Large-scale separation of single-walled carbon nanotubes by electronic type using click chemistry
- 주제(키워드) SWCNT separation , sc-SWCNT , m-SWCNT , Click chemistry , Copper catalyst , 1 , 3 dipolar cycloaddition
- 주제(기타) Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter
- 설명문(일반) [Um, Jo-Eun; Kim, Woo-Jae] Gachon Univ, Dept Chem & Biol Engn, Seongnam 13120, Gyeonggi Do, South Korea; [Song, Sun Gu; Song, Changsik] Sungkyunkwan Univ, Dept Chem, Suwon 16419, Gyeonggi Do, South Korea; [Yoo, Pil J.] Sungkyunkwan Univ, Sch Chem Engn, Suwon 16419, Gyeonggi Do, South Korea
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- 발행기관 ELSEVIER SCIENCE BV
- 발행년도 2018
- URI http://www.dcollection.net/handler/ewha/000000160548
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.apsusc.2017.06.002
초록/요약
Single-walled carbon nanotubes (SWCNTs) can be either metallic or semiconducting, making their separation critical for applications in nanoelectronics, biomedical materials, and solar cells. Herein, we investigate a novel solution-phase separation method based on click chemistry (azide-alkyne Huisgen cycloaddition) and determine its efficiency and scalability. In this method, metallic SWCNTs in metallic/semiconducting SWCNT mixtures are selectively functionalized with alkyne groups by being reacted with 4-propargyloxybenezenediazonium tetrafluoroborate. Subsequently, silica nanoparticles are functionalized with azide groups and reacted with alkyne-bearing metallic SWCNTs in the SWCNT mixture in the presence of a Cu catalyst. As a result, metallic SWCNTs are anchored on silica powder, whereas non-functionalized semiconducting SWCNTs remain in solution. Low-speed centrifugation effectively removes the silica powder with attached metallic SWCNTs, furnishing a solution of highly pure semiconducting SWCNTs, as confirmed by Raman and UV-vis/near-infrared absorption measurements. This novel separation scheme exhibits the advantage of simultaneously separating both metallic and semiconducting SWCNTs from their mixtures, being cost-effective and therefore applicable at an industrial scale. (C) 2017 Elsevier B.V. All rights reserved.
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