title: Biomass-Derived Thermally Annealed Interconnected Sulfur-Doped Graphene as a Shield against Electromagnetic Interference.
abstract: 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.
authors.affiliation: Materials Architecturing Research Center, Korea Institute of Science and Technology , Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea.|Nanomaterials Science and Engineering, University of Science and Technology , 176 Gajung-dong, 217 Gajungro, Yuseong-gu, Daejeon 305-350, Republic of Korea.
authors.forename: Faisal
authors.initials: F
authors.lastname: Shahzad
authors.affiliation: Materials Architecturing Research Center, Korea Institute of Science and Technology , Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea.
authors.forename: Pradip
authors.initials: P
authors.lastname: Kumar
authors.affiliation: R & D Center, Chang Sung Corporation , 11B-9L, Namdong Industrial Area 320, Seunggicheon-ro, Namdong-gu, Incheon 405-846, Republic of Korea.
authors.forename: Yoon-Hyun
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Materials Architecturing Research Center, Korea Institute of Science and Technology , Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea.|Nanomaterials Science and Engineering, University of Science and Technology , 176 Gajung-dong, 217 Gajungro, Yuseong-gu, Daejeon 305-350, Republic of Korea.
authors.forename: Soon Man
authors.initials: SM
authors.lastname: Hong
authors.affiliation: Materials Architecturing Research Center, Korea Institute of Science and Technology , Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea.|Nanomaterials Science and Engineering, University of Science and Technology , 176 Gajung-dong, 217 Gajungro, Yuseong-gu, Daejeon 305-350, Republic of Korea.
authors.forename: Chong Min
authors.initials: CM
authors.lastname: Koo
keywords: biomass; electrical conductivity; electromagnetic interference shielding; graphene; sulfur doping