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연구성과 > 금주의 우수논문

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SCI Article

Controlled Grafting of Colloidal Nanoparticles on Graphene through Tailored Electrostatic Interaction
성명 좌용호 ()
소속 공학대학 재료화학공학과
캠퍼스
우수선정주 2019년 04월 3째주
Author Kim, Han (Dept Mat Sci & Chem Engn); 좌용호 (Dept Mat Sci & Chem Engn) corresponding author;
Corresponding Author Info Son, JS (reprint author), UNIST, Sch Mat Sci & Engn, Ulsan 44919, South Korea.; Kim, KH (reprint author), Yeungnam Univ, Dept Phys, Gyongsan 38541, South Korea.; Choa, YH (reprint author), Hanyang Univ, Dept Mat Sci & Chem Engn, Ansan 15588, South Korea.
E-mail 이메일choa15@hanyang.ac.kr
Document Type Article
Source ACS APPLIED MATERIALS & INTERFACES Volume:11 Issue:12 Pages:11824-11833 Published:2019
Times Cited 0
External Information http://dx.doi.org/10.1021/acsami.9b01519
Abstract Nanoparticle/graphene hybrid composites have been of great interest in various disciplines due to their unique synergistic physicochemical properties. In this study, we report a facile and generalized synthesis method for preparing nanoparticle/exfoliated graphene (EG) composites by tailored electrostatic interactions. EG was synthesized by an electrochemical method, which produced selectively oxidized graphene sheets at the edges and grain boundaries. These EG sheets were further conjugated with polyethyleneimine to provide positive charges at the edges. The primary organic ligands of the colloidal nanoparticles were exchanged with Cl- or MoS42- anions, generating negatively charged colloidal nanoparticles in polar solvents. By simple electrostatic interactions between the EG and nanoparticles in a solution, nanoparticles were controllably assembled at the edges of the EG. Furthermore, the generality of this process was verified for a wide range of nanoparticles, such as semiconductors, metals, and magnets, on the EG. As a model application, designed composites with size-controlled FeCo nanoparticle/EG were utilized as electromagnetic interference countermeasure materials that showed a size-dependent shift of the frequency ranges on the electromagnetic absorption properties. The current generalized process will offer great potential for the large-scale production of well-designed graphene nanocomposites for electronic and energy applications.
Web of Science Categories Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
Funding Nano-Material Technology Development Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT (MSIT) [NRF-2016M3A7B4900044, NRF-2018M3A7B8060697]; UNIST (Ulsan National Institute of Science and Technology) [1.180028.01
Language English
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