期刊
NATURE COMMUNICATIONS
卷 2, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms1545
关键词
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资金
- Samsung Advanced Institute of Technology
- National Science Foundation (NSF) [ECCS 0901414, OCI-0749217, TG-ASC090004]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [0901414] Funding Source: National Science Foundation
Conjugated polymers, such as polyfluorene and poly(phenylene vinylene), have been used to selectively disperse semiconducting single-walled carbon nanotubes (sc-SWNTs), but these polymers have limited applications in transistors and solar cells. Regioregular poly(3-alkylthiophene)s (rr-P3ATs) are the most widely used materials for organic electronics and have been observed to wrap around SWNTs. However, no sorting of sc-SWNTs has been achieved before. Here we report the application of rr-P3ATs to sort sc-SWNTs. Through rational selection of polymers, solvent and temperature, we achieved highly selective dispersion of sc-SWNTs. Our approach enables direct film preparation after a simple centrifugation step. Using the sorted sc-SWNTs, we fabricate high-performance SWNT network transistors with observed charge-carrier mobility as high as 12 cm(2)V(-1)s(-1) and on/off ratio of > 10(6). Our method offers a facile and a scalable route for separating sc-SWNTs and fabrication of electronic devices.
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