Applied Physics Express ( IF 2.3 ) Pub Date : 2020-12-22 , DOI: 10.35848/1882-0786/abd28b Yuki Matsunaga 1 , Jun Hirotani 2 , Yutaka Ohno 2, 3 , Haruka Omachi 1, 4
The gel column chromatographic separation technique is one of the most rapid and reliable methods to prepare high-purity semiconducting single-wall carbon nanotubes (SWCNTs). However, the use of the expensive dextran-based gels limits the utility and scalability of this technique. Herein, we report the cross-linking gelation of a cost-efficient polysaccharide isomaltodextrin (IMD) for the high-purity separation of s-SWCNTs by column chromatography. The cross-linking reaction with epichlorohydrin under precisely controlled basic conditions gave the sub-micrometer porous IMD gels, which was important for achieving gel chromatographic SWCNT separation. Furthermore, the thin-film transistors prepared from the separated s-SWCNTs exhibited excellent on/off ratios.
中文翻译:
异麦芽糖糊精的交联胶凝用于半导体碳纳米管的色谱分离
凝胶柱色谱分离技术是制备高纯度半导体单壁碳纳米管(SWCNT)的最快速,最可靠的方法之一。然而,昂贵的基于葡聚糖的凝胶的使用限制了该技术的实用性和可扩展性。在这里,我们报告了一种高性价比的多糖异麦芽糊精(IMD)的交联凝胶化,用于通过柱色谱法高纯度分离s-SWCNTs。在精确控制的碱性条件下,与表氯醇的交联反应得到亚微米级的多孔IMD凝胶,这对于实现凝胶色谱SWCNT分离非常重要。此外,由分离的s-SWCNT制备的薄膜晶体管表现出优异的开/关比。