Method for regulating arrangement of nanoparticles at three-phase interface based on microfluidic chip

A method for regulating arrangement of nanoparticles at a three-phase interface on a microfluidic chip, comprising following steps:

• Step S1:
• preprocessing a microfluidic chip;
• Step S2:
• preparing three-phase fluids of water, gas and oil and injecting into fluid inlets of the microfluidic chip by utilizing high-precision injection pumps to form a three-phase interface;
• Step S3:
• preparing a nanoparticle solution and injecting into a nanoparticle capture region of the microfluidic chip;
• Step S4:
• controlling arrangement and concentration of the nanoparticle solution by adjusting an electric field of the microfluidic chip;
• Step S5:
• monitoring stability of the three-phase fluids and behaviors of the nanoparticle solution at the three-phase interface in real time by utilizing a microscope and sensors, and collecting data of the behaviors;
• Step S6:
• analyzing and evaluating the data of the behaviors collected in the Step S5, and adjusting and optimizing according to analyzed and evaluated data;
• and
• Step S7:
• cleaning the microfluidic chip.