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Recent Progress in Technologies for Negatively Charging Droplets
Ziyi Wang1, Yitong Li1,2, Wenbo Yan1,2
1Hebei Engineering Laboratory of Photoelectronic Functional Crystals, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
ACS Omega
|May 4, 2026
Summary
This review explores methods for generating negatively charged droplets, addressing a research gap in droplet charging technology. Understanding these mechanisms is crucial for advancing applications in energy, biomedicine, and environmental management.
Area of Science:
- Interdisciplinary research hotspot: microfluidics, materials science, and biomedicine.
- Focus on droplet charging technology and its applications.
- Exploration of physical and chemical charging methods.
Background:
- Droplet charging technology enables applications in energy, biomedicine, and environmental management.
- Droplet charge is influenced by material properties, environment, and motion.
- A tendency for positive droplet charging is observed, particularly in liquid-solid triboelectric nanogenerators (L-S TENG).
Purpose of the Study:
- Systematically review methods for preparing negatively charged droplets.
- Address the scarcity of research on negative droplet charging mechanisms and control.
- Provide a comprehensive understanding of current research and future trends.
Main Methods:
- Review of existing literature on droplet charging.
- Analysis of physical methods (electric field, vibration, ultrasound).
- Analysis of chemical methods (surfactants, electrolytes).
Main Results:
- Observed tendency for positive droplet charging in specific applications.
- Identified a research gap in negative droplet charging mechanisms.
- Highlighted the need for efficient control strategies for negatively charged droplets.
Conclusions:
- Current research predominantly focuses on positively charged droplets.
- Developing methods for generating and controlling negatively charged droplets is essential.
- This review aims to guide future research and applications in droplet charging technology.
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