Influence of electric field type on the assembly of single walled carbon nanotubes

Kumar, Maneesh; Kim, T.H.; Lee, S.H.; Song, Seong Min; Yang, Jaekyung; Nahm, Kee Suk; Suh, Eun Kyoung

doi:10.1016/j.cplett.2003.11.032

Cited by 81 publications

(8 citation statements)

References 15 publications

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“…Additionally, the average spacing between trapped CNTs increases with increasing AC component. 53 Similar observations regarding CNT spacing and orientation of single walled CNTs are reported by Kumar et al 57 If electrophoresis is used, a prior purification step is necessary to remove such particles. 46 Following an earlier work on biased AC fields, 58 another finding by Chung et al 53 is concerned about the necessity of the DC component for creating this order.…”

Section: Alignment Under External Fields (Di)electrophoresissupporting

confidence: 65%

Integration of one-dimensional nanostructures with microsystems: an overview

Alaca

2009

International Materials Reviews

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The current state of solutions provided for the issue of integration between micro-and nanoscales is reviewed for the specific case of nanowires and nanotubes. Such structures serve as field emitters, transistors or laser sources, digits for manipulation and handling, as sensing elements or as agents for the modification of surface properties such as the adhesive strength. However, it is noteworthy that the majority of reported device work remains confined to component level prototype development without the prospect of full scale system integration due to the lack of batch compatible fabrication and processing techniques. On the one hand, nanostructures made by self-assembly do not possess a high level of control on their orientation and numbers, and hence, their interfacing and integration with a microsystem pose difficulties. On the other hand, top-down approaches such as manipulation, serial deposition and high resolution lithographic techniques do not satisfy the needs of large scale fabrication due to their expensive and/or nonparallel working principles. These techniques along with hybrid approaches taking advantage of the structural control of self-assembly and geometric control of high resolution lithography will be discussed and major applications will be highlighted to shed light on the capabilities and limitations associated with each process.

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Section: Alignment Under External Fields (Di)electrophoresissupporting

confidence: 65%

Integration of one-dimensional nanostructures with microsystems: an overview

Alaca

2009

International Materials Reviews

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“…The interaction energy increases as the square of the electric field and increases significantly with CNT length. Alignment of micrometer-long CNTs typically needs fields of >1 V/μm. − It is therefore very unlikely that 50 nm long CNTs subjected to 40 mV/μm (as in our experiments) would be aligned. The fact that we measured no significant difference in mobility between 50 and 500 nm CNTs shows that both have a similar orientation distribution, and so we may assume that the latter, too, have a random orientation.…”

Section: Resultsmentioning

confidence: 88%

Measurement of Electrostatic Properties of DNA-Carbon Nanotube Hybrids by Capillary Electrophoresis

et al. 2009

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The unique structure and properties of DNA-wrapped single-walled carbon nanotubes (DNA-CNTs) allow solution phase sorting of nanotubes by length and chirality, and enable many fundamental studies and technological applications. However, the atomic structure of the DNA-CNT hybrid and its electrostatic behavior in solution are not well established. To probe its structure, we have measured the electrophoretic mobilities of length-and chirality-sorted (6,5) and (7,5) CNTs wrapped by poly(GT) sequences, as well as those of single-and double-stranded DNA, at different solution temperatures. We find that DNA-CNT hybrids and double-stranded DNA, which have similar diameters, also have comparable electrophoretic mobility. On the basis of these measurements, we estimate the charge density of poly(GT)-CNT to be 6.0 e -/nm for (6,5) and 6.8 e -/nm for (7,5) CNTs. These results impose constraints on structural models of DNA-CNT. We present a model of an ordered DNA barrel comprising hydrogen bonded strands that form a seamless tube around a CNT, and show that the model predicts DNA-CNT charge densities consistent with experimentally determined values.

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“…Attempts have been made to align nanotubes to increase reinforcement. Alignment techniques include melt drawing [9], polymer stretching [148,238,239], alternating-current electric field [240,241,242,243], surface acoustic waves [244], direct-current electric field [241,242,243,245] and magnetic fields [246,247,248]. Studies [9,238,239,249,250,251] have shown that in composites where the nanotubes were aligned, a significant increase in the modulus was obtained over non-aligned composites.…”

Section: Properties Of Nanocompositesmentioning

confidence: 99%

Polymer Nanocomposites—A Comparison between Carbon Nanotubes, Graphene, and Clay as Nanofillers

2016

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Nanofilled polymeric matrices have demonstrated remarkable mechanical, electrical, and thermal properties. In this article we review the processing of carbon nanotube, graphene, and clay montmorillonite platelet as potential nanofillers to form nanocomposites. The various functionalization techniques of modifying the nanofillers to enable interaction with polymers are summarized. The importance of filler dispersion in the polymeric matrix is highlighted. Finally, the challenges and future outlook for nanofilled polymeric composites are presented.

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Influence of electric field type on the assembly of single walled carbon nanotubes

Cited by 81 publications

References 15 publications

Integration of one-dimensional nanostructures with microsystems: an overview

Integration of one-dimensional nanostructures with microsystems: an overview

Measurement of Electrostatic Properties of DNA-Carbon Nanotube Hybrids by Capillary Electrophoresis

Polymer Nanocomposites—A Comparison between Carbon Nanotubes, Graphene, and Clay as Nanofillers

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