Highly Stable Single-Walled Carbon Nanotube Sorting by Low Molecular Weight Conjugated Polymer with Hydrogen-Bonded Polyisoprene

Maina Moses Mburu, Ai Nhan Au-Duong, Wei Ting Li, Wen Yueh Yu, Yann Wen Lan, Wei Hung Chiang*, Yu Cheng Chiu

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

The π–π interaction between the conjugated polymer and single-walled carbon nanotubes (SWCNTs) is the key to dispersion and selection of semiconducting nanotubes. High molecular weight (Mw > 10 000 Da) conjugated moieties usually form the main chain of the copolymers designed for sorting to ensure strong π–π interaction. However, low Mw conjugated polymers are sorting-ineffective because they do not interact with SWCNTs. Additionally, sorted nanotubes in solution aggregate during storage or at low temperatures, possibly due to loss of wrapping ability of the dispersant, and stability of the sorted solution is rarely reported. Here, the effectiveness of polyisoprene with hydrogen-bonding to induce superior sorting and solution stability in a low Mw conjugated polymer is demonstrated. A vinyl-terminated-poly(9,9-dioctylfluorene) (vinyl-PFO, Mw ≈ 4500) copolymerized with polyisoprene with hydrogen-bond containing pendant; Poly(2[[(Butylamino) carbonyl]oxy]ethyl-acrylate, can select large-diameter semiconducting nanotubes (1.17 nm), and the sorted solution remains stable as observed by UV spectroscopy and thin-film transistors, for over a year and at low temperatures; 4, −20, and −80 °C. Furthermore, solution can fabricate ambipolar transistors with averaged charge carrier mobility; 48 cm2 V–1 s–1 for p-type, and 32 cm2 V–1 s–1 for n-type, with retention stability > 6000 s.

原文英語
文章編號2200698
期刊Advanced Electronic Materials
8
發行號12
DOIs
出版狀態已發佈 - 2022 12月

ASJC Scopus subject areas

  • 電子、光磁材料

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