In this study, a method to remove residual powder on a multi-layered graphene and a new approach to transfer multi-layered graphene at once are studied. A graphene one-step transfer (GOST) method is conducted to minimize the residual powder comparison with a layer-by-layer transfer. Furthermore, a residual powder removing process is investigated to remove residual powder at the top of a multi-layered graphene. After residual powder is removed, the sheet resistance of graphene is decreased from 393 to 340 Ohm/sq in a four-layered graphene. In addition, transmittance slightly increases after residual powder is removed from the top of the multi-layered graphene. Optical and atomic-force microscopy images are used to analyze the graphene surface, and the Ra value is reduced from 5.2 to 3.7 nm following residual powder removal. Therefore, GOST and residual powder removal resolve the limited application of graphene electrodes due to residual powder.

Abstract
 1. 서 론
 2. 실험 방법
  2.1. 그래핀 합성
  2.2. 그래핀 전사 및 잔여분말 박리
  2.3. 그래핀 특성 평가
 3. 결과 및 고찰
  3.1. 전사된 그래핀의 라만 분석
  3.2. 그래핀 층 수 및 잔여분말 박리 여부에 따른 전기 전도도 및 투과도 변화
  3.3. 전사된 그래핀과 잔여분말 제거 공정 후의 표면 분석
 4. 결 론
 References

• 우채영(부산대학교 나노융합기술학과) | Chae-young Woo (Department of Nano Fusion Technology, Pusan National University)
• 조영수(부산대학교 에너지융합기술연구소) | Yeongsu Jo (Research Center of Energy Convergence Technology, Pusan National University)
• 홍순규(부산대학교 나노융합기술학과) | Soon-kyu Hong (Department of Nano Fusion Technology, Pusan National University)
• 이형우(부산대학교 나노융합기술학과, 부산대학교 에너지융합기술연구소, 부산대학교 나노에너지공학과) | Hyung Woo Lee (Department of Nano Fusion Technology, Pusan National University, Research Center of Energy Convergence Technology, Pusan National University, Department of Nanoenergy Engineering, Pusan National University) Corresponding Author