title: Selective dispersion of high purity semiconducting single-walled carbon nanotubes with regioregular poly(3-alkylthiophene)s.
abstract: 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.
authors.affiliation: Department of Chemical Engineering, Stanford University, California 94305, USA.
authors.forename: Hang Woo
authors.initials: HW
authors.lastname: Lee
authors.forename: Yeohoon
authors.initials: Y
authors.lastname: Yoon
authors.forename: Steve
authors.initials: S
authors.lastname: Park
authors.forename: Joon Hak
authors.initials: JH
authors.lastname: Oh
authors.forename: Sanghyun
authors.initials: S
authors.lastname: Hong
authors.forename: Luckshitha S
authors.initials: LS
authors.lastname: Liyanage
authors.forename: Huiliang
authors.initials: H
authors.lastname: Wang
authors.forename: Satoshi
authors.initials: S
authors.lastname: Morishita
authors.forename: Nishant
authors.initials: N
authors.lastname: Patil
authors.forename: Young Jun
authors.initials: YJ
authors.lastname: Park
authors.forename: Jong Jin
authors.initials: JJ
authors.lastname: Park
authors.forename: Andrew
authors.initials: A
authors.lastname: Spakowitz
authors.forename: Giulia
authors.initials: G
authors.lastname: Galli
authors.forename: Francois
authors.initials: F
authors.lastname: Gygi
authors.forename: Philip H-S
authors.initials: PH
authors.lastname: Wong
authors.forename: Jeffrey B-H
authors.initials: JB
authors.lastname: Tok
authors.forename: Jong Min
authors.initials: JM
authors.lastname: Kim
authors.forename: Zhenan
authors.initials: Z
authors.lastname: Bao
mesh_terms: D004581:Electronics / Q000295:instrumentation*; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D012666:Semiconductors / Q000295:instrumentation
chemical_list: D037742:Nanotubes, Carbon; D011108:Polymers
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