Biomass-derived thermally annealed interconnected sulfur-doped graphene as a shield against electromagnetic interference

Title
Biomass-derived thermally annealed interconnected sulfur-doped graphene as a shield against electromagnetic interference
Authors
홍순만구종민샤자드 파이잘Pradip KumarYoon-Hyun Kim
Keywords
biomass; electrical conductivity; electromagnetic interference shielding; graphene; sulfur doping
Issue Date
2016-04
Publisher
ACS Applied Materials & Interfaces
Citation
VOL 8, NO 14, 9361-9369
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.
URI
http://pubs.kist.re.kr/handle/201004/59244
ISSN
19448244
Appears in Collections:
KIST Publication > Article
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