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.
Original language | English |
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Pages (from-to) | 9361-9369 |
Number of pages | 9 |
Journal | ACS Applied Materials and Interfaces |
Volume | 8 |
Issue number | 14 |
DOIs | |
Publication status | Published - 2016 Apr 27 |
Externally published | Yes |
Keywords
- biomass
- electrical conductivity
- electromagnetic interference shielding
- graphene
- sulfur doping
ASJC Scopus subject areas
- Materials Science(all)