Tailored synthesis of hydrogel media for chirality separation of single walled carbon nanotubes

Dolan, Marshal; Watts, Brennan P; Tvrdy, Kevin

doi:10.1016/j.carbon.2020.08.074

Cited by 10 publications

(35 citation statements)

References 69 publications

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“…Considering that non-Sephacryl gels do not include an amide group, it is estimated that the amide groups in MBA are at the core of SWNT-gel interaction [77,86]. Dolan et al (2021) analyzed the effect of the APS concentration (i.e., the radical initiator) on the repulsive interaction between Sephacryl gel and SDS-SWNT assemblies (Figure 9). In addition, they explained the adsorption and desorption mechanisms of SWNTs on organosulfate by the electrostatic forces of APS.…”

Section: Structures and Properties Of Allyl Dextran-based Gelsmentioning

confidence: 99%

“…In contrast, the relatively strong binding between agarose based-gel and s-SWNTs originates from the absence of APS. This is the reason why the allyl dextran-based gel can better perform simultaneous separation of high-purity m-and s-SWNTs than agarose based-gels [65,77]. Another important factor for SWNT separation is the pore size.…”

Section: Structures and Properties Of Allyl Dextran-based Gelsmentioning

confidence: 99%

“…If the gel volume is large, m-SWNTs can be eluted by the additional injection of surfactant aqueous solution [ 49 , 62 , 63 ]. Finally, a highly concentrated surfactant aqueous solution is injected into the gel to elute the s-SWNTs, which have been strongly adsorbed by the gel [ 61 , 64 , 65 , 66 ]. The different adsorption strengths of the gel and surfactant–SWNT assembly originate from the different amounts of surfactants on the m- and s-SWNTs.…”

Section: Introductionmentioning

confidence: 99%

“…Allyl dextran-based gel is widely used in the gel filtration of SWNTs. Moreover, Sephacryl S-200 (GE healthcare) with 8.3 nm wide pores in allyl dextran-based gel is used as a standard medium in gel chromatography [ 65 ]. This paper presents the SWNT separation mechanism and successful examples of SWNT separation with different gel types.…”

Section: Introductionmentioning

confidence: 99%

“…The increase in the gelled area is expected to enable active interaction between SWNT and MBA within Sephacryl gels. Considering that non-Sephacryl gels do not include an amide group, it is estimated that the amide groups in MBA are at the core of SWNT-gel interaction[77,86] Dolan et al (2021). analyzed the effect of the APS concentration (i.e., the radical initiator) on the repulsive interaction between Sephacryl gel and SDS-SWNT assemblies (Figure9).…”

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confidence: 99%

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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: Structures and Properties Of Allyl Dextran-based Gelsmentioning

confidence: 99%

Section: Structures and Properties Of Allyl Dextran-based Gelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Gel Chromatography for Separation of Single-Walled Carbon Nanotubes

Kim

2022

Gels

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Recent Advances in Structure Separation of Single‐Wall Carbon Nanotubes and Their Application in Optics, Electronics, and Optoelectronics

Wei

Wang

et al. 2022

Advanced Science

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Structural control of single-wall carbon nanotubes (SWCNTs) with uniform properties is critical not only for their property modulation and functional design but also for applications in electronics, optics, and optoelectronics. To achieve this goal, various separation techniques have been developed in the past 20 years through which separation of high-purity semiconducting/metallic SWCNTs, single-chirality species, and even their enantiomers have been achieved. This progress has promoted the property modulation of SWCNTs and the development of SWCNT-based optoelectronic devices. Here, the recent advances in the structure separation of SWCNTs are reviewed, from metallic/semiconducting SWCNTs, to single-chirality species, and to enantiomers by several typical separation techniques and the application of the corresponding sorted SWCNTs. Based on the separation procedure, efficiency, and scalability, as well as, the separable SWCNT species, purity, and quantity, the advantages and disadvantages of various separation techniques are compared. Combined with the requirements of SWCNT application, the challenges, prospects, and development direction of structure separation are further discussed.

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Highly Pure, Length-Sorted Boron Nitride Nanotubes by Gel Column Chromatography

Kim

Moon

et al. 2021

Chem. Mater.

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Boron nitride nanotubes (BNNTs) have attracted enormous attention owing to their exceptional physical, chemical, and thermal properties. However, the implementation of such properties into practical applications has been hindered severely by limitations on the synthesis that results in a BNNT mixture containing significant amounts of impurities with varying size dispersity. Here, we present simultaneous purification and length sorting of such a mixture via gel column chromatography, where the components are effectively separated based on their affinity difference to the matrix. We report near-complete removal of the major impurities including >99% of the boron allotropes and 99.9% of the hexagonal boron nitrides while showing a series of length fractions containing long (1.00 ± 0.36 μm), medium (0.51 ± 0.21), and short (0.31 ± 0.19 μm) BNNTs in a one-step process that takes less than an hour. We expect the protocol established here to serve as a simple, fast, and scalable processing method amenable to the low-cost industrial processes, targeting various future BNNT applications that require high-purity BNNTs with tailored nanotube length.

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Tailored synthesis of hydrogel media for chirality separation of single walled carbon nanotubes

Cited by 10 publications

References 69 publications

Gel Chromatography for Separation of Single-Walled Carbon Nanotubes

Gel Chromatography for Separation of Single-Walled Carbon Nanotubes

Recent Advances in Structure Separation of Single‐Wall Carbon Nanotubes and Their Application in Optics, Electronics, and Optoelectronics

Highly Pure, Length-Sorted Boron Nitride Nanotubes by Gel Column Chromatography

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