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 (M_w > 10 000 Da) conjugated moieties usually form the main chain of the copolymers designed for sorting to ensure strong π–π interaction. However, low M_w 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, M_w ≈ 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.

中文翻译：

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低分子量共轭聚合物与氢键聚异戊二烯分选高稳定性单壁碳纳米管

共轭聚合物与单壁碳纳米管 (SWCNT) 之间的 π-π 相互作用是半导体纳米管分散和选择的关键。高分子量 ( Mw > 10 000 Da) 共轭部分通常形成共聚物_的 主链，用于分选以确保强 π-π 相互作用。然而，_低Mw共轭聚合物分选无效，因为它们不与单壁碳纳米管相互作用。此外，溶液中分选的纳米管在储存期间或低温下聚集，这可能是由于分散剂的包裹能力丧失，分选溶液的稳定性很少被报道。在这里，证明了具有氢键的聚异戊二烯在低 Mw 共轭聚合物中诱导优异分选和溶液稳定性的有效性。乙烯基封端聚（9,9-二辛基芴）（乙烯基-PFO，M _w≈ 4500) 与含氢键侧链的聚异戊二烯共聚；Poly(2[[(Butylamino) carbonyl]oxy]ethyl-acrylate，可选择大直径半导体纳米管（1.17 nm），分选后的溶液在紫外光谱和薄膜晶体管观察下保持稳定，超过一年和在低温下；4、-20 和 -80 °C。此外，该解决方案可以制造具有平均电荷载流子迁移率的双极晶体管；48 cm ²  V ^–1  s ^–1用于 p 型，32 cm ²  V ^–1  s ^–1表示 n 型，保留稳定性 > 6000 s。