Biomass-derived thermally annealed interconnected sulfur-doped graphene as a shield against electromagnetic interference
- Biomass-derived thermally annealed interconnected sulfur-doped graphene as a shield against electromagnetic interference
- 홍순만; 구종민; 샤자드 파이잘; Pradip Kumar; Yoon-Hyun Kim
- biomass; electrical conductivity; electromagnetic interference shielding; graphene; sulfur doping
- Issue Date
- ACS Applied Materials & Interfaces
- VOL 8, NO 14, 9361-9369
- Electrically conductive thin carbon materials have attracted remarkable interest as a shielding material to mitigate the electromagnetic interference (EMI) produced by many telecommunication devices. Herein, we developed a sulfur-doped reduced graphene oxide (SrGO) with high electrical conductivity through using a novel biomass, mushroom-based sulfur compound (lenthionine) via a two-step thermal treatment. The resultant SrGO product exhibited excellent electrical conductivity of 311 S cm(-1), which is 52% larger than 205 S cm(-1) for undoped rGO. SrGO also exhibited an excellent EMI shielding effectiveness of 38.6 dB, which is 61% larger than 24.4 dB measured for undoped rGO. Analytical examinations indicate that a sulfur content of 1.95 atom % acts as n-type dopant, increasing electrical conductivity and, therefore, EMI shielding of doped graphene.
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