내부 연결 그룹이 다른 폴리이미드 상 레이저 유도 그래핀 전극 직접 성장

• Published in: 한국섬유공학회지 Vol. 60; no. 6; pp. 375 - 382
• Main Authors: 손정민, Jeong Min Sohn, 황윤찬, Yun Chan Hwang, 박재희, Jae Hui Park, 남기호, Ki-ho Nam
• Format: Journal Article
• Language: Korean
• Published: 한국섬유공학회 31.12.2023
• Subjects: electrical conductivity; heteroatom-doping; laser processing parameter; laser-induced graphene; polyimide; 섬유공학; polyimide; electrical conductivity; heteroatom-doping; laser-induced graphene; laser processing parameter
• ISSN: 1225-1089; 2288-6419

We present a facile direct-writing heteroatom-doped graphene on molecularly controlled polyimides using a continuous-wave CO 2 infrared laser scriber. We first synthesized polyimide (PI) films with various internal linkages such as phenylene, trifluoromethyl, and sulfone groups by conventional two-step polycondensation of 4,4'-oxydianiline with three different tetracarboxylic dianhydrides. The development of graphene from each PI film surfaces was confirmed by characterizing the heteroatom-doped (N-doped, F-doped, and S-doped) laser-induced graphene (LIG) layers. We found that both laser processing parameters (e.g., laser power and scan speed) and chemical backbones of PIs had a large influence on the formation and quality of the LIG, investigated in terms of the ID/IG and I2D Raman bands, crystalline size, surface composition, and sheet resistance. A small amount of heteroatom-doping derived from the PI backbones might easily control the electrical conductivity of LIG electrode. It is predicted that the LIG developed according to the obtained results can offer new opportunities for the required simple, low-cost, and flexible electronics and sensors.