Kim, Seung-Il Kim, Jin-Su Moon, Ji-Yun Hyeong, Seok-Ki Ghods, Soheil Choi, Jun-Hui Kim, Dasol Park, Dong Seop Heo, Keun Lee, Jae-Hyun 2024-01-19T08:30:26Z 2024-01-19T08:30:26Z 2023-10-29 2023-11 0379-6779 https://pubs.kist.re.kr/handle/201004/113128 The research on graphene, driven by its exceptional mechanical, electrical, and thermal properties, has garnered significant attention, making it a promising multi-functional material for electronics. In this study, we investigated the effect of the synthesis temperature on the crystalline quality and the electromagnetic interference (EMI) shielding performance of graphene. We performed graphene synthesis on Cu foil at different temperatures (from 900 degrees to 1050 degrees C) and subsequently analyzed the samples using Raman spectroscopy. The results showed that the crystalline quality of graphene increased with increasing synthesis temperature. We then fabricated a 100-layer graphene/poly(methyl methacrylate) (PMMA) composite (GPC) and evaluated its electrical, mechanical properties, and EMI shielding effectiveness (SE). Our findings revealed the GPC with high crystalline graphene had a higher electrical conductivity and tensile strength than the GPC with defective graphene. In addition, the GPC with high crystalline graphene had a higher EMI SE, with a total SE of 14.16 dB, which is 140 % higher than that value for a defective graphene structure. English Elsevier BV Electromagnetic interference shielding of graphene/PMMA composites depending on growth temperature of CVD-graphene Article 10.1016/j.synthmet.2023.117464 1 Synthetic Metals, v.299 Synthetic Metals 299 N scie scopus 001076851800001 2-s2.0-85170649969 Materials Science, Multidisciplinary Physics, Condensed Matter Polymer Science Materials Science Physics Polymer Science Article FILMS ABSORPTION Graphene Composite EMI shielding CVD synthesis Crystalline quality