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Related Experiment Video

Updated: May 15, 2026

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver
08:25

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Published on: August 27, 2021

A self-powered microsystem with efficient power management for continuous wireless sensing.

Xiangyu Zhao1, Zerui Xu1, Ziyang Ou1

  • 1School of Integrated Circuits, Tsinghua University, Beijing, China.

Microsystems & Nanoengineering
|May 13, 2026
PubMed
Summary
This summary is machine-generated.

This study presents a self-powered microsystem using triboelectric nanogenerators (TENGs) to harvest mechanical energy for wireless IoT devices. The optimized system enables continuous sensing and communication, paving the way for battery-less applications.

Related Experiment Videos

Last Updated: May 15, 2026

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver
08:25

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Published on: August 27, 2021

Area of Science:

  • Energy Harvesting
  • Microsystems Engineering
  • Internet of Things (IoT)

Background:

  • The Internet of Things (IoT) requires self-powered wireless microsystems.
  • Energy harvesters, particularly triboelectric nanogenerators (TENGs), are crucial for powering distributed IoT nodes.
  • A key challenge is converting TENGs' high-voltage, low-current pulsed output into a stable, low-voltage supply for microsystems.

Purpose of the Study:

  • To introduce a self-powered microsystem capable of continuous sensing and wireless communication.
  • To exclusively power the microsystem using a TENG harvesting low-frequency mechanical energy.
  • To address the impedance mismatch between TENGs and microsystem electronics for enhanced energy harvesting.

Main Methods:

  • System-level integration and optimization of a TENG-powered microsystem.
  • Harvesting low-frequency mechanical energy (5 Hz).
  • Implementing high-efficiency power management for low-voltage supply.

Main Results:

  • Achieved a five-fold increase in harvested energy compared to conventional full-bridge rectification.
  • Demonstrated cold-start capability from 0 V to 4.2 V in 525 s.
  • Provided approximately 110 μW of power under 5 Hz mechanical excitation.
  • Successfully demonstrated a self-powered wireless gas monitoring system.

Conclusions:

  • The developed microsystem enables continuous sensing and wireless communication powered solely by a TENG.
  • System optimization significantly improves energy harvesting efficiency.
  • This work establishes a viable pathway toward battery-less IoT nodes for long-term, maintenance-free applications.