Superposition of Translational and Rotational Motions under Self-Propulsion of Liquid Marbles Filled with Aqueous Solutions of Camphor

被引：23

作者：

Bormashenko, Edward ^{[1
]}

Frenkel, Mark ^{[1
]}

Bormashenko, Yelena ^{[1
]}

Chaniel, Gilad ^{[2
]}

Valtsifer, Viktor ^{[3
]}

Binks, Bernard P. ^{[4
]}

机构：

[1] Ariel Univ, Chem Engn Biotechnol & Mat Dept, POB 3, IL-40700 Ariel, Israel

[2] Ariel Univ, Dept Phys, POB 3, IL-40700 Ariel, Israel

[3] RAS, UB, Inst Tech Chem, Acad Korolev St,3, Perm 614013, Russia

[4] Univ Hull, Sch Math & Phys Sci, Kingston Upon Hull HU6 7RX, N Humberside, England

来源：

LANGMUIR | 2017年 / 33卷 / 46期

关键词：

EVAPORATION RATE; GRADIENT; DRIVEN; DROPS; PARTICLES; MOTILITY; DROPLETS; BEHAVIOR;

D O I：

10.1021/acs.langmuir.7b03356

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Self-locomotion of liquid marbles, coated with lycopodium or fumed fluorosilica powder, filled with a saturated aqueous solution of camphor and placed on a water/vapor interface is reported. Self-propelled marbles demonstrated a complicated motion, representing a superposition of translational and rotational motions. Oscillations of the velocity of the center of mass and the angular velocity of marbles, occurring in the antiphase, were registered and explained qualitatively. Self-propulsion occurs because of the Marangoni solutocapillary flow inspired by the adsorption of camphor (evaporated from the liquid marble) by the water surface. Scaling laws describing translational and rotational motions are proposed and checked. The rotational motion of marbles arises from the asymmetry of the field of the Marangoni stresses because of the adsorption of camphor evaporated from marbles.

引用

页码：13234 / 13241

页数：8

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