# Nanogenerators in Biomedical Frontiers: Revolutionizing Self-Powered Healthcare Systems

## TL;DR

This paper reviews how self-powered nanogenerators can revolutionize healthcare by enabling devices that harvest energy from the body or environment, eliminating the need for batteries.

## Contribution

The paper provides a comprehensive review of nanogenerator mechanisms and their integration into diverse biomedical applications, highlighting both opportunities and challenges.

## Key findings

- Nanogenerators can harvest biomechanical energy for continuous operation of biomedical devices.
- Applications include drug delivery patches, electronic skin, and tissue repair scaffolds.
- Challenges include improving energy efficiency and ensuring long-term biocompatibility.

## Abstract

Self-powered systems have emerged as transformative technologies
that address the growing demand for sustainable, autonomous, and miniaturized
energy solutions for next-generation biomedical devices. Unlike conventional
sensors and therapeutic platforms that rely on external power sources
or batteries, self-powered nanogeneratorsbased on piezoelectric,
triboelectric, and hybrid nanogeneratorscan harvest biomechanical
or environmental energy to enable continuous operation. This review
highlights the basics of nanogenerator mechanisms and material innovations,
extending to their strategic integration into advanced biomedical
applications. Particular emphasis is placed on applications such as
regenerative hair growth techniques using electrical stimulation,
motion-triggered drug release patches that ensure precise and sustained
delivery, biocompatible electronic skin (E-skin) for real-time physiological
sensing, wearable devices for continuous health monitoring, sweat-resistant
wearables, hearing aids, ligament strain and bladder sensors, respiration-driven
monitors, smart eye sensors, and scaffolds for cardiovascular and
bone tissue repair through bioelectric cues. By evaluating both the
opportunities and challenges, including energy conversion efficiency,
long-term biocompatibility, device stability, and large-scale fabrication,
this review provides a balanced outlook on the future of self-powered
biomedical systems. The insights presented herein not only underscore
their clinical and technological relevance but also identify key research
directions required to bridge the gap between laboratory prototypes
and practical healthcare applications.