Large-scale separation of single-walled carbon nanotubes by electronic type using click chemistry

Um, Jo Eun; Song, Sun Gu; Yoo, Pil J.; Song, Changsik; Kim, Woo Jae

doi:10.1016/j.apsusc.2017.06.092

Cited by 12 publications

(9 citation statements)

References 35 publications

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“…However, because metallic and semiconducting SWNTs cannot be selectively synthesized, SWNTs must be separated by exploiting their electrical (i.e., metallic or semiconducting) properties to enhance their performance in applications. Researchers have studied different SWNT separation methods such as density gradient ultracentrifugation [ 35 , 36 , 37 , 38 ], electrophoresis [ 39 , 40 , 41 , 42 ], selective destruction of specific SWNTs [ 43 , 44 , 45 ], and DNA or polymer wrapping [ 46 , 47 , 48 ]. Many separation technologies have been developed to enable the high-purity separation of metallic SWNTs (m-SWNTs) and semiconducting SWNTs (s-SWNTs).…”

Section: Introductionmentioning

confidence: 99%

Gel Chromatography for Separation of Single-Walled Carbon Nanotubes

Kim

2022

Gels

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Carbon nanotubes (CNTs), having either metallic or semiconducting properties depending on their chirality, are advanced materials that can be used for different devices and materials (e.g., fuel cells, transistors, solar cells, reinforced materials, and medical materials) due to their excellent electrical conductivity, mechanical strength, and thermal conductivity. Single-walled CNTs (SWNTs) have received special attention due to their outstanding electrical and optical properties; however, the inability to selectively synthesize specific types of CNTs has been a major obstacle for their commercialization. Therefore, researchers have studied different methods for the separation of SWNTs based on their electrical and optical properties. Gel chromatography methods enable the large-scale separation of metallic/semiconducting (m/s) SWNTs and single-chirality SWNTs with specific bandgaps. The core principle of gel chromatography-based SWNT separation is the interaction between the SWNTs and gels, which depends on the unique electrical properties of the former. Controlled pore glass, silica gel, agarose-based gel, and allyl dextran-based gel have been exploited as mediums for gel chromatography. In this paper, the interaction between SWNTs and gels and the different gel chromatography-based SWNT separation technologies are introduced. This paper can serve as a reference for researchers who plan to separate SWNTs with gel chromatography.

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Section: Introductionmentioning

confidence: 99%

Gel Chromatography for Separation of Single-Walled Carbon Nanotubes

Kim

2022

Gels

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“…These findings prompted research dedicated to the development of drug delivery platforms based on CNTs [10][11][12]. Another vast area of CNTs applications is in the separation of chiral drugs and various chemicals in pharmaceutical and chemical industries [8,13,14]. This review discusses the progress and main fields of bio-medical use of CNTs based on recently published reports.…”

Section: Introductionmentioning

confidence: 99%

The Advances in Biomedical Applications of Carbon Nanotubes

Saliev

2019

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Unique chemical, physical, and biological features of carbon nanotubes make them an ideal candidate for myriad applications in industry and biomedicine. Carbon nanotubes have excellent electrical and thermal conductivity, high biocompatibility, flexibility, resistance to corrosion, nano-size, and a high surface area, which can be tailored and functionalized on demand. This review discusses the progress and main fields of bio-medical applications of carbon nanotubes based on recently-published reports. It encompasses the synthesis of carbon nanotubes and their application for bio-sensing, cancer treatment, hyperthermia induction, antibacterial therapy, and tissue engineering. Other areas of carbon nanotube applications were out of the scope of this review. Special attention has been paid to the problem of the toxicity of carbon nanotubes.

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“…The mass production of high-purity s-SWCNTs is still required, and it remains challenging because of several factors. − , To separate s-SWCNTs from a pristine SWCNT mixture, several methods have been developed such as density gradient ultracentrifugation (DGU), gel chromatography, electrophoresis, , aqueous two-phase extraction, charge sign reversal method, DNA wrapping, and so on. However, after the separation of s-SWCNTs, if the purity is low, it can cause serious problems in the function of transistors. , Using DGU, separation of s-SWCNTs could be achieved in low quantity (∼0.00035 mmol/day) but with high purity . Gel chromatography might have produced a high yield of semiconducting SWCNTs (∼0.02704 mmol/day), but the purity of s-SWCNTs is low compared to that of DGU …”

Section: Introductionmentioning

confidence: 99%

“…However, after the separation of s-SWCNTs, if the purity is low, it can cause serious problems in the function of transistors. , Using DGU, separation of s-SWCNTs could be achieved in low quantity (∼0.00035 mmol/day) but with high purity . Gel chromatography might have produced a high yield of semiconducting SWCNTs (∼0.02704 mmol/day), but the purity of s-SWCNTs is low compared to that of DGU …”

Section: Introductionmentioning

confidence: 99%

Selective Chemistry-Based Separation of Semiconducting Single-Walled Carbon Nanotubes and Alignment of the Nanotube Array Network under Electric Field for Field-Effect Transistor Applications

et al. 2021

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Semiconducting single-walled carbon nanotubes (s-SWCNTs) are considered as a replacement for silicon in fieldeffect transistors (FETs), solar cells, logic circuits, and so forth, because of their outstanding electronic, optical, and mechanical properties. Herein, we have studied the reaction of pristine SWCNTs dispersed in a pluronic F-68 (PF-68) polymer solution with para-amino diphenylamine diazonium sulfate (PADDS) to separate nanotubes based on their metallicity. The preferential selectivity of the reactions was monitored by changes in the semiconducting (S 22 and S 33 ) and metallic (M 11 ) bands by ultraviolet−visible−near infrared spectroscopy. Metallic selectivity depended on the concentrations of PADDS, reaction time, and the solution pH. Furthermore, separation of pure s-SWCNTs was confirmed by Raman spectroscopy and Fourier-transform infrared spectroscopy. After the removal of metallic SWCNTs, direct current electric field was applied to the pure s-SWCNT solution, which effectively directed the nanotubes to align in one direction as nanotube arrays with a longer length and high density. After that, electrically aligned s-SWCNT solution was cast on a silicon substrate, and the length of the nanotube arrays was measured as ∼2 to ∼14 μm with an areal density of ∼2 to ∼20 tubes/μm of s-SWCNTs. Next, electrically aligned s-SWCNT arrays were deposited on the channel of the FET device by drop-casting. Field-emission scanning electron microscopy and electrical measurements have been carried out to test the performance of the aligned s-SWCNTs/FETs. The fabricated FETs with a channel length of 10 μm showed stable electrical properties with a field-effect mobility of 30.4 cm 2 /Vs and a log 10 (I on /I off ) current ratio of 3.96. We envisage that this new chemical-based separation method and electric field-assisted alignment could be useful to obtain a high-purity and aligned s-SWCNT array network for the fabrication of high-performance FETs to use in digital and analog electronics.

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Large-scale separation of single-walled carbon nanotubes by electronic type using click chemistry

Cited by 12 publications

References 35 publications

Gel Chromatography for Separation of Single-Walled Carbon Nanotubes

Gel Chromatography for Separation of Single-Walled Carbon Nanotubes

The Advances in Biomedical Applications of Carbon Nanotubes

Selective Chemistry-Based Separation of Semiconducting Single-Walled Carbon Nanotubes and Alignment of the Nanotube Array Network under Electric Field for Field-Effect Transistor Applications

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