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Hollow Microneedle-based Sensor for Multiplexed Transdermal Electrochemical Sensing

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Spheres Multiple Physical Network-Based Triboelectric Materials for Self-Powered Contactless Sensing.

Wanglin Zhang¹, Yanxu Lu¹, Tao Liu¹

¹School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)

|May 19, 2022

Summary

Researchers developed a new composite film for non-contact sensors. This triboelectric nanogenerator material enhances output performance and stability for reliable self-powered sensing applications.

Keywords:

contactless sensing self-powered sensing spheres multiple physical networks triboelectric materials triboelectric nanogenerators

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Last Updated: Sep 22, 2025

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Area of Science:

Materials Science
Nanotechnology
Energy Harvesting

Background:

Non-contact mode triboelectric nanogenerators offer reliable operation for self-powered sensing.
Low surface charge density in triboelectric materials limits contactless sensing applications.

Purpose of the Study:

To develop a high-performance triboelectric material for self-powered contactless sensors.
To enhance surface charge density and output performance of triboelectric materials.

Main Methods:

Fabrication of a polyvinylidene fluoride@Mxene (Ti3C2Tx) composite film using controlled Rayleigh Instability and vapor-induced phase separation during electrostatic spinning.
Characterization of the composite film's structure and electrical properties.

Main Results:

The composite film exhibits a unique spherical multi-physical network structure.
Achieved high charge output (128 µC m⁻²) and power output (200 µW cm⁻² at 2 Hz) with excellent stability.
Demonstrated high speed sensitivity (1.175 Vs m⁻¹) and accurate identification of motion states (running, jumping, walking).

Conclusions:

The developed composite film significantly improves triboelectric material performance for contactless sensing.
This work provides a foundation for high-performance triboelectric materials and self-powered contactless sensing research.