Centrifugal purification of chemically modified single-walled carbon nanotubes

Jia, Hongbing; Lian, Yongfu; Ishitsuka, Midori O.; Nakahodo, Tsukasa; Maeda, Yutaka; Tsuchiya, Takahiro; Wakahara, Takatsugu; Akasaka, Takeshi

doi:10.1016/j.stam.2005.08.004

Cited by 39 publications

(18 citation statements)

References 33 publications

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“…Additionally, other methods, including different chromatography methods [44][45][46] and centrifugation methods [47,48], were also demonstrated to be very useful for the purification of carbon nanotubes. For example, Haddon's group at UC Riverside discovered that ultracentrifugation at different speeds can be a very effective method for the purification of SWNTs made by the arc method [47].…”

Section: Wet Methodsmentioning

confidence: 99%

Carbon Nanotube Synthesis and Organization

Joselevich

Dai

Liu

et al. 2007

Topics in Applied Physics

122

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Abstract. The synthesis, sorting and organization of carbon nanotubes are major challenges toward future applications. This chapter reviews recent advances in these topics, addressing both the bulk production and processing of carbon nanotubes, and their organization into ordered structures, such as fibers, and aligned arrays on surfaces. The bulk synthetic methods are reviewed with emphasis on the current advances toward mass production and selective synthesis. New approaches for the sorting of carbon nanotubes by structure and properties are described in the context of the specific physical or chemical interactions at play, and referring to the characterization methods described in the contribution by Jorio et al. Recent advances in the organization of carbon nanotubes into fibers are reviewed, including methods based on spinning from solution, from dry forests, and directly from the gas phase during growth. The organization of carbon nanotubes on surfaces, as a critical prerequisite toward future applications in nanoelectronics, is reviewed with particular emphasis given to the synthesis of both vertically and horizontally aligned arrays. Vertically aligned growth has been recently boosted by the development of highly efficient catalytic processes. Horizontally aligned growth on surfaces can yield a whole new array of carbon-nanotube patterns, with interesting physical properties and potential applications. Different mechanisms of horizontally aligned growth include field-and flow-directed growth, as well as recently developed methods of surface-directed growth on single-crystal substrates by epitaxial approaches. The proposed mechanisms pertinent to each technique are discussed throughout this review, as well as their potential applications and critical aspects toward future progress.

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Section: Wet Methodsmentioning

confidence: 99%

Carbon Nanotube Synthesis and Organization

Joselevich

Dai

Liu

et al. 2007

Topics in Applied Physics

122

View full text Add to dashboard Cite

show abstract

“…It has been known that CNTs refined using acids such as HNO 3 may possess oxygen-related functional groups (e.g., carboxyl groups) on their outer walls [28], and also on the corona-treated PET substrate via a hydrogen bond [29]. This indicates that the adhesive force between the PET substrate and the CNTs can be enhanced by corona treatment of the PET substrate.…”

Section: Surface Modification Of Pet Substrates Via Corona Treatmentmentioning

confidence: 99%

Applications of Carbon Nanotubes to Flexible Transparent Conductive Electrodes

Kim¹,

Park²

2018

Carbon Nanotubes - Recent Progress

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Transparent conductive electrodes (TCEs) have attracted great interest because of their wide range of applications in solar cells, liquid crystal displays (LCDs), organic lightemitting diodes (OLEDs), and touch screen panels (TSPs). Indium-tin-oxide (ITO) thin films as TCEs possess exceptional optoelectronic properties, but they have several disadvantages such as a brittle nature due to their low fracture strain and lack of flexibility, a high processing temperature that damages the flexible substrates, low adhesion to polymeric materials, and relative rarity on Earth, which makes their price unstable. This has motivated several research studies of late for developing alternative materials to replace ITO such as metal meshes, metal nanowires, conductive polymers, graphene, and carbon nanotubes (CNTs). Out of the abovementioned candidates, CNTs have advantages in chemical stability, thermal conductivity, mechanical strength, and flexibility. However, there are still several problems yet to be solved for achieving CNT-based flexible TCEs with excellent characteristics and high stability. In this chapter, the properties of CNTs and their applications especially for flexible TCEs are presented, including the preparation details of CNTs based on solution processes, the surface modification of flexible substrates, and the various types of hybrid TCEs based on CNTs.

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“…The wettability depends upon the surface tension of the liquid. According to Zisman's rule, each solid has a critical surface tension γ c , which is a partial wetting if γ> γ c (2) And total wetting if γ <γ c (3) where, γ is the surface tension of the organic liquid, and γ c the critical surface tension of SiO 2 aerogels. As the critical surface tension of SiO 2 aerogels is larger than the surface tension of organic liquid (Table 1, 25 ℃), therefore the organic liquid can completely wet the SiO 2 aerogels surface and be easily absorbed.…”

Section: Adsorption Intensity Of Hydrophobic Sio 2 Aerogels and Activmentioning

confidence: 99%

“…Absorption materials have many applications in wastewater treatment [1] , air purifi cation [2] , and chemical purification [3] . Currently, the most widely used materials are activated carbon and silica.…”

Section: Introductionmentioning

confidence: 99%

Preparation and adsorption property of hydrophobic SiO2 aerogels modified by methyl triethoxysilane

Cui

Lin

Liu³

et al. 2011

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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The hydrophobic SiO 2 aerogels were prepared by in-situ polymerization sol-gel method and supercritical drying of ethanol method with tetraethylorthosilicate(TEOS) as silica source, methyl triethoxysilane (MTMS) as modifi er, ethanol as solvent. Moreover, the structure and adsorption property of SiO 2 aerogels were also studied. As results, the surface area of SiO 2 aerogels was 863.59 m 2 /g, the pore volume was 3.57 cm 3 /g, and the contact angle was 150 °. Adsorption intensity of silica aerogels for organic liquid (alkanes, benzene compounds, and nitro-compounds) is bigger than that of activated carbon. The mass of the liquid absorbed increased linearly with the surface tension of the liquid. The lower surface tension and boiling point are, the shorter desorption time is. After regenerating 10 times, nitromethane regeneration rate remain the same, and almost more than 94%. So SiO 2 aerogels have good absorption and regeneration property.

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Centrifugal purification of chemically modified single-walled carbon nanotubes

Cited by 39 publications

References 33 publications

Carbon Nanotube Synthesis and Organization

Carbon Nanotube Synthesis and Organization

Applications of Carbon Nanotubes to Flexible Transparent Conductive Electrodes

Preparation and adsorption property of hydrophobic SiO2 aerogels modified by methyl triethoxysilane

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