Controlled preparation and electron emission properties of three-dimensional micropatterned aligned carbon nanotubes

Patil, Ajeeta; Ohashi, Toshiyuki; Buldum, Alper; Dai, Liming

doi:10.1063/1.2345253

Cited by 14 publications

(17 citation statements)

References 35 publications

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“…Dai and co‐workers have developed a simple, but very effective and versatile dry contact transfer technique for the controlled preparation of 3D perpendicularly aligned CNT micropatterns 144. 145 As schematically illustrated in Figure 9, this work starts with adhering a TEM grid onto Scotch tape as a mask, followed by sputter coating with silver through this mask (Figure 9 a).…”

Section: Post‐synthetic Approaches To Cnt Assemblymentioning

confidence: 99%

Advances in Carbon‐Nanotube Assembly

Yan

Chan‐Park

Zhang

2006

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Iijima's observation in 1991 of fullerene-like materials by high-resolution transmission electron microscopy heralded the beginning of the carbon nanotube (CNT) era. A wealth of theoretical predictions and experimental verifications about CNTs have disclosed remarkable size- and structure-dependent properties that are attractive for various potential applications, ranging from conducting wires in molecular devices to fillers in nanocomposites. Many of these applications require assembly (alignment and/or patterning) of CNTs into hierarchical arrays over large-scale areas with controllable shape, location, orientation, and density of the nanotubes. Efforts from both the scientific and engineering points of view have been made to address this issue, beginning shortly after the discovery of CNTs. We review here the development of CNT-assembly techniques under the two rubrics of synthetic assembly and post-synthetic assembly, with emphasis given to the post-synthetic approach. Preliminary to the survey of assembly techniques, we also discuss the characterization techniques that have been widely used for the challenging tasks of visualizing and quantifying CNT assembly.

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Section: Post‐synthetic Approaches To Cnt Assemblymentioning

confidence: 99%

Advances in Carbon‐Nanotube Assembly

Yan

Chan‐Park

Zhang

2006

Small

175

112

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“…A different method is the so-called “contact transfer” for producing micropatterns of the aligned carbon nanotubes by pressing on the adhesive layer of Scotch tape pre-patterned with a non-adhesive layer, followed by peeling the Scotch tape off to obtain positive and negative patterns [70]. 3D multicomponent micropatterns were synthesized by direct growth using masks produced by contact transfer [71]. Another example is the patterned growth of 3D interposed VA-SWCNTs and VA-MWCNTs by activating selective regions of iron substrates used for the synthesis of VA-MWCNTs with a thin layer of Al for the growth of VA-SWCNTs [72].…”

Section: Reviewmentioning

confidence: 99%

Functionalization of vertically aligned carbon nanotubes

Hooijdonk¹,

Bittencourt²,

Snyders³

et al. 2013

Beilstein J. Nanotechnol.

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SummaryThis review focuses and summarizes recent studies on the functionalization of carbon nanotubes oriented perpendicularly to their substrate, so-called vertically aligned carbon nanotubes (VA-CNTs). The intrinsic properties of individual nanotubes make the VA-CNTs ideal candidates for integration in a wide range of devices, and many potential applications have been envisaged. These applications can benefit from the unidirectional alignment of the nanotubes, the large surface area, the high carbon purity, the outstanding electrical conductivity, and the uniformly long length. However, practical uses of VA-CNTs are limited by their surface characteristics, which must be often modified in order to meet the specificity of each particular application. The proposed approaches are based on the chemical modifications of the surface by functionalization (grafting of functional chemical groups, decoration with metal particles or wrapping of polymers) to bring new properties or to improve the interactions between the VA-CNTs and their environment while maintaining the alignment of CNTs.

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“…Enhanced electromagnetic field effects can be generated close to the metal surface, which stem from the electromagnetic coupling between nanoparticles or from periodically ordered metal nanostructures, making it possible to transfer optical signals along the nanoparticle array. [16][17][18][19][20] In this paper, we emphasize on the mutual interaction between core/shell NPs in ferrofluids under the influence of the external magnetic field. The ferrofluid is a type of colloidal suspension, in which single domain magnetic particles (about 10 nm in diameter) are dispersed in the polar or non-polar liquid.…”

Section: Introductionmentioning

confidence: 99%