Thi, Quyen Vu Nguyen, Ngoc Quang Oh, Inwook Hong, Junpyo Koo, Chong Min Tung, Ngo Trinh Sohn, Daewon 2024-01-19T15:02:01Z 2024-01-19T15:02:01Z 2021-09-05 2021-04-01 0272-8842 https://pubs.kist.re.kr/handle/201004/117155 A composite of reduced graphene oxide (rGO) coated with metal-organic framework (MOF) HKUST-1 was synthesized using a facile hydrothermal method. The micro-frame of HKUST-1 was retained with the well decorated octahedral framework on the surface of rGO sheets, resulting in the production of a scabrous, thorny trunk structure. The as-prepared composites exhibited the best shielding effectiveness at a weight ratio of 1:1 of the rGO:Cu(NO3)(2)center dot 3H(2)O precursor, with a total shielding value (SET) greater than 36 dB over a wide frequency range (i.e., from 8.2 to 18 GHz). The maximum SET of the composite exceeded 46.1 dB at 18 GHz, compared to a value of 36.6 dB in pristine rGO. The introduction of the HKUST-1 MOF, which was anchored to the surface of rGO, prevented sheet layers from aggregating and decreased the impedance mismatching by limiting the value of shielding effectiveness by reflection. The mechanism of electromagnetic shielding was attributed mainly to dielectric loss and synergic effects between rGO and HKUST-1. English ELSEVIER SCI LTD Thorny trunk-like structure of reduced graphene oxide/HKUST-1 MOF for enhanced EMI shielding capability Article 10.1016/j.ceramint.2020.12.149 1 CERAMICS INTERNATIONAL, v.47, no.7, pp.10027 - 10034 CERAMICS INTERNATIONAL 47 7 10027 10034 scie scopus 000623984600004 2-s2.0-85098134147 Materials Science, Ceramics Materials Science Article Reduced graphene oxide HKUST-1 Thorny trunk structure Electromagnetic shielding