This paper reports the pH effect of reduced graphene oxide (RGO) colloids on formation of three dimensional (3D) graphene network in nucleate boiling condition, so called boiling method. When nucleated bubbles grow on the hot surface, thin liquid film beneath the bubble is supposed to be dried, in which RGO flakes become close to each other and form a structure. Accordingly, what happened when they are in high particle density would be a key issue for the formation of 3D graphene network. Here, we changed pH and oxidation level of RGO colloids so that their effect was observed on extent of 3D graphene network after boiling method. As pH was lower, i.e. being acid, the RGO colloids become unstable, resulting in 3D structure rather than 2D structure. Similarly, As oxidation level was lower, i.e. being more reduced, it showed a tendency to form 3D structure.

ABSTRACT
 1. 서 론
 2. 실 험
  2.1 그래핀 콜로이드 제법
  2.2 실험장치 및 실험방법
  2.3 비등에 의한 3차원 그래핀 형성 메커니즘
 3. 실험결과 및 토의
 4. 결 론
 후 기
 References

• 이길원(Dept. of Mechnical Engineering, Incheon National University) | Gil-Won Lee
• 김지민(Dept. of Technology Education, Korea National University of Education) | Ji-Min Kim Corresponding Author