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Controlled Actuation of Liquid Marbles on a Dielectric
Xiangyu Fu1,2, Yage Zhang1,2, Hao Yuan1,2
1Microfluidics & Soft Matter Group, Department of Mechanical Engineering , University of Hong Kong , Pokfulam Road , Hong Kong.
Abstract:
Motivated by the great potential of droplet microreactors for chemical and biological applications, a general and robust method utilizing an electric field is developed for sustained, directional and two-dimensional manipulation of nonwetting droplets (termed "liquid marbles"). With the understanding of the mechanism of actuation, this method allows individual liquid marbles to be actuated and coalesced on demand by fine-tuning the driving voltage. Moreover, in our system, cross-contamination between marbles during manipulation is avoided as confirmed by the absence of any trace DNA after amplification using a loop-mediated isothermal amplification reaction.
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