Yu, Ilhwan Jo, Yerin Ko, Jaehyoung Moon, Se Youn Ahn, Seokhoon Joo, Yongho 2024-01-19T15:04:02Z 2024-01-19T15:04:02Z 2022-01-10 2021-03-17 1944-8244 https://pubs.kist.re.kr/handle/201004/117254 Boron nitride nanotubes (BNNTs) have attracted increasing attention for their exceptional thermal, electronic, and optical properties. However, the progress in BNNTs applications has largely been limited by the low purity of as-synthesized BNNTs and inefficient solution-processing protocols due mainly to the instability of BNNTs in most of the solvents. Therefore, fabrication of highly pure, stable, and fully individualized BNNTs in a rational manner is required. Here, we report a significant improvement in the preparation of well-dispersed BNNTs, utilizing conjugated polymers that interact with BNNTs, allowing selective sorting and individualization of the nanotubes. Evidence of strong interactions between the polymers and BNNTs was observed by optical absorption and photoluminescence spectroscopies, while effective individualization was observed by electron microscopy. The sorted BNNTs were successfully used in a solution-processing protocol called dose-controlled, floating evaporative self-assembly (DFES) previously established for single-walled carbon nanotubes (SWCNT) array fabrication. A device fabricated via DFES from the sorted BNNTs mixed with polymer-wrapped, semiconducting single-walled carbon nanotubes (s-SWCNTs) exhibited an on-state conductance of 253 +/- 6 mu S mu m(-1) and an on/off ratio of 106.6 +/- 0.4 for a gate voltage of -0.1 V. This breakthrough in BNNT dispersion and isolation is a significant advancement toward the exploitation of BNNTs in future applications. English American Chemical Society Highly Aligned Array of Heterostructured Polyflourene-Isolated Boron Nitride and Carbon Nanotubes Article 10.1021/acsami.1c02315 1 ACS Applied Materials & Interfaces, v.13, no.10, pp.12417 - 12424 ACS Applied Materials & Interfaces 13 10 12417 12424 scie scopus 000630398500089 2-s2.0-85103228802 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article boron nitride nanotubes polyfluorene dose-controlled floating evaporative self-assembly field-effect transistor heterogeneous nanotube thin film