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General Information
    • ISSN: 1793-8198
    • Frequency: Quarterly
    • DOI: 10.18178/IJMMM
    • Editor-in-Chief: Prof. K. M. Gupta, Prof. Ian McAndrew
    • Executive Editor: Ms. Cherry L. Chen
    • Abstracting/Indexing: EI (INSPEC, IET), Chemical Abstracts Services (CAS),  ProQuest, Crossref, Ulrich's Periodicals Directory,  etc.
    • E-mail ijmmm@ejournal.net
Editor-in-chief
Prof. Ian McAndrew
Capitol Technology University, USA
It is my honor to be the editor-in-chief of IJMMM. I will do my best to help develop this journal better.

IJMMM 2015 Vol.3(3): 187-190 ISSN: 1793-8198
DOI: 10.7763/IJMMM.2015.V3.193

Formation and Storage of on Demand Water-in-oil Picoliter Droplets Actuated by Microfluidic Pulse Inertia Force

Hongcheng Wang, Weiyi Zhang, Jia Liu, and Zhendong Dai
Abstract—Droplet generating in an immiscible liquid is the core technology of the droplet based biochemistry analysis. A new method, not based on micro-fluidic chip, is here proposed to produce micro scale aqueous phase droplets in oil phase liquid. The principle of the droplet generator is to actuate a hollow PZT stack by a signal generator and a voltage amplification to provide an enough pulse inertia force for a glass micro-nozzle and aqueous phase liquid inside to eject droplets. The minimum diameter of the produced spherical droplets is below 10 μm, which is below 1 pL. The range of droplets formation frequency is 2 Hz~50 Hz. A fused silica capillary is used to store the produced droplets by a designed low-pressure suction apparatus and the distance between the neighboring droplets is controlled by the low-pressure value. The proposed method in this article may be a promising approach for droplet-based single cell encapsulating and analyzing.

Index Terms—Microfluids, emulsions, pulse inertia force, picoliter droplets.

Hongcheng Wang and Zhendong Dai are with the Institute of Bio-inspired Structure and Surface Engineering, Nanjing University of Aeronautics and Astromautics, Nanjing, CO 210016, China (e-mail: whch31@163.com, zddai@nuaa.edu.cn).
Weiyi Zhang and Jia Liu are with the School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, CO 210094, China (e-mail: zhangweiyi_email@163.com, njustliujia@gmail.com).

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Cite: Hongcheng Wang, Weiyi Zhang, Jia Liu, and Zhendong Dai, "Formation and Storage of on Demand Water-in-oil Picoliter Droplets Actuated by Microfluidic Pulse Inertia Force," International Journal of Materials, Mechanics and Manufacturing vol. 3, no. 3, pp. 187-190, 2015.

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