| 학회 |
한국고분자학회 |
| 학술대회 |
2014년 가을 (10/06 ~ 10/08, 제주 ICC) |
| 권호 |
39권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
New finding in wetting on soft solid |
| 초록 |
One of the most questionable issues in wetting is the force balance that includes the vertical component of liquid surface tension. On soft solids, the vertical component leads to a microscopic protrusion of the contact line, i.e. a “wetting ridge”. The wetting principle determining the tip geometry of the ridge is at the heart of the issues over the past half-century. Here, we reveal a universal wetting principle from the ridge-tips directly visualized with high spatio-temporal resolution of x-ray microscopy. We find the cusp of the ridge is bent with an asymmetric tip, whose geometry is invariant during ridge growth or by surface softness. This singular asymmetry is deduced by linking the macroscopic and microscopic contact angles to Young and Neuman laws, respectively. Our finding shows this dual-scale approach would be contributable to a general framework in elastowetting and give hints to issues in cell-substrate interaction and elasto-capillary problems. |
| 저자 |
박수지1, 원병묵2, 이지산1, 이준호1, 김진경1, 제정호1
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| 소속 |
1포항공과대, 2성균관대 |
| 키워드 |
elastowetting; wetting ridge; X-ray imaging
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| E-Mail |
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