title: CoPt/CeO2 catalysts for the growth of narrow diameter semiconducting single-walled carbon nanotubes.
abstract: For the application of single-walled carbon nanotubes (SWNTs) in nanoelectronic devices, effective techniques for the growth of semiconducting SWNTs (s-SWNTs) with a specific diameter are still a great challenge. Herein, we report a facile strategy for the selective growth of narrow diameter distributed s-SWNTs using CoPt/CeO2 catalysts. The addition of Pt into a Co catalyst dramatically reduces the diameter distributions and even the chirality distributions of the as-grown SWNTs. Oxygen vacancies that are provided by mesoporous CeO2 are responsible for creating an oxidative environment to in situ etch metallic SWNTs (m-SWNTs). Atomic force microscope (AFM) and Raman spectroscopy characterizations indicate a narrow diameter distribution of 1.32 ± 0.03 nm and the selective growth of s-SWNTs to 93%, respectively. In addition, electronic transport measurements also confirm that the Ion/Ioff ratio is mainly in the order of ∼10(3). This work provides an effective strategy for the facile fabrication of narrow diameter distributed s-SWNTs, which will be beneficial to fundamental research and the broad application of SWNTs for future nanoelectronics.
authors.affiliation: Division of Advanced Nanomaterials, Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Suzhou 215123, China. ygyao2013@sinano.ac.cn and School of Sciences, Shanghai University, Shanghai 200444, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Tang
authors.affiliation: Division of Advanced Nanomaterials, Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Suzhou 215123, China. ygyao2013@sinano.ac.cn.
authors.forename: Taotao
authors.initials: T
authors.lastname: Li
authors.affiliation: Division of Advanced Nanomaterials, Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Suzhou 215123, China. ygyao2013@sinano.ac.cn and School of Sciences, Shanghai University, Shanghai 200444, China.
authors.forename: Chaowei
authors.initials: C
authors.lastname: Li
authors.affiliation: Division of Advanced Nanomaterials, Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Suzhou 215123, China. ygyao2013@sinano.ac.cn.
authors.forename: Lin
authors.initials: L
authors.lastname: Ling
authors.affiliation: Division of Advanced Nanomaterials, Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Suzhou 215123, China. ygyao2013@sinano.ac.cn.
authors.forename: Kai
authors.initials: K
authors.lastname: Zhang
authors.affiliation: Division of Advanced Nanomaterials, Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Suzhou 215123, China. ygyao2013@sinano.ac.cn.
authors.forename: Yagang
authors.initials: Y
authors.lastname: Yao