Non-faradaic junction sensing

doi:10.1038/s41578-024-00755-1

Non-faradaic junction sensing

2024-12-09

0

PRE

AI

DOI：10.1038/s41578-024-00755-1

Original

Original request for help

Save

Abstract

En 中文

A non-faradaic junction (NFJ) is a connection between an ionic conductor and an electronic conductor in which no electrochemical reaction takes place. The junction behaves like a capacitor and couples the ionic and electronic currents through chemistry, electricity and entropy. Its charge-voltage curve is sensitive to various environmental signals, allowing it to function as a sensor; because no reaction occurs, the sensing is non-destructive and long-lasting. NFJ sensors have high sensitivity, rapid response and small size, and they can be self-powered. These sensors are familiarly used in electrophysiology of the heart, brain and muscles, and applications are emerging in wearable and implantable devices and soft robotics, as well as in sensing pressure, sound, temperature and chemicals. In this Review, we discuss NFJ sensors, emphasizing the development of devices and materials for each side of the junction. The flexibility in choosing materials enables NFJ sensors to fulfil challenging requirements, such as softness, stretchability, transparency and degradability.

Keywords:

ELECTRICAL DOUBLE-LAYER

ADDRESSABLE POTENTIOMETRIC SENSOR

IONTRONIC PRESSURE SENSOR

POLYMER NETWORKS

TRANSPARENT

HYDROGELS

FATIGUE

DESIGN

CONDUCTORS

FILMS

Non-faradaic junction sensing

Abstract

Journal

Organization