Kim Sunwoo, Kim Woo-Jae
Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea.
Gels. 2022 Jan 24;8(2):76. doi: 10.3390/gels8020076.
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.
碳纳米管（CNT）根据其手性具有金属或半导体特性，由于其优异的导电性、机械强度和热导率，是可用于不同器件和材料（如燃料电池、晶体管、太阳能电池、增强材料和医用材料）的先进材料。单壁碳纳米管（SWNT）因其出色的电学和光学特性而受到特别关注；然而，无法选择性地合成特定类型的碳纳米管一直是其商业化的主要障碍。因此，研究人员研究了基于电学和光学特性分离单壁碳纳米管的不同方法。凝胶色谱法能够大规模分离金属/半导体（m/s）单壁碳纳米管和具有特定带隙的单手性单壁碳纳米管。基于凝胶色谱的单壁碳纳米管分离的核心原理是单壁碳纳米管与凝胶之间的相互作用，这取决于前者独特的电学性质。可控孔径玻璃、硅胶、琼脂糖基凝胶和烯丙基葡聚糖基凝胶已被用作凝胶色谱的介质。本文介绍了单壁碳纳米管与凝胶之间的相互作用以及基于凝胶色谱的不同单壁碳纳米管分离技术。本文可为计划用凝胶色谱法分离单壁碳纳米管的研究人员提供参考。
