Ko, Jaehyoung Kim, Hyun Min Moon, Se Youn Ahn, Seokhoon Im, Sung Gap Joo, Yongho 2024-01-19T14:31:18Z 2024-01-19T14:31:18Z 2021-10-21 2021-06-22 0897-4756 https://pubs.kist.re.kr/handle/201004/116847 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 mu m), medium (0.51 +/- 0.21), and short (0.31 +/- 0.19 mu m) 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. English AMER CHEMICAL SOC WALLED CARBON NANOTUBES METAL/SEMICONDUCTOR SEPARATION THERMAL-CONDUCTIVITY DISPERSION PURIFICATION SUPERHYDROPHOBICITY PERFORMANCE COMPOSITES STABILITY Highly Pure, Length-Sorted Boron Nitride Nanotubes by Gel Column Chromatography Article 10.1021/acs.chemmater.1c01165 1 CHEMISTRY OF MATERIALS, v.33, no.12, pp.4723 - 4732 CHEMISTRY OF MATERIALS 33 12 4723 4732 scie scopus 000665651400043 2-s2.0-85108578323 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article WALLED CARBON NANOTUBES METAL/SEMICONDUCTOR SEPARATION THERMAL-CONDUCTIVITY DISPERSION PURIFICATION SUPERHYDROPHOBICITY PERFORMANCE COMPOSITES STABILITY