surfactants and, thus, the nanotubes migrated towards a lower density top phase in the following order (7,5) > (8,3) > (6,5) > (6,4). Based on the in-depth analysis of the partitioning system, a mechanism was proposed that described the method in which the popular ATPE separation technique operates.
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Affiliation(s)
- Pranjala Tiwari
- Department of Chemistry, Silesian University of Technology, B. Krzywoustego 4, 44-100, Gliwice, Poland.
| | - Błażej Podleśny
- Department of Chemistry, Silesian University of Technology, B. Krzywoustego 4, 44-100, Gliwice, Poland.
| | - Maciej Krzywiecki
- Institute of Physics-CSE, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland
| | - Karolina Z Milowska
- CIC nanoGUNE, 20018 Donostia-San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
- TCM Group, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, UK
| | - Dawid Janas
- Department of Chemistry, Silesian University of Technology, B. Krzywoustego 4, 44-100, Gliwice, Poland.
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3
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The Effect of Elution Speed Control on Purity of Separated Large-Diameter Single-Walled Carbon Nanotubes in Gel Chromatography. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.08.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Polymethyl(1-Butyric acidyl)silane-Assisted Dispersion and Density Gradient Ultracentrifugation Separation of Single-Walled Carbon Nanotubes. NANOMATERIALS 2022; 12:nano12122094. [PMID: 35745430 PMCID: PMC9227055 DOI: 10.3390/nano12122094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/13/2022] [Accepted: 06/14/2022] [Indexed: 11/16/2022]
Abstract
Individual single–walled carbon nanotubes (SWNTs) with distinct electronic types are crucial for the fabrication of SWNTs–based electronic and magnetic devices. Herein, the water–soluble polymethyl(1–butyric acidyl)silane (BA–PMS) was synthesized via the hydrosilylation reaction between 3–butenoic acid and polymethylsilane catalyzed by 2,2′–azodibutyronitrile. As a new dispersant, BA–PMS displayed a quite good dispersing capacity to arc–discharged SWNTs and moderate selectivity for metallic species. The application of sucrose–DGU, the density gradient ultracentrifugation with sucrose as the gradient medium, to the co–surfactants (BA–PMS and sodium dodecyl sulfonate) individually dispersed SWNTs yielded metallic SWNTs of 85.6% purity and semiconducting SWNTs of 99% purity, respectively. This work paves a path to the DGU separation of the SWNTs dispersed by polymer–based dispersants with hydrophobic alkyl chains.
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Dyshin AA, Fomina NA, Aleshonkova AA, Kuzmikov MS, Bondarenko GV, Kiselev MG. Dispersion of Single-Walled Carbon Nanotubes in Ethanol–Cholic Acid Mixtures: Experiments and Molecular Dynamic Simulation. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s003602442206005x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Nanomaterial-aided seed regeneration in the global warming scenario: multiwalled carbon nanotubes, gold nanoparticles and heat-aged maize seeds. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-01804-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Changes in Electrical Conductance of Polymer Composites Melts Due to Carbon Nanofiller Particles Migration. Polymers (Basel) 2021; 13:polym13071030. [PMID: 33810308 PMCID: PMC8036904 DOI: 10.3390/polym13071030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 03/11/2021] [Accepted: 03/24/2021] [Indexed: 01/29/2023] Open
Abstract
In this work, the results of investigation of the effect of polymer composite melts electrical conductance increase with time are presented. The conductance time dependencies were obtained for composites based on polypropylene filled with carbon nanoparticles of different types. The dependencies were analyzed to demonstrate the possibility of correlation of the conductance kinetics with different composite parameters, such as the filler geometry. Additional studies were carried out, such as electron microscopy study, conductance measurements after consecutive surface layer removal, and composite melt conductance measurements using a three-electrode scheme. The results showed that the increased electrical conductance of the composite materials can be attributed to the formation of an enriched with the filler particles surface layer, which happens during the stay of the composite in a melt state. Analysis of the experimental data, along with the results of numerical modeling, allowed to suggest a possible filler distribution transformation scheme. The physical premises behind the investigated effect are discussed.
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A systematic investigation of dispersion concentration and particle size distribution of multi-wall carbon nanotubes in aqueous solutions of various dispersants. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124369] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Magnetic Materials and Systems: Domain Structure Visualization and Other Characterization Techniques for the Application in the Materials Science and Biomedicine. INORGANICS 2020. [DOI: 10.3390/inorganics8010006] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Magnetic structures have attracted a great interest due to their multiple applications, from physics to biomedicine. Several techniques are currently employed to investigate magnetic characteristics and other physicochemical properties of magnetic structures. The major objective of this review is to summarize the current knowledge on the usage, advances, advantages, and disadvantages of a large number of techniques that are currently available to characterize magnetic systems. The present review, aiming at helping in the choice of the most suitable method as appropriate, is divided into three sections dedicated to characterization techniques. Firstly, the magnetism and magnetization (hysteresis) techniques are introduced. Secondly, the visualization methods of the domain structures by means of different probes are illustrated. Lastly, the characterization of magnetic nanosystems in view of possible biomedical applications is discussed, including the exploitation of magnetism in imaging for cell tracking/visualization of pathological alterations in living systems (mainly by magnetic resonance imaging, MRI).
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Gillen AJ, Siefman DJ, Wu SJ, Bourmaud C, Lambert B, Boghossian AA. Templating colloidal sieves for tuning nanotube surface interactions and optical sensor responses. J Colloid Interface Sci 2019; 565:55-62. [PMID: 31931299 DOI: 10.1016/j.jcis.2019.12.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 12/11/2019] [Accepted: 12/15/2019] [Indexed: 12/15/2022]
Abstract
Surfactants offer a tunable approach for modulating the exposed surface area of a nanoparticle. They further present a scalable and cost-effective means for suspending single-walled carbon nanotubes (SWCNTs), which have demonstrated practical use as fluorescence sensors. Though surfactant suspensions show record quantum yields for SWCNTs in aqueous solutions, they lack the selectivity that is vital for optical sensing. We present a new method for controlling the selectivity of optical SWCNT sensors through colloidal templating of the exposed surface area. Colloidal nanotube sensors were obtained using various concentrations of sodium cholate, and their performances were compared to DNA-SWCNT optical sensors. Sensor responses were measured against a library of bioanalytes, including neurotransmitters, amino acids, and sugars. We report an intensity response towards dopamine and serotonin for all sodium cholate-suspended SWCNT concentrations. We further identify a selective, 14.1 nm and 10.3 nm wavelength red-shifting response to serotonin for SWCNTs suspended in 1.5 and 0.5 mM sodium cholate, respectively. Through controlled, adsorption-based tuning of the nanotube surface, this study demonstrates the applicability of sub-critical colloidal suspensions to achieve selectivities exceeding those previously reported for DNA-SWCNT sensors.
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Affiliation(s)
- Alice J Gillen
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Daniel J Siefman
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Institute of Physics (IPHYS), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Shang-Jung Wu
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Claire Bourmaud
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Benjamin Lambert
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
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11
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Silmore KS, Gong X, Strano MS, Swan JW. High-Resolution Nanoparticle Sizing with Maximum A Posteriori Nanoparticle Tracking Analysis. ACS NANO 2019; 13:3940-3952. [PMID: 30856320 DOI: 10.1021/acsnano.8b07215] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The rapid and efficient characterization of polydisperse nanoparticle dispersions remains a challenge within nanotechnology and biopharmaceuticals. Current methods for particle sizing, such as dynamic light scattering, analytical ultracentrifugation, and field-flow fractionation, can suffer from a combination of statistical biases, difficult sample preparation, insufficient sampling, and ill-posed data analysis. As an alternative, we introduce a Bayesian method that we call maximum a posteriori nanoparticle tracking analysis (MApNTA) for estimating the size distributions of nanoparticle samples from high-throughput single-particle tracking experiments. We derive unbiased statistical models for two observable quantities in a typical nanoparticle trajectory-the mean square displacement and the trajectory length-as a function of the particle size and calculate size distributions using maximum a posteriori (MAP) estimation with cross validation to mildly regularize solutions. We show that this approach infers nanoparticle size distributions with high resolution by performing extensive Brownian dynamics simulations and experiments with mono- and polydisperse solutions of gold nanoparticles as well as single-walled carbon nanotubes. We further demonstrate particular utility for characterizing minority components and impurity populations and highlight this ability with the identification of an impurity in a commercially produced gold nanoparticle sample. Modern algorithms such as MApNTA should find widespread use in the routine characterization of complex nanoparticle dispersions, allowing for significant advances in nanoparticle synthesis, separation, and functionalization.
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Affiliation(s)
- Kevin S Silmore
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Xun Gong
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Michael S Strano
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - James W Swan
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
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12
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Qiu S, Wu K, Gao B, Li L, Jin H, Li Q. Solution-Processing of High-Purity Semiconducting Single-Walled Carbon Nanotubes for Electronics Devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1800750. [PMID: 30062782 DOI: 10.1002/adma.201800750] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 04/14/2018] [Indexed: 06/08/2023]
Abstract
High-purity semiconducting single-walled carbon nanotubes (s-SWCNTs) are of paramount significance for the construction of next-generation electronics. Until now, a number of elaborate sorting and purification techniques for s-SWCNTs have been developed, among which solution-based sorting methods show unique merits in the scale production, high purity, and large-area film formation. Here, the recent progress in the solution processing of s-SWCNTs and their application in electronic devices is systematically reviewed. First, the solution-based sorting and purification of s-SWCNTs are described, and particular attention is paid to the recent advance in the conjugated polymer-based sorting strategy. Subsequently, the solution-based deposition and morphology control of a s-SWCNT thin film on a surface are introduced, which focus on the strategies for network formation and alignment of SWCNTs. Then, the recent advances in electronic devices based on s-SWCNTs are reviewed with emphasis on nanoscale s-SWCNTs' high-performance integrated circuits and s-SWCNT-based thin-film transistors (TFT) array and circuits. Lastly, the existing challenges and development trends for the s-SWCNTs and electronic devices are briefly discussed. The aim is to provide some useful information and inspiration for the sorting and purification of s-SWCNTs, as well as the construction of electronic devices with s-SWCNTs.
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Affiliation(s)
- Song Qiu
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Science, Suzhou, 215123, P.R. China
| | - Kunjie Wu
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Science, Suzhou, 215123, P.R. China
| | - Bing Gao
- School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, P.R. China
| | - Liqiang Li
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Science, Suzhou, 215123, P.R. China
| | - Hehua Jin
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Science, Suzhou, 215123, P.R. China
| | - Qingwen Li
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Science, Suzhou, 215123, P.R. China
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13
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Turek E, Shiraki T, Shiraishi T, Shiga T, Fujigaya T, Janas D. Single-step isolation of carbon nanotubes with narrow-band light emission characteristics. Sci Rep 2019; 9:535. [PMID: 30679809 PMCID: PMC6345979 DOI: 10.1038/s41598-018-37675-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 12/13/2018] [Indexed: 02/07/2023] Open
Abstract
Lack of necessary degree of control over carbon nanotube (CNT) structure has remained a major impediment factor for making significant advances using this material since it was discovered. Recently, a wide range of promising sorting methods emerged as an antidote to this problem, all of which unfortunately have a multistep nature. Here we report that desired type of CNTs can be targeted and isolated in a single step using modified aqueous two-phase extraction. We achieve this by introducing hydration modulating agents, which are able to tune the arrangement of surfactants on their surface, and hence make selected CNTs highly hydrophobic or hydrophilic. This allows for separation of minor chiral species from the CNT mixture with up to 99.7 ± 0.02% selectivity without the need to carry out any unnecessary iterations. Interestingly, our strategy is also able to enrich the optical emission from CNTs under selected conditions.
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Affiliation(s)
- Edyta Turek
- Department of Chemistry, Silesian University of Technology, B. Krzywoustego 4, 44-100, Gliwice, Poland
| | - Tomohiro Shiraki
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Tomonari Shiraishi
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Tamehito Shiga
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Tsuyohiko Fujigaya
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Dawid Janas
- Department of Chemistry, Silesian University of Technology, B. Krzywoustego 4, 44-100, Gliwice, Poland.
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14
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Zhou L, Liu X, Li H. Release of Retained Single-Walled Carbon Nanotubes in Gels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:12224-12232. [PMID: 30217110 DOI: 10.1021/acs.langmuir.8b02403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The separation of single-chirality, even-enantiomeric single-walled carbon nanotubes (SWCNTs) has been well established using gel permeation chromatography. Successful SWCNTs separation has been considered to be the selective adsorption and desorption of specific SWCNTs on the porous sites of Sephacryl gels. This work reports two nonspecific releases of SWCNTs retained on Sephacryl gels: (1) a considerable number of SWCNTs were eluted using a low-concentration SDS condition solution (0.5 wt %) from the gels exclusively eluted with a high-concentration SDS eluting solution (5 wt %) after being stocked overnight and (2) the retained SWCNTs in Sephacryl gels can be eluted using a low-concentration SDS condition solution (0.5 wt %) after being stocked overnight without any treatments. Inspired by extracellular matrix systems, these releases are attributed to the strain-induced gel relaxation. The roles of surfactants, especially SDS, in the retention and release of SWCNTs on Sephacryl gels were discussed on the basis of spectral dilution and titration experiments using single-chirality (6,5) SWCNT as the probe.
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Affiliation(s)
- Lili Zhou
- Atom Optoelectronics , 440 Hindry Avenue, Unit E , Inglewood , California 90301 , United States
| | - Xiaofeng Liu
- Atom Optoelectronics , 440 Hindry Avenue, Unit E , Inglewood , California 90301 , United States
| | - Huaping Li
- Atom Optoelectronics , 440 Hindry Avenue, Unit E , Inglewood , California 90301 , United States
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Aliyu A, Kariim I, Abdulkareem SA. Effects of aspect ratio of multi-walled carbon nanotubes on coal washery waste water treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 202:84-93. [PMID: 28728004 DOI: 10.1016/j.jenvman.2017.07.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 06/26/2017] [Accepted: 07/06/2017] [Indexed: 05/28/2023]
Abstract
The dependency of adsorption behaviour on the aspect ratio of multi-walled carbon nanotubes (MWCNTs) has been explored. In this study, effect of growth temperature on yield and aspect ratio of MWCNTs by catalytic chemical vapour deposition (CCVD) method is reported. The result revealed that yield and aspect ratio of synthesised MWCNTs strongly depend on the growth temperature during CCVD operation. The resulting MWCNTs were characterized by High Resolution Transmission Electron Microscope (HRTEM), Dynamic Light Scattering (DLS) and X-ray diffraction (XRD) techniques to determine it diameter, hydrodynamic diameter and crystallinity respectively. Aspect ratio and length of the grown MWCNTs were determined from the HRTEM images with the hydrodynamic diameter using the modified Navier-Stokes and Stokes-Einstein equations. The effect of the prepared MWCNTs dosage were investigated on the Turbidity, Iron (Fe) and Lead (Pb) removal efficiency of coal washery effluent. The MWCNTs with higher length (58.17 μm) and diameter (71 nm) tend to show high turbidity and Fe removal, while MWCNTs with lower length (38.87 μm) and diameter (45 nm) tend to show high removal of Pb. Hence, the growth temperature during CCVD operation shows a great effluence on the aspect ratio of MWCNTs which determines it area of applications.
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Affiliation(s)
- Ahmed Aliyu
- Department of Chemical Sciences, Federal University Wukari, P.M.B. 1020, Taraba State, Nigeria; Nanotechnology Research Group, Centre for Genetic Engineering and Biotechnology, Federal University of Technology Minna, P.M.B. 65, Minna, Niger State, Nigeria.
| | - Ishaq Kariim
- Department of Chemical Engineering, School of Engineering and Engineering Technology, Federal University of Technology Minna, P.M.B. 65, Minna, Niger State, Nigeria; Nanotechnology Research Group, Centre for Genetic Engineering and Biotechnology, Federal University of Technology Minna, P.M.B. 65, Minna, Niger State, Nigeria
| | - Saka Ambali Abdulkareem
- Department of Chemical Engineering, School of Engineering and Engineering Technology, Federal University of Technology Minna, P.M.B. 65, Minna, Niger State, Nigeria; Nanotechnology Research Group, Centre for Genetic Engineering and Biotechnology, Federal University of Technology Minna, P.M.B. 65, Minna, Niger State, Nigeria
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One-dimensional poly(L-lysine)-block-poly(L-threonine) assemblies exhibit potent anticancer activity by enhancing membranolysis. Acta Biomater 2017; 55:283-295. [PMID: 28412555 DOI: 10.1016/j.actbio.2017.04.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 04/10/2017] [Accepted: 04/10/2017] [Indexed: 12/19/2022]
Abstract
Herein, we report the oncolytic activity of cationic, one-dimensional (1D) fibril assemblies formed from coil-sheet poly(L-lysine)-block-poly(L-threonine) (PLL-b-PLT) block copolypeptides for cancer therapy. The 1D fibril assemblies can efficiently interact with negatively charged cellular and mitochondrial membranes via electrostatic interactions, leading to necrosis via membrane lysis and apoptosis via the mitochondria-lytic effect. The concept is analogous to that of 1D drug carriers that exhibit enhanced cell penetration. In comparison to free PLL chains, PLL-b-PLT fibril assemblies exhibit selective cytotoxicity toward cancer cells, low hemolysis activity, enhanced membranolytic activity, and a different apoptosis pathway, which may be due to differences in the peptide-membrane interactions. Antitumor studies using a metastatic LL2 lung carcinoma model indicate that the fibril assemblies significantly inhibited tumor growth, improved survival in tumor-bearing mice and suppressed lung metastasis without obvious body weight loss. An additive efficacy was also observed for treatment with both PLL-b-PLT and cisplatin. These results support the feasibility of using 1D fibril assemblies as potential apoptotic anticancer therapeutics. STATEMENT OF SIGNIFICANCE We report that cationic, one-dimensional (1D) fibril assemblies formed by coil-sheet poly(L-lysine)-block-poly(L-threonine) (PLL-b-PLT) block copolypeptides exhibited potent anticancer activity by enhancing membranolysis. The 1D fibril assemblies can efficiently interact with negatively charged cellular and mitochondrial membranes via electrostatic interactions, leading to necrosis via membrane lysis and apoptosis via mitochondria-lytic effect. Moreover, the fibril assemblies exhibited low hemolytic activity and selective cytotoxicity toward cancer cell, which is advantageous as compared to PLL and most antimicrobial/anticancerous peptides. This study provides a new concept of using cationic, 1D fibril assemblies for cancer therapy.
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Lin S, Shih CJ, Sresht V, Govind Rajan A, Strano MS, Blankschtein D. Understanding the colloidal dispersion stability of 1D and 2D materials: Perspectives from molecular simulations and theoretical modeling. Adv Colloid Interface Sci 2017; 244:36-53. [PMID: 27521100 DOI: 10.1016/j.cis.2016.07.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Revised: 07/27/2016] [Accepted: 07/27/2016] [Indexed: 01/14/2023]
Abstract
The colloidal dispersion stability of 1D and 2D materials in the liquid phase is critical for scalable nano-manufacturing, chemical modification, composites production, and deployment as conductive inks or nanofluids. Here, we review recent computational and theoretical studies carried out by our group to model the dispersion stability of 1D and 2D materials, including single-walled carbon nanotubes, graphene, and graphene oxide in aqueous surfactant solutions or organic solvents. All-atomistic (AA) molecular dynamics (MD) simulations can probe the molecular level details of the adsorption morphology of surfactants and solvents around these materials, as well as quantify the interaction energy between the nanomaterials mediated by surfactants or solvents. Utilizing concepts from reaction kinetics and diffusion, one can directly predict the rate constants for the aggregation kinetics and dispersion life times using MD outputs. Furthermore, the use of coarse-grained (CG) MD simulations allows quantitative prediction of surfactant adsorption isotherms. Combined with the Poisson-Boltzmann equation, the Langmuir isotherm, and the DLVO theory, one can directly use CGMD outputs to: (i) predict electrostatic potentials around the nanomaterial, (ii) correlate surfactant surface coverages with surfactant concentrations in the bulk dispersion medium, and (iii) determine energy barriers against coagulation. Finally, we discuss challenges associated with studying emerging 2D materials, such as, hexagonal boron nitride (h-BN), phosphorene, and transition metal dichalcogenides (TMDCs), including molybdenum disulfide (MoS2). An outlook is provided to address these challenges with plans to develop force-field parameters for MD simulations to enable predictive modeling of emerging 2D materials in the liquid phase.
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Affiliation(s)
- Shangchao Lin
- Department of Mechanical Engineering, Materials Science & Engineering Program, Florida State University, Tallahassee, FL 32310, United States
| | - Chih-Jen Shih
- Institute for Chemical and Bioengineering, ETH Zürich, Vladimir-Perlog-Weg 1, ETH Hönggerberg, HCI E137, CH-8093 Zürich, Switzerland
| | - Vishnu Sresht
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Ananth Govind Rajan
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Michael S Strano
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Daniel Blankschtein
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States.
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18
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Liu M, Huo Z, Liu T, Shen Y, He R, Zhou C. Self-Assembling Halloysite Nanotubes into Concentric Ring Patterns in a Sphere-on-Flat Geometry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3088-3098. [PMID: 28025883 DOI: 10.1021/acs.langmuir.6b04460] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Highly ordered and concentric ring patterns consisting of halloysite nanotubes (HNTs) with hierarchical cholesteric architectures are prepared by evaporation-induced self-assembly in a sphere-on-flat geometry. The structure and properties of HNTs are investigated. HNTs show a perfect tubular morphology on the nanoscale with high dispersion stability in water. Upon drying the HNTs aqueous suspension in a sphere-on-flat confined space, regular concentric HNTs rings are formed on the substrate via a self-assembly process. The widths of the inner and outer rings and the spacing between the adjacent rings increase with an increase in the concentration of the HNTs suspension. The highly ordered and concentric HNTs rings show a pronounced Maltese cross-like pattern under crossed polarizers, which suggests the formation of hierarchical cholesteric architectures. Scanning electron microscopy and atomic force microscopy observations show a disclination alignment of HNTs in the ring strips, especially with a high concentration of the HNTs suspension. The patterned rough surfaces of the HNTs show low cytotoxicity and can be used as a cell-supporting scaffold. The HNTs rings can guide the growth and orientation of C2C12 myoblast cells perpendicular to the rings. This work provides a simple, repeatable, mild, and high-efficiency method for obtaining HNTs with hierarchical architectures, which show potential for a large variety of applications, for example, in vascular grafts and skin regeneration.
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Affiliation(s)
- Mingxian Liu
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, PR China
| | - Zhuohao Huo
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, PR China
| | - Tengfei Liu
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, PR China
| | - Yan Shen
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, PR China
| | - Rui He
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, PR China
| | - Changren Zhou
- Department of Materials Science and Engineering, Jinan University , Guangzhou 510632, PR China
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19
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Synthesis and Characterization of Tri-metallic Fe–Co–Ni Catalyst Supported on
$$\hbox {CaCO}_{3}$$
CaCO
3
for Multi-Walled Carbon Nanotubes Growth via Chemical Vapor Deposition Technique. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2017. [DOI: 10.1007/s13369-017-2478-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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20
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Arbabi V, Pouran B, Weinans H, Zadpoor AA. Neutral solute transport across osteochondral interface: A finite element approach. J Biomech 2016; 49:3833-3839. [DOI: 10.1016/j.jbiomech.2016.10.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 10/10/2016] [Accepted: 10/11/2016] [Indexed: 10/20/2022]
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21
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Dyshin AA, Eliseeva OV, Bondarenko GV, Kolker AM, Kiselev MG. Dispersion of single-walled carbon nanotubes in dimethylacetamide and a dimethylacetamide–cholic acid mixture. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2016. [DOI: 10.1134/s0036024416120086] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Chen SJ, Qiu CY, Korayem AH, Barati MR, Duan WH. Agglomeration process of surfactant-dispersed carbon nanotubes in unstable dispersion: A two-stage agglomeration model and experimental evidence. POWDER TECHNOL 2016. [DOI: 10.1016/j.powtec.2016.06.033] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Pouran B, Arbabi V, Weinans H, Zadpoor AA. Application of multiphysics models to efficient design of experiments of solute transport across articular cartilage. Comput Biol Med 2016; 78:91-96. [PMID: 27673491 DOI: 10.1016/j.compbiomed.2016.09.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 08/23/2016] [Accepted: 09/16/2016] [Indexed: 11/25/2022]
Abstract
Transport of solutes helps to regulate normal physiology and proper function of cartilage in diarthrodial joints. Multiple studies have shown the effects of characteristic parameters such as concentration of proteoglycans and collagens and the orientation of collagen fibrils on the diffusion process. However, not much quantitative information and accurate models are available to help understand how the characteristics of the fluid surrounding articular cartilage influence the diffusion process. In this study, we used a combination of micro-computed tomography experiments and biphasic-solute finite element models to study the effects of three parameters of the overlying bath on the diffusion of neutral solutes across cartilage zones. Those parameters include bath size, degree of stirring of the bath, and the size and concentration of the stagnant layer that forms at the interface of cartilage and bath. Parametric studies determined the minimum of the finite bath size for which the diffusion behavior reduces to that of an infinite bath. Stirring of the bath proved to remarkably influence neutral solute transport across cartilage zones. The well-stirred condition was achieved only when the ratio of the diffusivity of bath to that of cartilage was greater than ≈1000. While the thickness of the stagnant layer at the cartilage-bath interface did not significantly influence the diffusion behavior, increase in its concentration substantially elevated solute concentration in cartilage. Sufficient stirring attenuated the effects of the stagnant layer. Our findings could be used for efficient design of experimental protocols aimed at understanding the transport of molecules across articular cartilage.
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Affiliation(s)
- Behdad Pouran
- Department of Orthopedics, UMC Utrecht, Heidelberglaan100, 3584CX Utrecht, The Netherlands; Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628CD Delft, The Netherlands.
| | - Vahid Arbabi
- Department of Orthopedics, UMC Utrecht, Heidelberglaan100, 3584CX Utrecht, The Netherlands; Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628CD Delft, The Netherlands; Department of Mechanical Engineering, University of Birjand, 61597175 Birjand, Iran
| | - Harrie Weinans
- Department of Orthopedics, UMC Utrecht, Heidelberglaan100, 3584CX Utrecht, The Netherlands; Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628CD Delft, The Netherlands; Department of Rheumatology, UMC Utrecht, Heidelberglaan100, 3584CX Utrecht, The Netherlands
| | - Amir A Zadpoor
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628CD Delft, The Netherlands
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24
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Jang M, Kim S, Jeong H, Ju SY. Affinity-mediated sorting order reversal of single-walled carbon nanotubes in density gradient ultracentrifugation. NANOTECHNOLOGY 2016; 27:41LT01. [PMID: 27595315 DOI: 10.1088/0957-4484/27/41/41lt01] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Sorted single-walled carbon nanotubes (SWNTs) are of paramount importance for their utilization in high-end optoelectronic applications. Sodium cholate (SC)-based density gradient ultracentrifugation (DGU) has been instrumental in isolating small diameter (d t) SWNTs. Here, we show that SWNTs wrapped by flavin mononucleotide (FMN) as a dispersing agent are sorted in DGU, and show sorting order reversal behavior, departing from prototypical SC-SWNT trends. Larger d t SWNTs are sorted in lower density (ρ), and buoyant ρ distribution of FMN-SWNT ranges from 1.15-1.25 g cm(-3). Such a nanotube layering pattern originates from both the binding affinity between FMN and SWNT and the less-susceptible hydrated volume of remote phosphate sidechains of FMN according to nanotube d t change.
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Affiliation(s)
- Myungsu Jang
- Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea
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25
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Arbabi V, Pouran B, Weinans H, Zadpoor AA. Combined inverse-forward artificial neural networks for fast and accurate estimation of the diffusion coefficients of cartilage based on multi-physics models. J Biomech 2016; 49:2799-2805. [DOI: 10.1016/j.jbiomech.2016.06.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 06/11/2016] [Accepted: 06/18/2016] [Indexed: 10/21/2022]
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26
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Li H, Zhou L. Visualizing Helical Wrapping of Semiconducting Single-Walled Carbon Nanotubes by Surfactants and Their Impacts on Electronic Properties. ChemistrySelect 2016. [DOI: 10.1002/slct.201601033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Huaping Li
- Chemelectronics LLC; 440 Hindry Avenue, Unit E Inglewood, California 90301 USA
| | - Lili Zhou
- Chemelectronics LLC; 440 Hindry Avenue, Unit E Inglewood, California 90301 USA
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27
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Johnson BR, Eldred TB, Nguyen AT, Payne WM, Schmidt EE, Alansari AY, Amburgey JE, Poler JC. High-Capacity and Rapid Removal of Refractory NOM Using Nanoscale Anion Exchange Resin. ACS APPLIED MATERIALS & INTERFACES 2016; 8:18540-18549. [PMID: 27348616 DOI: 10.1021/acsami.6b04368] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
As human health concerns over disinfection byproducts (DBP) in drinking water increase, so does the need to develop new materials that remove them rapidly and at high capacity. Ion exchange (IEX) is an effective method for the removal of natural organic matter (NOM), especially anion exchange resins (AERs) with quaternary ammonium functional groups. However, capacity is limited in existing commercial resin materials because adsorbates can only interact with the outermost surface area, which makes these products inefficient on a mass basis. We have synthesized a novel "NanoResin" exploiting the enhanced NOM removal of the quaternary ammonium resin while utilizing the vast surface area of SWCNTs, which act as scaffolding for the resin. Our nanomaterials show increased adsorption capacity compared to commercially available adsorbents, in a fraction of the time. This NanoResin requires only about 10 s to reach ion-exchange equilibrium. Comparatively, commercial AERs only achieved partial removal after more than 30 min. High capacity adsorption of a low molecular weight (MW) surrogate has been measured. NOM removal was demonstrated in solutions of both low and high specific UV absorbance (SUVA) composition with these nanomaterials. Additionally, the NanoResin showed enhanced removal of a NOM concentrate sample taken from Myrtle Beach, SC, demonstrating NanoResin is an effective method of removal for refractory NOM in a natural aqueous environment. Synthesis and characterization of the polymers and nanomaterials are presented below. Adsorption capacity, adsorption kinetics, and the regeneration and reusability of these new materials for NOM removal are described. The open matrix microstructure precludes any intraparticle diffusion of adsorbates; thus, these nanomaterials act as a "contact resin".
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Affiliation(s)
- Billy R Johnson
- Department of Chemistry and ‡Department of Civil and Environmental Engineering, University of North Carolina at Charlotte , Charlotte, North Carolina 28223, United States
| | - Tim B Eldred
- Department of Chemistry and ‡Department of Civil and Environmental Engineering, University of North Carolina at Charlotte , Charlotte, North Carolina 28223, United States
| | - Andy T Nguyen
- Department of Chemistry and ‡Department of Civil and Environmental Engineering, University of North Carolina at Charlotte , Charlotte, North Carolina 28223, United States
| | - William M Payne
- Department of Chemistry and ‡Department of Civil and Environmental Engineering, University of North Carolina at Charlotte , Charlotte, North Carolina 28223, United States
| | - Emily E Schmidt
- Department of Chemistry and ‡Department of Civil and Environmental Engineering, University of North Carolina at Charlotte , Charlotte, North Carolina 28223, United States
| | - Amir Y Alansari
- Department of Chemistry and ‡Department of Civil and Environmental Engineering, University of North Carolina at Charlotte , Charlotte, North Carolina 28223, United States
| | - James E Amburgey
- Department of Chemistry and ‡Department of Civil and Environmental Engineering, University of North Carolina at Charlotte , Charlotte, North Carolina 28223, United States
| | - Jordan C Poler
- Department of Chemistry and ‡Department of Civil and Environmental Engineering, University of North Carolina at Charlotte , Charlotte, North Carolina 28223, United States
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28
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Bhattacharjee S. DLS and zeta potential - What they are and what they are not? J Control Release 2016; 235:337-351. [PMID: 27297779 DOI: 10.1016/j.jconrel.2016.06.017] [Citation(s) in RCA: 1810] [Impact Index Per Article: 226.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 06/08/2016] [Accepted: 06/09/2016] [Indexed: 02/07/2023]
Abstract
Adequate characterization of NPs (nanoparticles) is of paramount importance to develop well defined nanoformulations of therapeutic relevance. Determination of particle size and surface charge of NPs are indispensable for proper characterization of NPs. DLS (dynamic light scattering) and ZP (zeta potential) measurements have gained popularity as simple, easy and reproducible tools to ascertain particle size and surface charge. Unfortunately, on practical grounds plenty of challenges exist regarding these two techniques including inadequate understanding of the operating principles and dealing with critical issues like sample preparation and interpretation of the data. As both DLS and ZP have emerged from the realms of physical colloid chemistry - it is difficult for researchers engaged in nanomedicine research to master these two techniques. Additionally, there is little literature available in drug delivery research which offers a simple, concise account on these techniques. This review tries to address this issue while providing the fundamental principles of these techniques, summarizing the core mathematical principles and offering practical guidelines on tackling commonly encountered problems while running DLS and ZP measurements. Finally, the review tries to analyze the relevance of these two techniques from translatory perspective.
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Affiliation(s)
- Sourav Bhattacharjee
- School of Veterinary Medicine, University College Dublin (UCD), Belfield, Dublin 4, Ireland.
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29
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Iso-acoustic focusing of cells for size-insensitive acousto-mechanical phenotyping. Nat Commun 2016; 7:11556. [PMID: 27180912 PMCID: PMC4873643 DOI: 10.1038/ncomms11556] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 04/07/2016] [Indexed: 02/08/2023] Open
Abstract
Mechanical phenotyping of single cells is an emerging tool for cell classification, enabling assessment of effective parameters relating to cells' interior molecular content and structure. Here, we present iso-acoustic focusing, an equilibrium method to analyze the effective acoustic impedance of single cells in continuous flow. While flowing through a microchannel, cells migrate sideways, influenced by an acoustic field, into streams of increasing acoustic impedance, until reaching their cell-type specific point of zero acoustic contrast. We establish an experimental procedure and provide theoretical justifications and models for iso-acoustic focusing. We describe a method for providing a suitable acoustic contrast gradient in a cell-friendly medium, and use acoustic forces to maintain that gradient in the presence of destabilizing forces. Applying this method we demonstrate iso-acoustic focusing of cell lines and leukocytes, showing that acoustic properties provide phenotypic information independent of size. Acoustophoresis, a method to manipulate individual cells based on their acoustic properties is confounded by a strong dependency on cell size. Here the authors present iso-acoustic focussing, a way to separate cells in a microfluidic chamber according to their effective acoustic impedance, independent of their size.
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30
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Lam S, Zheng M, Fagan JA. Characterizing the Effect of Salt and Surfactant Concentration on the Counterion Atmosphere around Surfactant Stabilized SWCNTs Using Analytical Ultracentrifugation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:3926-36. [PMID: 27031248 DOI: 10.1021/acs.langmuir.6b00605] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Accurate characterization of dispersed-phase nanoparticle properties such as density, size, solvation, and charge is necessary for their utilization in applications such as medicine, energy, and materials. Herein, analytical ultracentrifugation (AUC) is used to quantify bile salt surfactant adsorption on length sorted (7,6) single-wall carbon nanotubes (SWCNTs) as a function of bulk surfactant concentration and in the presence of varying quantities of a monovalent salt-sodium chloride. These measurements provide high precision adsorbed surfactant density values in the literature for only the second SWCNT structure to date and report the quantity of adsorbed surfactant across a broad range of bulk surfactant concentrations utilized in SWCNT dispersion processing. Second, the measurements presented herein unambiguously demonstrate, via AUC, a direct relation between the size of the counterion cloud around a surfactant-stabilized SWCNT and solution ionic strength. The results show that changes in the size of the counterion cloud around surfactant-stabilized SWCNT are attributable to electrostatic phenomenon and not to changes in the quantity of adsorbed surfactant with salt addition. These results provide important reference values for projecting SWCNT dispersion behavior as a function of solution conditions and extend the range of nanoparticle properties measurable via AUC.
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Affiliation(s)
- Stephanie Lam
- Materials Science and Engineering Division, National Institute of Standards and Technology , Gaithersburg, Maryland 20899, United States
| | - Ming Zheng
- Materials Science and Engineering Division, National Institute of Standards and Technology , Gaithersburg, Maryland 20899, United States
| | - Jeffrey A Fagan
- Materials Science and Engineering Division, National Institute of Standards and Technology , Gaithersburg, Maryland 20899, United States
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31
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Pectin-coated boron nitride nanotubes: In vitro cyto-/immune-compatibility on RAW 264.7 macrophages. Biochim Biophys Acta Gen Subj 2016; 1860:775-84. [DOI: 10.1016/j.bbagen.2016.01.020] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 01/11/2016] [Accepted: 01/24/2016] [Indexed: 11/23/2022]
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32
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Quantitative Myocardial Perfusion with Dynamic Contrast-Enhanced Imaging in MRI and CT: Theoretical Models and Current Implementation. BIOMED RESEARCH INTERNATIONAL 2016; 2016:1734190. [PMID: 27088083 PMCID: PMC4806267 DOI: 10.1155/2016/1734190] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 02/11/2016] [Indexed: 01/21/2023]
Abstract
Technological advances in magnetic resonance imaging (MRI) and computed tomography (CT), including higher spatial and temporal resolution, have made the prospect of performing absolute myocardial perfusion quantification possible, previously only achievable with positron emission tomography (PET). This could facilitate integration of myocardial perfusion biomarkers into the current workup for coronary artery disease (CAD), as MRI and CT systems are more widely available than PET scanners. Cardiac PET scanning remains expensive and is restricted by the requirement of a nearby cyclotron. Clinical evidence is needed to demonstrate that MRI and CT have similar accuracy for myocardial perfusion quantification as PET. However, lack of standardization of acquisition protocols and tracer kinetic model selection complicates comparison between different studies and modalities. The aim of this overview is to provide insight into the different tracer kinetic models for quantitative myocardial perfusion analysis and to address typical implementation issues in MRI and CT. We compare different models based on their theoretical derivations and present the respective consequences for MRI and CT acquisition parameters, highlighting the interplay between tracer kinetic modeling and acquisition settings.
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33
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Niskanen J, Zhang I, Xue Y, Golberg D, Maysinger D, Winnik FM. Boron nitride nanotubes as vehicles for intracellular delivery of fluorescent drugs and probes. Nanomedicine (Lond) 2016; 11:447-63. [PMID: 26891593 DOI: 10.2217/nnm.15.214] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
AIM To evaluate the response of cells to boron nitride nanotubes (BNNTs) carrying fluorescent probes or drugs in their inner channel by assessment of the cellular localization of the fluorescent cargo, evaluation of the in vitro release and biological activity of a drug (curcumin) loaded in BNNTs. METHODS Cells treated with curcumin-loaded BNNTs and stimulated with lipopolysaccharide were assessed for nitric oxide release and stimulation of IL-6 and TNF-α. The cellular trafficking of two cell-permeant dyes and a non-cell-permeant dye loaded within BNNTs was imaged. RESULTS BNNTs loaded with up to 13 wt% fluorophores were internalized by cells and controlled release of curcumin triggered cellular pathways associated with the known anti-inflammatory effects of the drug. CONCLUSION The overall findings indicate that BNNTs can function as nanocarriers of biologically relevant probes/drugs allowing one to examine/control their local intracellular localization and biochemical effects, leading the way to applications as intracellular nanosensors.
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Affiliation(s)
- Jukka Niskanen
- Université de Montréal, Faculté de Pharmacie et Département de Chimie, CP 6128 Succursale Centre Ville, Montréal, QC, H3C 3J7, Canada
| | - Issan Zhang
- Department of Pharmacology & Therapeutics, Faculty of Medicine, McGill University, 3655 Promenade Sir-William-Osler, H3G 1Y6, Montréal, Québec, Canada
| | - Yanming Xue
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Dmitri Golberg
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Dusica Maysinger
- Department of Pharmacology & Therapeutics, Faculty of Medicine, McGill University, 3655 Promenade Sir-William-Osler, H3G 1Y6, Montréal, Québec, Canada
| | - Françoise M Winnik
- Université de Montréal, Faculté de Pharmacie et Département de Chimie, CP 6128 Succursale Centre Ville, Montréal, QC, H3C 3J7, Canada.,International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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34
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Das SK, Sengupta S, Velarde L. Interfacial Surfactant Ordering in Thin Films of SDS-Encapsulated Single-Walled Carbon Nanotubes. J Phys Chem Lett 2016; 7:320-326. [PMID: 26730991 DOI: 10.1021/acs.jpclett.5b02633] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The molecular self-assembly of surfactants on the surface of single-walled carbon nanotubes (SWCNT) is currently a common strategy for the tuning of nanotube properties and the stabilization of carbon nanotube dispersions. Here, we report direct measurements of the degree of interfacial ordering for sodium dodecyl sulfate (SDS) surfactants adsorbed on colloidal, single-chirality enriched, SWCNTs within a solid film and investigate the dependence of surface alkyl chain order on the surfactant concentration in the precursor solution. The degree of order for the SWCNT-bound SDS molecules, is probed by vibrational sum frequency generation (VSFG) spectroscopy. We find concrete evidence for the presence of highly ordered surface structures at sufficiently high SDS concentrations, attributed here to cylindrical-like micelle assemblies with the SWCNT at the core. As the SDS concentration decreases, the interfacial order is found to decrease as well, generating a more disordered or random adsorption of surfactants on the nanotube surfaces.
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Affiliation(s)
- Sushanta K Das
- Department of Chemistry, ‡Department of Materials Design and Innovation, University at Buffalo, The State University of New York , Buffalo, New York 14260-3000, United States
| | - Sanghamitra Sengupta
- Department of Chemistry, ‡Department of Materials Design and Innovation, University at Buffalo, The State University of New York , Buffalo, New York 14260-3000, United States
| | - Luis Velarde
- Department of Chemistry, ‡Department of Materials Design and Innovation, University at Buffalo, The State University of New York , Buffalo, New York 14260-3000, United States
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35
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Vu Ngoc QB, Choi MS, Kim WJ. A simple quantitative estimate of the number of functional groups on the surfaces of single-walled carbon nanotubes. RSC Adv 2016. [DOI: 10.1039/c5ra24345a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We develop a quantitative analytical method to estimate the number of functional groups on single-walled carbon nanotube (SWNT) surfaces by simply measuring the Raman features of functionalized SWNTs.
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Affiliation(s)
- Quynh Bui Vu Ngoc
- Department of Chemical and Biological Engineering
- Gachon University
- Seongnam
- Korea
| | - Myung-Soo Choi
- Department of Chemical and Biological Engineering
- Gachon University
- Seongnam
- Korea
| | - Woo-Jae Kim
- Department of Chemical and Biological Engineering
- Gachon University
- Seongnam
- Korea
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36
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Devre RD, Budhlall BM, Barry CF. Enhancing the Colloidal Stability and Electrical Conductivity of Single-Walled Carbon Nanotubes Dispersed in Water. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500408] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rinky D. Devre
- Department of Plastics Engineering and NSF Center for High-Rate Nanomanufacturing; University of Massachusetts; Lowell MA 01854 USA
| | - Bridgette M. Budhlall
- Department of Plastics Engineering and NSF Center for High-Rate Nanomanufacturing; University of Massachusetts; Lowell MA 01854 USA
| | - Carol F. Barry
- Department of Plastics Engineering and NSF Center for High-Rate Nanomanufacturing; University of Massachusetts; Lowell MA 01854 USA
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37
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Cambré S, Muyshondt P, Federicci R, Wenseleers W. Chirality-dependent densities of carbon nanotubes by in situ 2D fluorescence-excitation and Raman characterisation in a density gradient after ultracentrifugation. NANOSCALE 2015; 7:20015-24. [PMID: 26565985 DOI: 10.1039/c5nr06020f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Density gradient ultracentrifugation (DGU) becomes increasingly important for the sorting of nanomaterials according to the particles' density, hence structure and dimensions, which determine their unique properties, but the further development of this separation technique is hindered by the limited precision with which the densities could be characterized. In this work, we determine these densities by position-dependent 2D wavelength-dependent IR fluorescence-excitation and resonant Raman spectroscopy measured directly in the density gradient after ultracentrifugation. We apply this method to study the diameter and chirality-dependent sorting of empty and water-filled single-walled carbon nanotubes coated with two different surfactants, sodium cholate (SC) and sodium deoxycholate (DOC). The results elucidate the long standing contradiction that SC would provide better diameter sorting, while DOC is the most efficient surfactant to solubilise the nanotubes. A more predictable separation is obtained for empty DOC-coated nanotubes since their density is found to vary very smoothly with diameter. The accurate and chirality-dependent densities furthermore provide information on the surfactant coating, which is also important for other separation techniques, and allow to determine the mass percentage of water encapsulated inside the nanotubes.
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Affiliation(s)
- Sofie Cambré
- Experimental Condensed Matter Physics Laboratory, Physics Department, University of Antwerp, Antwerp, Belgium.
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Zhu J, Kang J, Kang J, Jariwala D, Wood JD, Seo JWT, Chen KS, Marks TJ, Hersam MC. Solution-Processed Dielectrics Based on Thickness-Sorted Two-Dimensional Hexagonal Boron Nitride Nanosheets. NANO LETTERS 2015; 15:7029-7036. [PMID: 26348822 DOI: 10.1021/acs.nanolett.5b03075] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Gate dielectrics directly affect the mobility, hysteresis, power consumption, and other critical device metrics in high-performance nanoelectronics. With atomically flat and dangling bond-free surfaces, hexagonal boron nitride (h-BN) has emerged as an ideal dielectric for graphene and related two-dimensional semiconductors. While high-quality, atomically thin h-BN has been realized via micromechanical cleavage and chemical vapor deposition, existing liquid exfoliation methods lack sufficient control over h-BN thickness and large-area film quality, thus limiting its use in solution-processed electronics. Here, we employ isopycnic density gradient ultracentrifugation for the preparation of monodisperse, thickness-sorted h-BN inks, which are subsequently layer-by-layer assembled into ultrathin dielectrics with low leakage currents of 3 × 10(-9) A/cm(2) at 2 MV/cm and high capacitances of 245 nF/cm(2). The resulting solution-processed h-BN dielectric films enable the fabrication of graphene field-effect transistors with negligible hysteresis and high mobilities up to 7100 cm(2) V(-1) s(-1) at room temperature. These h-BN inks can also be used as coatings on conventional dielectrics to minimize the effects of underlying traps, resulting in improvements in overall device performance. Overall, this approach for producing and assembling h-BN dielectric inks holds significant promise for translating the superlative performance of two-dimensional heterostructure devices to large-area, solution-processed nanoelectronics.
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Affiliation(s)
- Jian Zhu
- Department of Materials Science and Engineering, ‡Graduate Program in Applied Physics, §Department of Chemistry, and ∥Department of Medicine, Northwestern University , Evanston, Illinois 60208, United States
| | - Joohoon Kang
- Department of Materials Science and Engineering, ‡Graduate Program in Applied Physics, §Department of Chemistry, and ∥Department of Medicine, Northwestern University , Evanston, Illinois 60208, United States
| | - Junmo Kang
- Department of Materials Science and Engineering, ‡Graduate Program in Applied Physics, §Department of Chemistry, and ∥Department of Medicine, Northwestern University , Evanston, Illinois 60208, United States
| | - Deep Jariwala
- Department of Materials Science and Engineering, ‡Graduate Program in Applied Physics, §Department of Chemistry, and ∥Department of Medicine, Northwestern University , Evanston, Illinois 60208, United States
| | - Joshua D Wood
- Department of Materials Science and Engineering, ‡Graduate Program in Applied Physics, §Department of Chemistry, and ∥Department of Medicine, Northwestern University , Evanston, Illinois 60208, United States
| | - Jung-Woo T Seo
- Department of Materials Science and Engineering, ‡Graduate Program in Applied Physics, §Department of Chemistry, and ∥Department of Medicine, Northwestern University , Evanston, Illinois 60208, United States
| | - Kan-Sheng Chen
- Department of Materials Science and Engineering, ‡Graduate Program in Applied Physics, §Department of Chemistry, and ∥Department of Medicine, Northwestern University , Evanston, Illinois 60208, United States
| | - Tobin J Marks
- Department of Materials Science and Engineering, ‡Graduate Program in Applied Physics, §Department of Chemistry, and ∥Department of Medicine, Northwestern University , Evanston, Illinois 60208, United States
| | - Mark C Hersam
- Department of Materials Science and Engineering, ‡Graduate Program in Applied Physics, §Department of Chemistry, and ∥Department of Medicine, Northwestern University , Evanston, Illinois 60208, United States
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Fernandes RMF, Abreu B, Claro B, Buzaglo M, Regev O, Furó I, Marques EF. Dispersing Carbon Nanotubes with Ionic Surfactants under Controlled Conditions: Comparisons and Insight. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:10955-65. [PMID: 26390187 DOI: 10.1021/acs.langmuir.5b02050] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A fundamental understanding of the mechanisms involved in the surfactant-assisted exfoliation and dispersion of carbon nanotubes (CNTs) in water calls for well-controlled experimental methodologies and reliable comparative metrics. We have assessed the ability of several ionic surfactants to disperse single and multiwalled carbon nanotubes, resorting to a stringently controlled sonication-centrifugation method for the preparation of the dispersions. The CNT concentration was accurately measured for a wide range of surfactant concentration, using combined thermogravimetric analysis and UV-vis spectroscopy. The obtained dispersibility curves yield several quantitative parameters, which in turn allow for the effects of nanotube morphology and surfactant properties (aromatic rings, chain length, headgroup charge, and cmc) to be assessed and rationalized, both in terms of dispersed nanotube mass and surface area. The data also indicate that the CNT-surfactant association follows patterns that are markedly different from other equilibrium processes governed by hydrophobicity (such as micellization); in particular, the surfactant concentration needed for maximum dispersibility, c(s,max), and the number of surfactant molecules per unit CNT area at c(s,max) are shown to depend linearly on chain length. The results further suggest that the presence of micelles in the exfoliation process is not a key factor either for starting CNT dispersibility or attaining its saturation value.
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Affiliation(s)
- Ricardo M F Fernandes
- Centro de Investigação em Química, Department of Chemistry and Biochemistry, Faculty of Science, University of Porto , Rua do Campo Alegre, s/n, P-4169-007 Porto, Portugal
- Division of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology , SE-10044 Stockholm, Sweden
| | - Bárbara Abreu
- Centro de Investigação em Química, Department of Chemistry and Biochemistry, Faculty of Science, University of Porto , Rua do Campo Alegre, s/n, P-4169-007 Porto, Portugal
| | - Bárbara Claro
- Centro de Investigação em Química, Department of Chemistry and Biochemistry, Faculty of Science, University of Porto , Rua do Campo Alegre, s/n, P-4169-007 Porto, Portugal
| | | | | | - István Furó
- Division of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology , SE-10044 Stockholm, Sweden
| | - Eduardo F Marques
- Centro de Investigação em Química, Department of Chemistry and Biochemistry, Faculty of Science, University of Porto , Rua do Campo Alegre, s/n, P-4169-007 Porto, Portugal
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Arbabi V, Pouran B, Weinans H, Zadpoor AA. Transport of Neutral Solute Across Articular Cartilage: The Role of Zonal Diffusivities. J Biomech Eng 2015; 137:2210662. [DOI: 10.1115/1.4030070] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Indexed: 02/02/2023]
Abstract
Transport of solutes through diffusion is an important metabolic mechanism for the avascular cartilage tissue. Three types of interconnected physical phenomena, namely mechanical, electrical, and chemical, are all involved in the physics of transport in cartilage. In this study, we use a carefully designed experimental-computational setup to separate the effects of mechanical and chemical factors from those of electrical charges. Axial diffusion of a neutral solute (Iodixanol) into cartilage was monitored using calibrated microcomputed tomography (micro-CT) images for up to 48 hr. A biphasic-solute computational model was fitted to the experimental data to determine the diffusion coefficients of cartilage. Cartilage was modeled either using one single diffusion coefficient (single-zone model) or using three diffusion coefficients corresponding to superficial, middle, and deep cartilage zones (multizone model). It was observed that the single-zone model cannot capture the entire concentration-time curve and under-predicts the near-equilibrium concentration values, whereas the multizone model could very well match the experimental data. The diffusion coefficient of the superficial zone was found to be at least one order of magnitude larger than that of the middle zone. Since neutral solutes were used, glycosaminoglycan (GAG) content cannot be the primary reason behind such large differences between the diffusion coefficients of the different cartilage zones. It is therefore concluded that other features of the different cartilage zones such as water content and the organization (orientation) of collagen fibers may be enough to cause large differences in diffusion coefficients through the cartilage thickness.
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Affiliation(s)
- V. Arbabi
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, Delft 2628CD, The Netherlands e-mail:
| | - B. Pouran
- Department of Orthopedics, UMC Utrecht, Heidelberglaan 100, Utrecht 3584CX, The Netherlands
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, Delft 2628CD, The Netherlands
| | - H. Weinans
- Department of Orthopedics and Department of Rheumatology, UMC Utrecht, Heidelberglaan 100, Utrecht 3584CX, The Netherlands
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628CD, Delft, The Netherlands
| | - A. A. Zadpoor
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, Delft 2628CD, The Netherlands
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Salvetti A, Rossi L, Iacopetti P, Li X, Nitti S, Pellegrino T, Mattoli V, Golberg D, Ciofani G. In vivo biocompatibility of boron nitride nanotubes: effects on stem cell biology and tissue regeneration in planarians. Nanomedicine (Lond) 2015; 10:1911-22. [PMID: 25835434 DOI: 10.2217/nnm.15.46] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
AIM Boron nitride nanotubes (BNNTs) represent an extremely interesting class of nanomaterials, and recent findings have suggested a number of applications in the biomedical field. Anyhow, extensive biocompatibility investigations are mandatory before any further advancement toward preclinical testing. MATERIALS & METHODS Here, we report on the effects of multiwalled BNNTs in freshwater planarians, one of the best-characterized in vivo models for developmental biology and regeneration research. RESULTS & DISCUSSION Obtained results indicate that BNNTs are biocompatible in the investigated model, since they do not induce oxidative DNA damage and apoptosis, and do not show adverse effects on planarian stem cell biology and on de novo tissue regeneration. In summary, collected findings represent another important step toward BNNT realistic applications in nanomedicine.
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Affiliation(s)
- Alessandra Salvetti
- Department of Clinical & Experimental Medicine, University of Pisa, Via Alessandro Volta 4, 56126 Pisa, Italy
| | - Leonardo Rossi
- Department of Clinical & Experimental Medicine, University of Pisa, Via Alessandro Volta 4, 56126 Pisa, Italy
| | - Paola Iacopetti
- Department of Clinical & Experimental Medicine, University of Pisa, Via Alessandro Volta 4, 56126 Pisa, Italy
| | - Xia Li
- National Institute for Materials Science (NIMS), International Center for Materials Nanoarchitectonics (MANA), Namiki 1-1, 305-0044 Tsukuba (Ibaraki), Japan
| | - Simone Nitti
- Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | | | - Virgilio Mattoli
- Istituto Italiano di Tecnologia, Center for Micro-BioRobotics @SSSA, Viale Rinaldo Piaggio 34, 56025 Pontedera (Pisa), Italy
| | - Dmitri Golberg
- National Institute for Materials Science (NIMS), International Center for Materials Nanoarchitectonics (MANA), Namiki 1-1, 305-0044 Tsukuba (Ibaraki), Japan
| | - Gianni Ciofani
- Istituto Italiano di Tecnologia, Center for Micro-BioRobotics @SSSA, Viale Rinaldo Piaggio 34, 56025 Pontedera (Pisa), Italy
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42
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Ferreira TH, Rocca A, Marino A, Mattoli V, de Sousa EMB, Ciofani G. Evaluation of the effects of boron nitride nanotubes functionalized with gum arabic on the differentiation of rat mesenchymal stem cells. RSC Adv 2015. [DOI: 10.1039/c5ra05091j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The biocompatibility of boron nitride nanotubes with rat mesenchymal stem cells has been evaluated in terms of cell proliferation and differentiation.
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Affiliation(s)
- Tiago H. Ferreira
- SENAN
- Centro de Desenvolvimento da Tecnologia Nuclear
- CDTN/CNEN
- 30270-901 Belo Horizonte
- Brazil
| | - Antonella Rocca
- Center for Micro-BioRobotics @SSSA
- Istituto Italiano di Tecnologia
- 56025 Pontedera
- Italy
- The BioRobotics Institute
| | - Attilio Marino
- Center for Micro-BioRobotics @SSSA
- Istituto Italiano di Tecnologia
- 56025 Pontedera
- Italy
- The BioRobotics Institute
| | - Virgilio Mattoli
- Center for Micro-BioRobotics @SSSA
- Istituto Italiano di Tecnologia
- 56025 Pontedera
- Italy
| | - Edesia M. B. de Sousa
- SENAN
- Centro de Desenvolvimento da Tecnologia Nuclear
- CDTN/CNEN
- 30270-901 Belo Horizonte
- Brazil
| | - Gianni Ciofani
- Center for Micro-BioRobotics @SSSA
- Istituto Italiano di Tecnologia
- 56025 Pontedera
- Italy
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43
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Lee H. Dispersion and bilayer interaction of single-walled carbon nanotubes modulated by covalent and noncovalent PEGylation. MOLECULAR SIMULATION 2014. [DOI: 10.1080/08927022.2014.976638] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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44
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Ajmani GS, Abbott-Chalew T, Teychene B, Wang Y, Jacangelo JG, Huang H. Effect of hydrodynamic diameter on the sieving of waterborne carbon nanotubes by porous membranes. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2014.07.064] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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45
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Kim MJ, Kang J, Park M. Chirality-controlled growth of single-walled carbon nanotubes via nanotube cloning. Macromol Res 2014. [DOI: 10.1007/s13233-014-2150-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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46
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Jain RM, Tvrdy K, Han R, Ulissi Z, Strano MS. Quantitative theory of adsorptive separation for the electronic sorting of single-walled carbon nanotubes. ACS NANO 2014; 8:3367-3379. [PMID: 24606316 DOI: 10.1021/nn4058402] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Recently, several important advances in techniques for the separation of single-walled carbon nanotubes (SWNTs) by chiral index have been developed. These new methods allow for the separation of SWNTs through selective adsorption and desorption of different (n,m) chiral indices to and from a specific hydrogel. Our group has previously developed a kinetic model for the chiral elution order of separation; however, the underlying mechanism that allows for this separation remains unknown. In this work, we develop a quantitative theory that provides the first mechanistic insights for the separation order and binding kinetics of each SWNT chirality (n,m) based on the surfactant-induced, linear charge density, which we find ranges from 0.41 e(-)/nm for (7,3) SWNTs in 17 mM sodium dodecyl sulfate (SDS) to 3.32 e(-)/nm for (6,5) SWNTs in 105 mM SDS. Adsorption onto the hydrogel support is balanced by short-distance hard-surface and long-distance electrostatic repulsive SWNT/substrate forces, the latter of which we postulate is strongly dependent on surfactant concentration and ultimately leads to gel-based single-chirality semiconducting SWNT separation. These molecular-scale properties are derived using bulk-phase, forward adsorption rate constants for each SWNT chirality in accordance with our previously published model. The theory developed here quantitatively describes the experimental elution profiles of 15 unique SWNT chiralities as a function of anionic surfactant concentration between 17 and 105 mM, as well as phenomenological observations of the impact of varying preparatory conditions such as extent of ultrasonication and ultracentrifugation. We find that SWNT elution order and separation efficiency are primarily driven by the morphological change of SDS surfactant wrapping on the surface of the nanotube, mediated by SWNT chirality and the ionic strength of the surrounding medium. This work provides a foundational understanding for high-purity, preparative-scale separation of as-produced SWNT mixtures into isolated, single-chirality fractions.
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Affiliation(s)
- Rishabh M Jain
- Departments of Chemical Engineering and ‡Materials Science Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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47
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Yao Y, Luo S, Liu T. Determination of the Length, Diameter, Molecular Mass, Density and Surfactant Adsorption of SWCNTs in Dilute Dispersion by Intrinsic Viscosity, Sedimentation, and Diffusion Measurements. Macromolecules 2014. [DOI: 10.1021/ma5003497] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yanbo Yao
- High-Performance
Materials
Institute, FAMU-FSU College of Engineering, Florida State University, 2525 Pottsdamer Street, Tallahassee, Florida 32310, United States
| | - Sida Luo
- High-Performance
Materials
Institute, FAMU-FSU College of Engineering, Florida State University, 2525 Pottsdamer Street, Tallahassee, Florida 32310, United States
| | - Tao Liu
- High-Performance
Materials
Institute, FAMU-FSU College of Engineering, Florida State University, 2525 Pottsdamer Street, Tallahassee, Florida 32310, United States
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48
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Lau YTR, Yamaguchi M, Li X, Bando Y, Golberg D, Winnik FM. Length fractionation of boron nitride nanotubes using creamed oil-in-water emulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:1735-1740. [PMID: 24512303 DOI: 10.1021/la404961p] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The fractionation by length of multiwalled boron nitride nanotubes (BNNTs) was achieved by emulsification and creaming of an oil/water/surfactant mixture. The length separation is based on the fact that nanoparticle-coated oil droplets polydisperse in size move toward the upper surface or the bottom of an emulsified mixture depending on the density of the droplets, such that droplets of different sizes are located at different heights. By sampling heightwise an unstable hexane/water/Tween 20/BNNT (1-20 μm long) emulsion, we observed that the lengths of the BNNTs adsorbed on the droplets display a strong correlation with the droplets sizes, thus leading to selective separation of the BNNT lengths, as confirmed by dark-field optical imaging and dynamic light scattering. This method may potentially be extended to other high aspect ratio nanomaterials exhibiting emulsification properties similar to those of BNNTs.
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Affiliation(s)
- Yiu-Ting R Lau
- World Premier International (WPI) Research Center Initiative, International Center for Materials Nanoarchitectonics (MANA), and National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan
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Gubitosi M, Trillo JV, Alfaro Vargas A, Pavel NV, Gazzoli D, Sennato S, Jover A, Meijide F, Galantini L. Characterization of carbon nanotube dispersions in solutions of bile salts and derivatives containing aromatic substituents. J Phys Chem B 2014; 118:1012-21. [PMID: 24417378 DOI: 10.1021/jp407145t] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Bile salts (BS) are known to solubilize high weight fractions of carbon nanotubes (CNTs) in aqueous solutions. Here, the efficiency of derivatives of bile salts (BSDs) containing aromatic substituents in dispersing single-wall CNTs (SWCNTs) has been investigated in order to check whether the presence of aromatic residues, because of their affinity toward carbon nanotube surfaces, determines improvements of the BS dispersion efficiency (DE). Electric arc and CoMoCAT SWCNTs were analyzed. The results, reported for the two surfactant concentrations of 0.06 and 1.0 wt %, show that the DE of BSDs depends on the position, orientation, and structure of the introduced aromatic residues. In the case of the CoMoCAT SWCNTs, at low surfactant concentration a DE improvement is observed in BSDs where the aromatic residue is linked either to carbon 3, located on the rigid four-ring system, or to the side chain. For the latter, this improvement is also enhanced in double-charge derivatives and kept at high surfactant concentration. It was also observed that at low concentrations of surfactant, the DE values of BSs and BSDs are usually larger than those of the more conventional detergent sodium dodecylsulfate.
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Affiliation(s)
- Marta Gubitosi
- Dipartimento di Chimica, "Sapienza" Università di Roma , P. le A. Moro 5, 00185 Roma, Italy
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50
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Obitayo W, Luo S, Xiao Z, Liu T, Guan J. Gel electrophoresis and Raman mapping for determining the length distribution of SWCNTs. RSC Adv 2014. [DOI: 10.1039/c4ra05885b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple method (GEP-SRSPL) combines gel electrophoresis and simultaneous Raman scattering and photoluminescence spectroscopy for length distribution measurements of SWCNTs.
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Affiliation(s)
- Waris Obitayo
- High-Performance Materials Institute
- Florida State University
- Tallahassee, USA
| | - Sida Luo
- High-Performance Materials Institute
- Florida State University
- Tallahassee, USA
| | - Zhiwei Xiao
- High-Performance Materials Institute
- Florida State University
- Tallahassee, USA
| | - Tao Liu
- High-Performance Materials Institute
- Florida State University
- Tallahassee, USA
| | - Jingjiao Guan
- Department of Chemical and Biomedical Engineering
- FAMU-FSU College of Engineering
- Florida State University
- Tallahassee, USA
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