| 학회 |
한국공업화학회 |
| 학술대회 |
2020년 가을 (10/28 ~ 10/30, 광주 김대중컨벤션센터(Kimdaejung Convention Center)) |
| 권호 |
24권 1호 |
| 발표분야 |
[콜로이드·계면화학] 콜로이드계면화학의 최신 연구동향 및 응용 |
| 제목 |
Demonstration of unusual colloidal interaction via optical laser tweezers: Dipole-induced dipole attraction due to counterion rearrangements around colloidal particles near the oil-water interface |
| 초록 |
We use the optical laser tweezer apparatus to investigate the dipole-induced dipole attraction between colloidal particles that has not been reported yet. We postulate that the perpendicular electric dipole formed around a particle at an oil-water interface leads to rearrangements of surrounding counterions in the aqueous phase. The rearrangements can cause unexpected attractions when another particle dispersed in water approaches the interface-trapped particle nearby. We quantitatively measure the dipole-induced dipole electrostatic interactions and the critical time of counterion migration for generating the attractive force that can overcome the double layer interaction as well as the thermal fluctuation. |
| 저자 |
박범준 |
| 소속 |
경희대 |
| 키워드 |
colloid; interaction; interface; optical laser tweezers
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| E-Mail |
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