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Journal ArticleDOI

Sorting carbon nanotubes by electronic structure using density differentiation

TLDR
Using the scalable technique of density-gradient ultracentrifugation, isolated narrow distributions of SWNTs in which >97% are within a 0.02-nm-diameter range are isolated.
Abstract
The heterogeneity of as-synthesized single-walled carbon nanotubes (SWNTs) precludes their widespread application in electronics, optics and sensing. We report on the sorting of carbon nanotubes by diameter, bandgap and electronic type using structure-discriminating surfactants to engineer subtle differences in their buoyant densities. Using the scalable technique of density-gradient ultracentrifugation, we have isolated narrow distributions of SWNTs in which >97% are within a 0.02-nm-diameter range. Furthermore, using competing mixtures of surfactants, we have produced bulk quantities of SWNTs of predominantly a single electronic type. These materials were used to fabricate thin-film electrical devices of networked SWNTs characterized by either metallic or semiconducting behaviour.

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Citations
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Journal ArticleDOI

Carbon Nanotubes: Present and Future Commercial Applications

TL;DR: Although not yet providing compelling mechanical strength or electrical or thermal conductivities for many applications, CNT yarns and sheets already have promising performance for applications including supercapacitors, actuators, and lightweight electromagnetic shields.
Journal ArticleDOI

Science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems

Andrea C. Ferrari, +68 more
- 04 Mar 2015 - 
TL;DR: An overview of the key aspects of graphene and related materials, ranging from fundamental research challenges to a variety of applications in a large number of sectors, highlighting the steps necessary to take GRMs from a state of raw potential to a point where they might revolutionize multiple industries are provided.
Journal ArticleDOI

Electronics based on two-dimensional materials

TL;DR: A review of electronic devices based on two-dimensional materials, outlining their potential as a technological option beyond scaled complementary metal-oxide-semiconductor switches and the performance limits and advantages, when exploited for both digital and analog applications.
Journal ArticleDOI

Emerging Transparent Electrodes Based on Thin Films of Carbon Nanotubes, Graphene, and Metallic Nanostructures

TL;DR: This review will explore the materials properties of transparent conductors, covering traditional metal oxides and conductive polymers initially, but with a focus on current developments in nano-material coatings.
Journal ArticleDOI

Mixed-dimensional van der Waals heterostructures

TL;DR: In this paper, a survey of mixed-dimensional van der Waals (vdw) heterostructures is presented, where 2D materials with non-2D materials adhere primarily through non-covalent interactions.
References
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Journal ArticleDOI

Carbon Nanotubes--the Route Toward Applications

TL;DR: Many potential applications have been proposed for carbon nanotubes, including conductive and high-strength composites; energy storage and energy conversion devices; sensors; field emission displays and radiation sources; hydrogen storage media; and nanometer-sized semiconductor devices, probes, and interconnects.
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Band gap fluorescence from individual single-walled carbon nanotubes.

TL;DR: At pH less than 5, the absorption and emission spectra of individual nanotubes show evidence of band gap–selective protonation of the side walls of the tube, which is readily reversed by treatment with base or ultraviolet light.
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Ballistic carbon nanotube field-effect transistors

TL;DR: It is shown that contacting semiconducting single-walled nanotubes by palladium, a noble metal with high work function and good wetting interactions with nanotube, greatly reduces or eliminates the barriers for transport through the valence band of nanot tubes.
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Transparent, Conductive Carbon Nanotube Films

TL;DR: Characteristics of the fabrication of ultrathin, transparent, optically homogeneous, electrically conducting films of pure single-walled carbon nanotubes indicate broad applicability of the films for electrical coupling in photonic devices.
Journal ArticleDOI

Engineering Carbon Nanotubes and Nanotube Circuits Using Electrical Breakdown

TL;DR: A simple and reliable method for selectively removing single carbon shells from MWNTs and SWNT ropes to tailor the properties of these composite nanotubes and to directly address the issue of multiple-shell transport.
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