期刊
LANGMUIR
卷 31, 期 42, 页码 11502-11507出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.5b02917
关键词
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资金
- National Natural Science Foundation of China [51301139]
- Specialized Research Fund for the Doctoral Program of Higher Education [20126102120058]
- Northwestern Polytechnical University [Z2015158]
Liquid marbles have promising applications in the field of microreactors, where the opening and closing of their surfaces plays a central role. We have levitated liquid water marbles using an acoustic levitator and, thereby, achieved the manipulation of the particle shell in a controlled manner. Upon increasing the sound intensity, the stable levitated liquid marble changes from a quasi-sphere to a flattened ellipsoid. Interestingly, a cavity on the particle shell can be produced on the polar areas, which can be completely healed when decreasing the sound intensity, allowing it to serve as a microreactor. The integral of the acoustic radiation pressure on the part of the particle surface protruding into air is responsible for particle migration from the center of the liquid marble to the edge. Our results demonstrate that the opening and closing of the liquid marble particle shell can be conveniently achieved via acoustic levitation, opening up a new possibility to manipulate liquid marbles coated with non-ferromagnetic particles.
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