New developments in non-covalent surface modification, dispersion and electrophoretic deposition of carbon nanotubes

Ata, M.S.; Poon, R.; Syed, Aseeb M.; Milne, J.; Zhitomirsky, Igor

doi:10.1016/j.carbon.2018.01.066

Cited by 117 publications

(74 citation statements)

References 138 publications

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“…[ 58,66,69 ] Significant interest has been generated in the use of small organic dispersant molecules, such as organic dyes and commercial bile acids. [ 81,87 ] Aromatic dyes are known to interact with graphitic sidewalls of carbon nanotubes via π–π interactions. [ 48,50 ] The adsorption of bile acids is largely driven by the hydrophobic interactions of hydrophobic convex faces of steroid bile acid backbones with carbon nanotubes.…”

Section: Manganese Oxides and Compositesmentioning

confidence: 99%

“…Such interactions do not significantly change the electronic properties of carbon nanotubes. [ 87 ] Moreover, new strategies have been developed for the co‐dispersion of manganese oxides and carbon nanotubes using co‐dispersants. [ 61 ] The key aspect of the approach is the use of dispersant molecules, which adsorbed on materials of different types.…”

Section: Manganese Oxides and Compositesmentioning

confidence: 99%

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The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Chen

Sahu

et al. 2020

Advanced Energy Materials

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Pseudocapacitive materials are used for supercapacitor applications due to their exceptionally high capacitance and low cost. Good capacitive performance of the pseudocapacitive materials at high active mass loadings is vital for the development of the next generation of supercapacitor devices. This review describes recent advances in materials and nanotechnologies, which allows the development of advanced pseudocapacitive devices with high active mass. An important breakthrough is the discovery of novel dispersing and capping agents for the colloidal processing of nanoparticles. Particularly important are novel co‐dispersants that exhibit enhanced adsorption on materials of different types, such as inorganic nanoparticles, carbon nanotubes, and graphene. Conceptually new strategies are designed to fabricate coated particles. Recent innovations pave the way for the development of multifunctional redox‐active dopants‐dispersants and dopants‐oxidants to manufacture conductive polymer composites. Among the most important advances in nanotechnology is the development of template methods and heterocoagulation techniques for composite manufacturing. The progress in the design of novel surface modification techniques and materials, discovery of advanced anchoring groups, and development of liquid–liquid extraction allows agglomerate‐free processing of nanomaterials and composites. This review describes fundamental aspects of novel technologies and their applications in the manufacturing of pseudocapacitive devices for energy storage.

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Section: Manganese Oxides and Compositesmentioning

confidence: 99%

Section: Manganese Oxides and Compositesmentioning

confidence: 99%

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Chen

Sahu

et al. 2020

Advanced Energy Materials

Self Cite

188

128

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“…Being part of the family of bile acid salts, it is composed of a steroid nucleus consisting of three six-membered and one five-membered hydrocarbon rings and a short hydrocarbon tail bearing COOgroup ( figure 1(B)). The adsorption of DCAS molecules over the CNO backbone is driven by hydrophobic interactions between the steroid backbones of the surfactant and the carbon network [25].…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, our results show a superior dispersing capability and excellent stability of the colloidal CNO dispersions provided by DCAS and SDBS, with the latter exhibiting slightly better performance. As it has been suggested that anionic surfactants would adsorb to negatively charged surfaces more strongly than cationic ones [29], this behavior can be assigned to the stronger hydrophobic interactions established between the CNO surface and the DCAS steroid backbone [25] or the SDBS alkyl chain tails [28], which lead to a higher adsoption and thus higher CNO surface coverage of the negatively charged surfactants. In addition, the polar head groups of the different surfactants play an important role in the water dispersion process.…”

Section: Resultsmentioning

confidence: 99%

“…Due to their commercial availability, low cost, and easy modification approaches, surfactants have a long and successful history as dispersing agents for CNMs such as CNTs [20][21][22][23]. In general, amphiphilic surfactants exhibit hydrophobic tail groups that interact with the hydrophobic graphitic surface of the CNMs, and hydrophilic head groups that, exposed to the aqueous environment, promote the material dispersion [24,25]. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.…”

Section: Introductionmentioning

confidence: 99%

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Surfactant-mediated dispersions of carbon nano-onions in aqueous solution

Camisasca

Giordani

2020

Nano Ex.

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In this work, we investigate the ability of different surfactants to form homogeneous and stable dispersions of carbon nano-onions (CNOs) in water via non-covalent interactions. For our purposes, we select three ionic surfactants, namely the cationic hexadecyltrimethylammonium bromide (CTAB) and the two anionic deoxycholic acid sodium salt (DCAS) and sodium dodecylbenzenesulfonate (SDBS). We examine the dispersing efficacy at dispersing CNOs and long-term stability by UV-vis absorption spectroscopy, dynamic light scattering and zeta-potential. Among the three surfactants, the anionic surfactants show the best ability to create stable CNO dispersions, with SDBS exhibiting superior efficacy. Our non-covalent strategy provides a valuable approach to enhance the solubility features while preserving the unique properties of CNOs.

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Multifunctional Properties of Commercial Bile Salts for Advanced Materials Engineering

et al. 2021

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Applications of bile acids (BAs) and bile salts (BSs) in the nanotechnology of functional materials are described. The exceptionally strong solubilization and dispersion power of BAs/BSs is a key factor for the solubilization of dyes, drugs, and polymers for electronic, optical, and biomedical devices, fabrication of composites, based on carbon nanotubes, graphene, diamonds, quantum dots, and polymers for applications in energy storage devices, coatings for corrosion protection of metals, sensors and electronic devices. BAs/BSs have attracted attention for synthesis, design, and surface modification of advanced materials. BAs/BSs are used as reducing, capping, chelating and dispersing agents for the synthesis of nanoparticles of metals and alloys, and low temperature synthesis of stoichiometric nanostructured complex oxides. BAs/BSs exhibit unique selfassembly properties, which are successfully used for the template synthesis of functional nanoparticles of controlled shapes. Particularly important are applications of BAs/BSs in the fabrication of dye sensitized solar cells with enhanced efficiency. Electrochemical strategies are discovered for the deposition of BA films and composites. Of particular interest are the unique gel-forming properties of BAs/BSs, which provide a basis for the synthesis of nanoparticles of controlled size and fabrication of novel materials with advanced functionality.

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New developments in non-covalent surface modification, dispersion and electrophoretic deposition of carbon nanotubes

Cited by 117 publications

References 138 publications

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Surfactant-mediated dispersions of carbon nano-onions in aqueous solution

Multifunctional Properties of Commercial Bile Salts for Advanced Materials Engineering

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