Biomass-Derived Thermally Annealed Interconnected Sulfur-Doped Graphene as a Shield against Electromagnetic Interference

Faisal Shahzad, Pradip Kumar, Yoon Hyun Kim, Soon Man Hong, Chong Min Koo

Research output: Contribution to journalArticle

51 Citations (Scopus)

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 languageEnglish
Pages (from-to)9361-9369
Number of pages9
JournalACS Applied Materials and Interfaces
Volume8
Issue number14
DOIs
Publication statusPublished - 2016 Apr 27
Externally publishedYes

Keywords

  • biomass
  • electrical conductivity
  • electromagnetic interference shielding
  • graphene
  • sulfur doping

ASJC Scopus subject areas

  • Materials Science(all)

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