Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Effect of Amine Compounds on Electrical Properties of Graphene Oxide Films made by Bar Coating

바코팅에 의해 제조된 그래핀 옥사이드 필름의 전기적 특성에 미치는 아민 화합물의 영향

  • Received : 2015.03.10
  • Accepted : 2015.04.08
  • Published : 2015.06.10
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Abstract

We prepared films by a bar-coating of various graphene oxide (GO) pastes by varying pH with amine compounds. The thermal treatment of films at $150^{\circ}C$ and measurement of surface resistances exhibited that the pH variation does not significantly affect the surface resistance. We, however, found that the addition of amines reduced the surface resistance by approximately 10 times and N,N-dimethylethanolamine (DMEA) showed the most significant effect among all amines investigated. XPS studies demonstrated that the addition of DMEA accelerated the reduction reaction of GO, and finally enhanced the electrical properties of GO films.

아민 화합물로 pH를 변화시킨 산화 그래핀(Graphene oxide, GO) 페이스트를 바코팅하여 필름으로 제작하고 전기적 특성을 연구하였다. 필름을 $150^{\circ}C$에서 열처리한 후 표면저항을 측정한 결과, pH의 변화에 따라 표면저항 값에는 큰 차이가 없었다. 그러나 아민 화합물의 첨가에 의해서 표면저항이 약 10배 정도 감소하였으며, 아민 화합물 중에서도 N,N-dimethylethanolamine (DMEA)에 의한 효과가 가장 크게 나타났다. XPS 측정을 통해서 관련성을 분석한 결과, GO 필름 및 DMEA를 첨가한 GO 필름 모두 환원반응이 진행된 것으로 나타났으나, DMEA를 첨가한 경우에는 환원 반응이 촉진되었으며 궁극적으로 GO 필름의 전기적 특성을 향상시키는 것으로 밝혀졌다.

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References

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