Abstract
We report a new strategy to disperse single-wall carbon nanotubes (SWNTs) via conjugated moiety-containing pendant polymers, poly(2-vinylpyridine)-co-poly(9,9-dihexyl-2-(4-vinylphenyl)-9H-fluorene) (P2VP-co-P(StFl)). The polymer composition ratio and molecular weight were varied to control the SWNT dispersion. The P(St-Fl) segments were adsorbed to the surface of the de-bundled SWNTs through π–π interaction, while the P2VP segments surrounded the outer surfaces of the SWNTs to enhance their solubility and stability. A low-voltage field-effect transistor (FET) was fabricated using a P(St-Fl)-wrapped SWNT network, SWNTs wrapped with P2VP79-co-P(St-Fl)347, and hafnium oxide as the active layer, gate electrode, and dielectric, respectively. The field-effect mobility of the fabricated device was as high as 0.82 cm2 V−1 s−1 on average, with an ON/OFF ratio over 104 under a −5 V bias. This study highlights the tailored wrapping power of pendant polymers, as well as the tunable electrical conducting/semiconducting properties of SWNTs for FET device applications.
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The authors acknowledge final support from Ministry of Science and Technology (MOST) of Taiwan.
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Chang, HC., Wang, JT., Li, DH. et al. Conjugated fluorene-moiety-containing pendant polymers for the dispersion of single-wall carbon nanotubes: polymer wrapping abilities and electrical properties. Polym J 48, 421–429 (2016). https://doi.org/10.1038/pj.2015.122
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DOI: https://doi.org/10.1038/pj.2015.122
