Micromixer research trend of active and passive designs

Micromixers are one of the essential components of microfluidic devices since many biological and chemical applications require homogenous mixing. In recent years, the investigation of micromixers in terms of fabrication methods, materials, types, and designs has gained considerable interest in providing researchers with high-performance micromixers for the desired applications. This notable progress has sparked widespread enthusiasm for publishing research and review articles related to micromixers, leading researchers to encounter a wide variety of articles with different aims, scopes, and qualities. Thus, to show the trend of micromixer research, a comprehensive reference is indispensable to cover these articles, thereby classifying and organizing the information. To address this issue, the present study has offered a comprehensive analysis of papers published in the micromixers field. Also, we have evaluated the trend of the research studies performed and published papers and discussed future directions and challenges about micromixers.