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Updated: Aug 20, 2025

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

Molecular magneto-ionic proton sensor in solid-state proton battery.

Yong Hu¹, Zipeng Guo², Yingjie Chen³

¹Department of Mechanical and Aerospace Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA.

Nature Communications

|November 17, 2022

Summary

This summary is machine-generated.

Researchers developed a novel proton-based magneto-ionic system using a molecule-based magnet. This system enables on-demand control of magnetic properties and acts as a sensitive radiofrequency proton sensor.

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Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing

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Published on: March 7, 2018

Area of Science:

Materials Science
Magnetism
Proton Conductivity

Background:

Proton conductivity offers potential for magneto-ionic control of magnetic materials via the Grotthuss mechanism.
Challenges include the scarcity of proton-responsive magnets and effective solid-state sensing methods.

Purpose of the Study:

To demonstrate proton-based magneto-ionics in a molecule-based magnet.
To utilize the magnet as a solid-state proton battery electrode and radiofrequency (RF) sensing medium.
To enable on-demand proton stimulus for magneto-ionic control.

Main Methods:

Fabrication of a molecule-based magnet with a 3D hydrogen-bonding network for high proton conductivity.
Utilized a 3D printed vascular hydrogel for controlled proton delivery.
Employed Raman spectroscopy to analyze redox behavior and magnetism control.
Characterized RF proton sensor sensitivity across a wide concentration range.

Main Results:

Achieved high proton conductivity (1.6 × 10^-3 S cm^-1) due to the 3D hydrogen-bonding network.
Demonstrated on-demand magneto-ionic effects triggered by proton stimulus.
Confirmed redox behavior responsible for magnetism modulation via Raman spectroscopy.
Developed a highly sensitive RF proton sensor (10^-6 to 1 M) operating at 1 GHz and 405 Oe.

Conclusions:

The molecule-based magnet successfully enables proton-based magneto-ionics.
The system functions as both a proton battery electrode and an RF sensing medium.
Highlights the potential for advanced sensing applications using proton-based magneto-ionics.