Conjugated fluorene-moiety-containing pendant polymers for the dispersion of single-wall carbon nanotubes: Polymer wrapping abilities and electrical properties

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Title:	Conjugated fluorene-moiety-containing pendant polymers for the dispersion of single-wall carbon nanotubes: Polymer wrapping abilities and electrical properties
Authors:	劉振良;Chang, Hsuan-Chun;Wang, Jau-Tzeng;Li, Dian-Han;Lu, Chien;Hsu, Han-Wen;Wu, Hung-Chin;Liu, Cheng-Liang;Chen, Wen-Chang
Contributors:	工學院化學工程與材料工程學系
Keywords:	140/131;140/133;639/638/455/941;639/638/455/957;Biomaterials;Bioorganic Chemistry;Chemistry;Chemistry and Materials Science;Chemistry/Food Science;Devices;Dispersions;Field effect transistors;Jewelry;original-article;Polymer Sciences;Polymers;Semiconductor devices;Single wall carbon nanotubes;Surfaces and Interfaces;Thin Films;Wrapping
Date:	2016-04-01
Issue Date:	2026-04-21 14:50:31 (UTC+8)
Publisher:	Nature Publishing Group;London: Nature Publishing Group UK
Abstract:	摘要： 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)-9 H -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 P2VP 79 - 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 cm 2 V −1 s −1 on average, with an ON/OFF ratio over 10 4 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. The wrapping abilities of comb-like polymers with pendant conjugated fluorine moieties and their tunable electrical properties of SWNTs were discussed. It is found that longer side-chain-conjugated fluorene segments in homopolymer (P(St-Fl) 300 , 7 ) can strongly bind to the SWNTs surfaces through π – π interaction and its copolymer (P2VP 79 - co -P(St-Fl) 347 , 5a ) lead to predominant dispersion of SWNTs due to the flexibility of P2VP for further increasing the solubility. Thus, SWNTs wrapped by 5a after thermal annealing can be selected as a gate electrode, whereas the spin-coated SWNTs wrapped by 7 can be as a semiconductor for the FET channel, resulting in a mobility of 0.82 cm 2 V −1 s −1 , a threshold voltage of 0.35 V and an ON/OFF ratio of 2.8 × 10 4 . 其他題名： Polym J 出版者： London: Nature Publishing Group UK 出版日期： 2016-04-01 出處： Polymer journal, 2016-04, Vol.48 (4), p.421-429 版權： The Society of Polymer Science, Japan 2016 版權： Copyright Nature Publishing Group Apr 2016 識別號： ISSN: 0032-3896 識別號： ISSN: 1349-0540 識別號： EISSN: 1349-0540 識別號： DOI: 10.1038/pj.2015.122
Appears in Collections:	[Department of Chemical and Materials Engineering] journal & Dissertation

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