Enhanced Chemical Reactivity of Graphene by Fermi Level Modulation
- 주제(기타) Chemistry, Physical; Materials Science, Multidisciplinary
- 설명문(일반) [Park, Myung Jin; Lee, Jae Yoon; Lee, Chul-Ho] Korea Univ, KU KIST Grad Sch Converging Sci & Technol, 145 Anam Ro, Seoul 02841, South Korea; [Choi, Hae-Hyun; Park, Baekwon; Choi, Yong Seok; Yoo, Je Min; Hong, Byung Hee] Seoul Natl Univ, Dept Chem, 1 Gwanak Ro, Seoul 08826, South Korea; [Kim, Youngsoo] Seoul Natl Univ, Interuniv Semicond Res Ctr, Graphene Sq Inc, 1 Gwanak Ro, Seoul 08826, South Korea; [Lee, Hyukjin] Ewha Womans Univ, Coll Pharm, 11-1 Daehyun Dong, Seoul 120750, South Korea; [Park, Myung Jin] Univ Toronto, Dept Chem, 80 St George St, Toronto, ON M5S 3H6, Canada
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2018
- URI http://www.dcollection.net/handler/ewha/000000156578
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/acs.chemmater.8b01614
초록/요약
Among various approaches to modify the electronic and chemical properties of graphene, functionalization is one of the most facile ways to tailor these properties. The rearranged structure with covalently bonded diazonium molecules exhibits distinct semiconducting property, and the attached diazonium enables subsequent chemical reactions. Notably, the rate of diazonium functionalization depends on the substrate and the presence of strain. Meanwhile, according to the Gerischer-Marcus theory, this reactivity can be further tuned by adjusting the Fermi level. Here, we precisely controlled the Fermi level of graphene by introducing the self-assembled monolayer (SAM) and investigated the degree of chemical reactivity of graphene with respect to the doping types. The n-doped graphene exhibited the highest reactivity not only for diazonium molecules but also for metal ions. The increased reactivity is originated from a remarkable electron donor effect over the entire area. In addition, the n-doped graphene enabled spatially patterned functionalization of diazonium molecules, which was further utilized as a growth template for gold particles that would be advantageous for enhanced electrochemical reactivity.
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