Microfluidics is an interdisciplinary and innovative research field that integrates knowledge and technology from multiple disciplines such as biology, chemistry, medicine, fluid mechanics, materials science, mechanical engineering and electronics. As a natural science, this technology focuses on studying the mechanical behavior of fluids through microchannels with sizes ranging from tens to hundreds of microns. At the same time, it is also a system technology that uses miniaturized devices to precisely manipulate microfluids with volumes ranging from microliters to nanoliters.

　　The basic principle of microfluidics involves introducing fluids into tiny channels and using microstructures such as microvalves, pumps and mixers to control the flow and reaction process of the fluids. These microstructures are usually manufactured by micro-nanofabrication technologies, such as photolithography and electron beam lithography. By precisely adjusting the switching time and frequency of microvalves and pumps, complex fluid operations can be achieved in microchannels, including mixing, transportation and separation processes.

　　In the field of biomedical research, microfluidic systems have been widely used, especially in cell analysis and diagnosis. Taking single-cell analysis as an example, traditional analysis methods often require a large amount of samples and reagents, while the technology can capture and separate single cells, thereby improving the accuracy of the analysis. In addition, the system can also achieve directional culture and transfer of cells, which provides a powerful tool for the in-depth development of cell research.

　　微流控系统在时间和空间上为分子浓度控制提供了全新的技术解决方案。与传统方法相比，微流控系统具有以下几个显著优点：

　　1. Small sample volume and high precision: The system can obtain highly efficient analysis results with very small sample volumes. For example, in chemical reactions, a cubic millimeter of liquid is sufficient for effective reactions. Due to the small size of the microchannel and the small volume of the reaction zone, the chemical reaction is more precise and mass errors can be effectively avoided.

　　2. Fast and sensitive: The system has a fast response speed. This is because in the microfluidic channel, rapid mixing and mass transfer processes can be achieved, so its response time is much faster than that of large-scale reaction equipment. In addition, due to the small droplet size in the system, the detection sensitivity is high.

　　3. Cost saving, energy saving and environmental protection: Due to the use of micro devices, compared with traditional methods, the amount of reagents and energy consumption required are greatly reduced, thereby reducing costs. At the same time, because the amount of sample required is small, the impact of environmental pollution is also greatly reduced, which is in line with the concept of green chemistry and sustainable development.