Electromagnetic Interference Shielding Efficiency Characteristics of Ammonia-treated Graphene Oxide

암모니아수 처리된 그래핀 옥사이드의 전자파 차폐효율 특성

  • Park, Mi-Seon (Department of Applied Chemistry and Biological Engineering, Chungnam National University) ;
  • Yun, Kug Jin (Department of Applied Chemistry and Biological Engineering, Chungnam National University) ;
  • Lee, Young-Seak (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
  • 박미선 (충남대학교 대학원 바이오응용화학과) ;
  • 윤국진 (충남대학교 대학원 바이오응용화학과) ;
  • 이영석 (충남대학교 대학원 바이오응용화학과)
  • Received : 2014.09.12
  • Accepted : 2014.09.29
  • Published : 2014.12.10


In this study, nitrogen doped graphene oxide (GO) was prepared using liquid phase ammonia treatment to improve its electrical properties. Also, the aminated GO was manufactured into a film format and the electromagnetic interference (EMI) shielding efficiency was measured to evaluate its electrical properties. The XPS result showed that the increase of liquid phase ammonia treatment concentration led to the increased nitrogen functional group on the GO surface. The measurement of EMI shielding efficiency reveals that EMI shielding efficiency of the liquid phase ammonia treated GO was better than that of non-treated GO. When GO was treated using the ammonia solution of 21% concentration, the EMI shielding efficiency increased by -5 dB at higher than 2950 MHz. These results were maybe due to the fact that nitrogen functional groups on GO help to improve the absorbance of electromagnetic waves via facile electron transfer.


graphene oxide;nitrogen doping;liquid phase ammonia treatment;EMI shielding efficiency


Supported by : 충남대학교


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