https://www.jfda-online.com/cgi/viewcontent.cgi?article=1239&context=journal

Electrowetting-on-dielectric (EWOD): Current perspectives and applications in ensuring food safety

Experimental and Theoretical Investigation of Frequency-Dependent and Conductivity-Dependent Threshold Actuation Voltage of Electrowetting-on-Dielectric and Liquid Dielectrophoresis on a One-Plate Device

Digital microfluidics (DMF) breaks up the continuous flow of analysts’ solution into discrete droplets and offers radical improvements on the manipulation of pL-sized to µL-sized droplets moving, merging, splitting, and dispensing from reservoirs. Due to its unique advantages including precise control, high throughput, less cross-contamination, simple instrumentation, flexible device geometry, and easy coupling with other technologies, its applications have been extremely promoted in the last two decades. A variety of biomedical devices have been implemented and demonstrated for healthcare ranging from biochemical synthesis to molecular diagnostics and immunoassays. In this chapter, DMF technology from the aspects of fundamentals, actuation mechanisms, and device fabrication is described. Current progress in biomedical devices of DMF for healthcare is reviewed and evaluated. Download : Download full-size image

Significance of digital microfluidic techniques in biomedical devices for healthcare

Water contamination is a significant problem in all over the world, and it is crucial to monitor the contaminating nutrients regularly for keeping the groundwater or drinking water safe. The nitrate ion has a remarkable impact on human health and the environment, and excessive use of this ion might damage the ecological system and the natural environments. Nitrate ions can be detected through various laboratory-based methods or in-situ sensor-based methods to develop a monitoring system. But for the last few years, the Interdigital sensor is used to detect the nitrate ions due to their reasonable fabrication costs and secure sensing mechanism. Some such sensors have high sensitivity with a reasonable limit of detection (LOD). Others might have a reasonable sensitivity with the reduced cost, where the proposed detection method uses a sensor-based portable sensing system. This chapter discusses the different working principles and fabrication methods of the Interdigital sensor for nitrate ions detection in water.

Yun Hui

Papers

Significance of digital microfluidic techniques in biomedical devices for healthcare

Recent Advancement of Interdigital Sensor for Nitrate Monitoring in Water