The Quarter-Century Anniversary of Carbon Nanotube Research

Li, Yan

doi:10.1021/acsnano.7b00232

Cited by 26 publications

(22 citation statements)

References 24 publications

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“…[1][2][3][4] After decades of research and development, CNTs can now be produced on bulk scale. [5][6][7] Mass-produced CNTs are typically available as powders of aggregated bundles that need to be first debundled and dispersed before their use. Unfortunately, most common solvents cannot dissolve or disperse unfunctionalized CNTs directly.…”

Section: Introductionmentioning

confidence: 99%

Cresol-Carbon Nanotube Charge-Transfer Complex: Stability in Common Solvents and Implications for Solution Processing

Chiou

Huang

2020

Matter

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The charge-transfer complex between cresol molecules and carbon nanotubes is confirmed by 1 H-nuclear magnetic resonance, Raman, and Fourier transform infrared spectroscopic studies. The stability of the cresol-nanotube complex in common solvents is determined by their dielectric constants. In solvents with high dielectric constants (>15), this non-covalent interaction is screened and the complex is destabilized, resulting in nanotube aggregation. In solvents with low dielectric constant (<10), the complex remains stable and the nanotubes are well dispersed. Therefore, using cresols as a minority cosolvent, surfactant-free dispersion of unfunctionalized single-walled and multi-walled carbon nanotubes in common industrial solvents can be achieved. This cosolvent strategy makes it possible to customize nanotube formulations in volatile industrial solvents for high-throughput solution-processing techniques, such as airbrushing. On the other hand, since highdielectric-constant solvents, such as acetone, can destabilize the cresol-nanotube complex, they can be used for the benefit of removing any residual cresols without heating, resulting in clean carbon nanotube films.

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Section: Introductionmentioning

confidence: 99%

Cresol-Carbon Nanotube Charge-Transfer Complex: Stability in Common Solvents and Implications for Solution Processing

Chiou

Huang

2020

Matter

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“…4F. Blade coating is commonly used to make electrodes for energy storage devices from slurries, which often use CNTs as conductive binder for active materials (8). Highly cohesive, additive-free pastes with well-dispersed nanotubes are readily compatible with these slurry-processing techniques and could directly benefit this large-scale application of CNTs.…”

Section: Significancementioning

confidence: 99%

“…cresol | carbon nanotubes | dough | solution processing | viscoelasticity C arbon nanotubes (CNTs) have been found to be attractive for applications due to their excellent electrical, thermal, and mechanical properties (1)(2)(3)(4)(5). Some types of nanotubes are already mass-manufactured in the ton scale in the form of powders (3,(6)(7)(8). As with other industrial materials, powders are often used with solvents during processing, such as in the forms of dispersions, pastes, gels, or doughs, so that they can be made into the desirable geometries and structures (9).…”

mentioning

confidence: 99%

Additive-free carbon nanotube dispersions, pastes, gels, and doughs in cresols

Chiou

Byun

Kim

et al. 2018

Proc. Natl. Acad. Sci. U.S.A.

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Cresols are a group of naturally occurring and massively produced methylphenols with broad use in the chemical industry. Here, we report that -cresol and its liquid mixtures with other isomers are surprisingly good solvents for processing carbon nanotubes. They can disperse carbon nanotubes of various types at unprecedentedly high concentrations of tens of weight percent, without the need for any dispersing agent or additive. Cresols interact with carbon nanotubes by charge transfer through the phenolic hydroxyl proton and can be removed after processing by evaporation or washing, without altering the surface of carbon nanotubes. Cresol solvents render carbon nanotubes polymer-like rheological and viscoelastic properties and processability. As the concentration of nanotubes increases, a continuous transition of four states can be observed, including dilute dispersion, thick paste, free-standing gel, and eventually a kneadable, playdough-like material. As demonstrated with a few proofs of concept, cresols make powders of agglomerated carbon nanotubes immediately usable by a broad array of material-processing techniques to create desirable structures and form factors and make their polymer composites.

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“…Уже более 30 лет углеродные нанотрубки (УНТ) и их разнообразные и уникальные физико-химические свойства активно изучаются учеными со всего мира. Эти новые материалы можно использовать в различных гибких и поддающихся механическому растяжению устройствах, включая аккумуляторы и конденсаторы, солнечные элементы, сенсоры, тонкопленочные транзисторы, дисплеи и многое другое [1][2][3]. Вследствие высокого аспектного отношения материалы, образованные УНТ, могут иметь различную структурную организацию как по диаметру и/или хиральности нанотрубок (величине их разброса), так и по их упорядоченности (от материалов с произвольной плотностью и ориентацией нанотрубок до волокон и упорядоченных массивов УНТ) [1][2][3].…”

Section: Introductionunclassified

“…Эти новые материалы можно использовать в различных гибких и поддающихся механическому растяжению устройствах, включая аккумуляторы и конденсаторы, солнечные элементы, сенсоры, тонкопленочные транзисторы, дисплеи и многое другое [1][2][3]. Вследствие высокого аспектного отношения материалы, образованные УНТ, могут иметь различную структурную организацию как по диаметру и/или хиральности нанотрубок (величине их разброса), так и по их упорядоченности (от материалов с произвольной плотностью и ориентацией нанотрубок до волокон и упорядоченных массивов УНТ) [1][2][3]. В частности, наиболее разупорядоченные материалы, образованные УНТ самых разных диаметров и хиральностей, производятся в форме порошков и используются для усиления композитных материалов, изготовления литий-ионных батарей, проводящих чернил и тонкопленочных транзисторов для гибких электронных устройств, а также при разработке технологий защиты от электромагнитного излучения [4].…”

Section: Introductionunclassified

Особенности углеродных нанотрубок, синтезированных из метана и ацетилена при использовании катализатора FeCl-=SUB=-3-=/SUB=-

Редина¹,

Авраменко²,

Лянгузов³

2021

Журнал Технической Физики

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The structural peculiarities of carbon nanotubes synthesized at the same experimental setup by means of catalytic chemical vapor deposition using two different carbon precursors and FeCl3 catalyst are compared. Methane and acetylene have been used as carbon precursors. FeCl3 has been deposited onto a substrate by means of drying of a droplet of its water solution. The influence of temperature and pressure variations on synthesis process has been investigated. The samples obtained have been studied by means of scanning electron microscopy and Raman spectroscopy. The nonlinear relation between synthesis temperature and defectiveness of synthesized carbon nanotubes has been found. The influence of carbon precursor type on morphology of the synthesized samples of carbon nanotubes has been demonstrated.

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The Quarter-Century Anniversary of Carbon Nanotube Research

Cited by 26 publications

References 24 publications

Cresol-Carbon Nanotube Charge-Transfer Complex: Stability in Common Solvents and Implications for Solution Processing

Cresol-Carbon Nanotube Charge-Transfer Complex: Stability in Common Solvents and Implications for Solution Processing

Additive-free carbon nanotube dispersions, pastes, gels, and doughs in cresols

Особенности углеродных нанотрубок, синтезированных из метана и ацетилена при использовании катализатора FeCl-=SUB=-3-=/SUB=-

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