Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 2, Pages 1273-1279Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b09952
Keywords
remote manipulation; liquid droplet; photothermal nanoparticles; liquid marble; NIR laser
Funding
- self-planned task of the State Key Laboratory of Robotics and System of Harbin Institute of Technology [SKLRS200901C]
- National Natural Science Foundation of China [51473041]
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Facile manipulation of a tiny liquid droplet is an important but challenging issue for many miniaturized chemical and biological systems. Here we report that a microdroplet can be readily and remotely manipulated in aqueous environments under ambient conditions. The droplet is encapsulated with photothermal nanoparticles to form a liquid marble, and subsequently irradiated with a near-infrared (NIR) laser. The marble is able to ascend, shuttle, horizontally move, and even suspend in water by simply controlling the laser irradiation. Moreover, filling and draining of the marble can also be conducted on the water surface for the first time. This facile manipulation strategy does not use complicated nanostructures or sophisticated equipment, so it has potential applications for channel-free microfluidics, smart microreators, microengines, microrobots, and so on.
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