Multifunctional Carbon Nanotube Yarns by Downsizing an Ancient Technology

Zhang, Mei; Atkinson, K. R.; Baughman, Ray H.

doi:10.1126/science.1104276

Cited by 1,626 publications

(1,282 citation statements)

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“…[36,38] The strength of as-spun GO fiber is also much higher than single yarns of pure multi-walled CNTs (~250 MPa). [40] It should be noted that the GO used in this study is much larger compared to "giant GO" [17] (37µm in this study vs 18µm), which is the basis of the enhanced improvement in mechanical properties attained in the current study.…”

Section: Mechanical Propertiesmentioning

confidence: 97%

Scalable One‐Step Wet‐Spinning of Graphene Fibers and Yarns from Liquid Crystalline Dispersions of Graphene Oxide: Towards Multifunctional Textiles

Jalili

Aboutalebi

Esrafilzadeh

et al. 2013

Adv Funct Materials

379

426

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. (2013). Scalable one-step wet-spinning of graphene fibers and yarns from liquid crystalline dispersions of graphene oxide: towards multifunctional textiles. Advanced Functional Materials, 23 (43), 5345-5354.Scalable one-step wet-spinning of graphene fibers and yarns from liquid crystalline dispersions of graphene oxide: towards multifunctional textiles AbstractKey points in the formation of liquid crystalline (LC) dispersions of graphene oxide (GO) and their processability via wet-spinning to produce long lengths of micrometer-dimensional fibers and yarns are addressed. Based on rheological and polarized optical microscopy investigations, a rational relation between GO sheet size and polydispersity, concentration, liquid crystallinity, and spinnability is proposed, leading to an understanding of lyotropic LC behavior and fiber spinnability. The knowledge gained from the straightforward formulation of LC GO "inks" in a range of processable concentrations enables the spinning of continuous conducting, strong, and robust fibers at concentrations as low as 0.075 wt%, eliminating the need for relatively concentrated spinning dope dispersions. The dilute LC GO dispersion is proven to be suitable for fiber spinning using a number of coagulation strategies, including non-solvent precipitation, dispersion destabilization, ionic cross-linking, and polyelectrolyte complexation. One-step continuous spinning of graphene fibers and yarns is introduced for the first time by in situ spinning of LC GO in basic coagulation baths (i.e., NaOH or KOH), eliminating the need for post-treatment processes. The thermal conductivity of these graphene fibers is found to be much higher than polycrystalline graphite and other types of 3D carbon based materials. New insights are provided into the processing of liquid crystalline graphene oxide (GO) dispersion (containing large GO sheets) demonstrating a facile and scalable production of GO and reduced GO fibers and yarns with exciting properties such as high thermal conductivity. These results provide a universal platform for the development of solution-based processing methods, properties, and applications of liquid crystalline GO-based architectures. AbstractIn the present work, we address key points in the formation of liquid crystalline (LC) dispersions of graphene oxide (GO) and their processability via wet-spinning to produce long lengths of micron dimensional fibers and yarns. Based on rheological and polarized optical microscopy investigations, a rational relation between GO sheet size and polydispersity, concentration, liquid crystallinity and spinnability is proposed leading to the understanding of 2 lyotropic LC behavior and fiber spinnability. The knowledge gained from our straightforward formulation of LC GO "inks" in a range of processable concentrations enabled us to spin continuous conducting, strong and robust fibres at concentrations as low as 0.075 wt. % eliminating the need for relatively concentrated spinning dope dispersions. This concentration is the lowest ever rep...

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Section: Mechanical Propertiesmentioning

confidence: 97%

Scalable One‐Step Wet‐Spinning of Graphene Fibers and Yarns from Liquid Crystalline Dispersions of Graphene Oxide: Towards Multifunctional Textiles

Jalili

Aboutalebi

Esrafilzadeh

et al. 2013

Adv Funct Materials

379

426

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“…This interface is schematically illustrated as a tapered zone in Figure 3a 6 and a 8 , where Schottky barrier modulation of SWNT-FETs takes place. [104] Normally, adsorption of the biomolecular recognition moieties occurs not only onto nanotube sidewalls but also on this tapered-thin metal-SWNT Schottky junction.…”

Section: Transistor Based Biosensorsmentioning

confidence: 99%

“…[1][2][3] CNTs have the potential to revolutionize numerous applications where nano-sized metallic and/or semiconducting components are required along with high strength, [4,5] large flexibility [6] and superb chemical stability. [7,8] In particular, metallic (met-) nanotubes are highly suited for nanoscale circuits, [9] ultrathin, flexible, and transparent conductors, [10] supercapacitors, [11] field emitters, [12] actuators, [13] and nanosized electrochemical probes.…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotubes for Electronic and Electrochemical Detection of Biomolecules

2007

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The unique electronic and optical properties of carbon nanotubes, in conjunction with their size and mechanically robust nature, make these nanomaterials crucial to the development of next-generation biosensing platforms. In this Review, we present recent innovations in carbon nanotube-assisted biosensing technologies, such as DNA-hybridization, protein-binding, antibody-antigen and aptamers. Following a brief introduction on the diameter-and chirality-derived electronic characteristics of single-walled carbon nanotubes, the discussion is focused on the two major schemes for electronic biodetection, namely biotransistor-and electrochemistry-based sensors. Key fabrication methodologies are contrasted in light of device operation and performance, along with strategies for amplifying the signal while minimizing nonspecific binding. This Review is concluded with a perspective on future optimization based on array integration as well as exercising a better control in nanotube structure and biomolecular integration.

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“…For example, prior to 2007, the reported tensile strengths of continuous CNT fibers without a coagulant lay in the range from 0.4 to 1.2 GPa, no matter if they were spun from a suspension. [5][6][7][8][9][10][11][12] Recently, Windle et al reported the synthesis of continuous high-performance CNT fibers with the highest strength value of 9 GPa. [12] This encouraging breakthrough enlightens the use of macroscale CNTs fibers as a structural reinforcement for many applications.…”

mentioning

confidence: 99%

“…Figure 1 shows a typical twisting process. Compared with the existing spinning methods developed by other groups, [5][6][7][8][9][10][11] our twisting method may not be suitable for continuous production of CNT fibers, but the control of the diameters and twisting degrees is more convenient. So the fabricated fibers are ideal systems for the study of CNT macroarchitectures.…”

mentioning

confidence: 99%