Login / Signup

Micro-Droplets Parameters Monitoring in a Microfluidic Chip via Liquid-Solid Triboelectric Nanogenerator.

Wenkai LiuHengyu LiQi GaoDa ZhaoYang YuQin XiangXiaojun ChengZhong Lin WangWei LongTinghai Cheng
Published in: Advanced materials (Deerfield Beach, Fla.) (2023)
The monitoring of micro-droplets parameters is significant to the development of droplet microfluidics. However, existing monitoring methods have drawbacks such as high cost, interference with droplet movement, and even the potential for cross-contamination. Herein, a micro-droplets monitoring method (MDMM) based on liquid-solid triboelectric nanogenerator (LS-TENG) is proposed, which can realize non-invasive and self-powered monitoring of micro-droplets in a microfluidic chip. The droplet frequency is monitored by voltage pulse frequency and a mathematical model is established to monitor the droplet length and velocity. Furthermore, we construct a micro-droplets sensor (MDS) based on the MDMM to carry out the experiment. The coefficients of determination (R 2 ) of the fitting curves of the micro-droplets frequency, length, and velocity monitoring are 0.998, 0.997, and 0.995, respectively. To prove the universal applicability of the MDMM, the micro-droplets generated by different liquid media and channel structures are monitored. Eventually, a micro-droplets monitoring system is built, which can realize the counting of micro-droplets and the monitoring of droplet frequency and length. This work provides a novel approach for monitoring micro-droplets parameters, which holds the potential to advance developments in the field of microfluidics. This article is protected by copyright. All rights reserved.
Keyphrases
  • high throughput
  • single cell
  • circulating tumor cells
  • blood pressure
  • high resolution
  • human health
  • drinking water
  • solid phase extraction