Design and Simulation of Single‐Electrode Mode Triboelectric Nanogenerator‐Based Pulse Sensor for Healthcare Applications Using COMSOL Multiphysics

Abstract

The advancement in triboelectric nanogenerator technology leads to numerous advantages in various fields, especially in biomedical and healthcare applications. Theoretical modeling and simulation of sensors is the initial step for an optimized cost‐effective real‐time sensor fabrication which reduces the wastage of materials and rapid prototyping, giving an expected sensor performance. Herein, a theoretical model of single‐electrode triboelectric nanogenerator is presented which finds its application in healthcare monitoring as a wearable flexible pulse sensor to measure the wrist pulse for disease diagnosis. The device optimization in terms of structure, material and output performance is done based on the said application. A brief study of the operating principle of the sensor along with the factors affecting the output is discussed in this work. The design is conceptually investigated considering the electrostatic shield effect from the contact electrode. The output performance variation concerning the plain and micro‐structured triboelectric surface is also determined in terms of open‐circuit voltage of ≈16.95 and ≈21.63 V, respectively, and also a short‐circuit charge of ≈181.81 and ≈196.57 pC, respectively. The superior output performance even for smaller wrist pulse displacement range can serve as a significant assistance for the rational plan of the device structure.

Effective Modeling and Numerical Simulation of Triboelectric Nanogenerator for Blood Pressure Measurement Based on Wrist Pulse Signal Using Comsol Multiphysics Software

“…It ensures that the circular geometry is an optimum shape for designing the TENG for harvesting the wrist pulse pressure. 13 Moreover the graph distinguish the applied pulse pressure versus displacement of circular and rectangular shape sensors as shown in Figure 6 C. It is clear that the circular-shaped sensor produces more displacement for the applied 500–3000 Pa of pulse pressure instead of the rectangular-shaped sensor.…”

“…It is evident that the circular geometry handles the applied pulse pressure in a helpful form and converts it into an equivalent displacement. It ensures that the circular geometry is an optimum shape for designing the TENG for harvesting the wrist pulse pressure . Moreover the graph distinguish the applied pulse pressure versus displacement of circular and rectangular shape sensors as shown in Figure C.…”

“…The top positive layer is designed with the dimension of 1 μm diameter and 0.2 μm thickness, the same act as the terminal also. The two opposite dielectric polarity layers are separated with a 0.915 mm interval. − …”

“…Through the simulation can find the optimized materials, shape, and surface morphology for improving the output voltage of the modeled TENGs. The various healthcare devices worked based on the TENG principle are listed below …”

Recent Progress of Nanogenerators for Green Energy Harvesting: Performance, Applications, and Challenges

“…The benefits of triboelectric nanogenerators are their small weight, low cost, simple operation principle, and lack of sophisticated production [ 61 , 62 , 63 , 64 ]. To attain the highest performance, the triboelectric materials and electro-mechanical designs of the nanogenerators must be optimized [ 65 , 66 , 67 , 68 , 69 , 70 , 71 ]. As a result, optimizing the design of triboelectric nanogenerators is critical for improving the conversion of green energy into electric energy.…”