Graphene, a new material with various advantageous properties, has been actively used in various fields in recent years. Applications of graphene oxide are increasing in combination with other materials due to the different properties of graphene oxide, depending on the number of single and multiple layers of graphene. In this study, single-layer graphene oxide and multi-layer graphene oxide are spray coated on polystyrene, and the physicochemical properties of the coated surfaces are characterized using SEM, Raman spectroscopy, AFM, UV-Vis spectrophotometry, and contact angle measurements. In singlelayer graphene oxide, particles of 20 μm are observed, whereas a 2D peak is less often observed, and the difference in surface height increases according to the amount of graphene oxide. Adhesion increases with an increase in graphene oxide up to 0.375 mg, but decreases at 0.75 mg. In multi-layer graphene oxide, particles of 5 μm are observed, as well as a 2D peak. According to the amount of graphene oxide, the height difference of the surface increases and the adhesive strength decreases. Both materials are hydrophilic, but single-layer graphene oxide has a hydrophilicity higher than that of multi-layer graphene oxide. We believe that multi-layer graphene oxide and single-layer graphene oxide can be implemented based on the characteristics that make them suitable for application.

Abstract
1.서 론
2. 실험방법
    2.1 재료 및 코팅
    2.2 분석
3. 결과 및 고찰
    3.1 산화그래핀이 코팅된 폴리스타이렌 표면 관찰 및구조분석
    3.2 산화그래핀이 코팅된 표면의 높낮이 차이 및 접착력 측정
    3.3 투과도 분석
    3.4 접촉각 분석
4.결 론
References

• 이지훈(경북대학교 융복합시스템공학과) | Jihoon Lee (School of Convergence & Fusion System Engineering, Kyungpook National University)
• 박재범(경북대학교 융복합시스템공학과) | Jaebum Park (School of Convergence & Fusion System Engineering, Kyungpook National University)
• 박단비(경북대학교 국제재생의학연구소) | Danbi Park (Joint Institute for Regenerative Medicine, Kyungpook National University)
• 허증수(경북대학교 융복합시스템공학과) | Jeung Soo Huh (School of Convergence & Fusion System Engineering, Kyungpook National University)
• 임정옥(경북대학교 국제재생의학연구소/경북대학교 의학과/경북대학교 병원 생명의학연구소) | Jeong Ok Lim (Joint Institute for Regenerative Medicine, Kyungpook National University/Biomedical Research Institute, Kyungpook National University Hospital, School of Medicine, Kyungpook National University) Corresponding author