The co-flowing two phases are running as laminar layers side by side with the two-phase interface in between possesses a wavy morphology.
Published in Chapter:
Immiscible Two-Phase Parallel Microflow and Its Applications in Fabricating Micro- and Nanomaterials
Yujie Li (Harbin Institute of Technology at Weihai, China), Jie Wang (Harbin Institute of Technology at Weihai, China), Shijie Wang (Harbin Institute of Technology at Weihai, China), Di Li (Harbin Institute of Technology at Weihai, China), Shan Song (Harbin Institute of Technology at Weihai, China), Peng Zhang (Harbin Institute of Technology at Weihai, China), Jianguo Li (Xi'an Microelectronic Technology Institute, China), and Hai Yuan (Xi'an Microelectronic Technology Institute, China)
Copyright: © 2019
|Pages: 31
DOI: 10.4018/978-1-5225-7138-4.ch005
Abstract
The immiscible two-phase flow behaves nonlinearly, and it is a challenging task to control and stabilize the liquid-liquid interface. Parallel flow forms under a proper balance between the driving force, the friction resistance, and the interfacial tension. The liquid-solid interaction as well as the liquid-liquid interaction plays an important role in manipulating the liquid-liquid interface. With vacuum-driven flow, long and stable parallel flow is possible to be obtained in oil-water systems and can be used for fabricating micro- and nanomaterials. Ultra-small Cu nanoparticles of 4~10 nm were synthesized continuously through chemical reactions taking place on the interface. This makes it possible for in situ synthesis of conductive nanoink avoiding oxidation. Well-controlled interface reactions can also be used to produce ultra-long sub-micro Cu wires up to 10 mm at room temperature. This method provided new and simple additive fabrication methods for making integrated microfluidic devices.