| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 가을 (10/20 ~ 10/22, 경주컨벤션센터) |
| 권호 |
46권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Spontaneous, Selective Wetting of Liquid Metal Induced by Surface Topography on a Metallic Surface |
| 초록 |
Gallium-based liquid metal alloys (GaLMs) have been actively studied as stretchable or deformable electronics due to low melting point, high electrical conductivity, low toxicity, and high deformability. Gallium oxide skin formed on the surface of GaLMs enables to be spread or be stabilized in non-spherical shapes. So, controlling the interfacial characteristics of GaLMs is critical to utilize in various applications. Here, we investigated contact angles of EGaIn on various substrates and demonstrated the spontaneous, selective wetting of liquid metal on the micro-structured surface sputtered with metal in HCl vapor. This phenomenon can be numerically explained based on Wenzel’s model and imbibition process. In our method, uniform and large-area deposition or patterning of GaLMs without applying external force was realized. Finally, we demonstrated that the GaLMs-patterned substrates maintain electrical connectivity even in a stretched state and after repetitive stretching cycles. |
| 저자 |
김지혜1, 김수영1, 김현진2, 우상혁2, Michael D. Dickey3, 조지웅4, 소주희5, 구형준1
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| 소속 |
1서울과학기술대, 2중앙대, 3North Carolina State Univ., 4한국기초과학지원(연), 5한국생산기술(연) |
| 키워드 |
Liquid metal; EGaIn; Spontaneous wetting; Selective wetting
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| E-Mail |
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