Filling carbon nanotubes

Ugarte, D.; Stöckli, Thomas; Bonard, Jean–Marc; Châtelain, A.; Heer, Walt A. de

doi:10.1007/s003390050744

Cited by 132 publications

(84 citation statements)

References 21 publications

(45 reference statements)

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“…A key process is the ability of fluids to penetrate into fine pores with wettable walls. Filling hollow carbon nanotubes or alumina nanopore arrays with chosen materials opens exciting possibilities to generate nearly one-dimensional nanostructures [2,3]. In this context, also the filling of silicon dioxide nanochannels [4] and of rolled-up InAs/GaAs tubes [5] has found great interest.…”

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confidence: 99%

Capillary Rise in Nanopores: Molecular Dynamics Evidence for the Lucas-Washburn Equation

2007

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When a capillary is inserted into a liquid, the liquid will rapidly flow into it. This phenomenon, well studied and understood on the macroscale, is investigated by Molecular Dynamics simulations for coarse-grained models of nanotubes. Both a simple Lennard-Jones fluid and a model for a polymer melt are considered. In both cases after a transient period (of a few nanoseconds) the meniscus rises according to a √ time-law. For the polymer melt, however, we find that the capillary flow exhibits a slip length δ, comparable in size with the nanotube radius R. We show that a consistent description of the imbibition process in nanotubes is only possible upon modification of the Lucas-Washburn law which takes explicitly into account the slip length δ. We also demonstrate that the velocity field of the rising fluid close to the interface is not a simple diffusive spreading.

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confidence: 99%

Capillary Rise in Nanopores: Molecular Dynamics Evidence for the Lucas-Washburn Equation

2007

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“…[1][2][3] There are two types of CNTs, single wall carbon nanotubes (SWCNTs) comprising of one cylinder and multiwall carbon nanotubes (MWCNTs) comprised of 2 to 50 cylinders concentrically stacked with a common long axis. 4 CNTs are produced in increasing amounts for several industrial applications, because their structures are endowed with extremely advantageous chemical and mechanical features.…”

Section: Introductionmentioning

confidence: 99%

NANOTOXICITY OF MULTIWALL CARBON NANOTUBES TO A549 CELLS IN VITRO

Wang

Zhang

Jin

et al. 2014

NANO

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Multiwall carbon nanotubes (MWCNTs) have been widely applied in many¯elds due to the excellent physical and chemical properties. As the production and applications of nanotubes expand, public concern about their potential risks to human health has also raised. Cytotoxicity of MWCNTs was evaluated in this study using a cultured human epithelial cell line A549. Uptake of MWCNTs by cultured A549 cells was observed by TEM imaging. Dose-dependent decrease of cell viability showed the cytotoxicity of MWCNTs. Signi¯cant reactive oxygen species (ROS) generation and GSH depletion which reduced the cellular antioxidant level could be the major factor of cytotoxicity induced by MWCNTs. MWCNTs seemed to trigger the activation of cell autophagy with the intracellular ATG16L1 level increase as a defense mechanism.

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“…The first examples of this class were reported back in 1993 [6]. Subsequent developments have been summarized in a few comprehensive review articles [7,8].…”

Section: Introductionmentioning

confidence: 99%

Recent developments in inorganically filled carbon nanotubes: successes and challenges

Gautam

Costa²,

Bando

et al. 2010

Science and Technology of Advanced Materials

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Carbon nanotubes (CNTs) are a unique class of nanomaterials that can be imagined as rolled graphene sheets. The inner hollow of a CNT provides an extremely small, one-dimensional space for storage of materials. In the last decade, enormous effort has been spent to produce filled CNTs that combine the properties of both the host CNT and the guest filling material. CNTs filled with various inorganic materials such as metals, alloys, semiconductors and insulators have been obtained using different synthesis approaches including capillary filling and chemical vapor deposition. Recently, several potential applications have emerged for these materials, such as the measurement of temperature at the nanoscale, nano-spot welding, and the storage and delivery of extremely small quantities of materials. A clear distinction between this class of materials and other nanostructures is the existence of an enormous interfacial area between the CNT and the filling matter. Theoretical investigations have shown that the lattice mismatch and strong exchange interaction of CNTs with the guest material across the interface should result in reordering of the guest crystal structure and passivation of the surface dangling bonds and thus yielding new and interesting physical properties. Despite preliminary successes, there remain many challenges in realizing applications of CNTs filled with inorganic materials, such as a comprehensive understanding of their growth and physical properties and control of their structural parameters. In this article, we overview research on filled CNT nanomaterials with special emphasis on recent progress and key achievements. We also discuss the future scope and the key challenges emerging out of a decade of intensive research on these fascinating materials.

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Filling carbon nanotubes

Cited by 132 publications

References 21 publications

Capillary Rise in Nanopores: Molecular Dynamics Evidence for the Lucas-Washburn Equation

Capillary Rise in Nanopores: Molecular Dynamics Evidence for the Lucas-Washburn Equation

NANOTOXICITY OF MULTIWALL CARBON NANOTUBES TO A549 CELLS IN VITRO

Recent developments in inorganically filled carbon nanotubes: successes and challenges

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