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Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
Published on: February 10, 2023
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Liquid metal coated copper micro-particles to construct core-shell structure and multiple heterojunctions for
Ye Wang1, Ya-Nan Gao1, Tian-Ning Yue1
1Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
Journal of Colloid and Interface Science
|September 9, 2021
Summary
Researchers developed novel non-magnetic microwave absorbers using liquid metal and copper composite micro-particles. These particles exhibit excellent microwave absorption (MA) performance, offering a promising solution for advanced applications.
Area of Science:
- Materials Science
- Electromagnetics
- Nanotechnology
Background:
- Traditional magnetic microwave absorbers face limitations.
- Demand for high-performance, non-magnetic microwave absorbers is increasing.
- Non-magnetic materials offer potential for wide effective absorption bandwidth.
Purpose of the Study:
- To develop a novel non-magnetic microwave absorber with enhanced performance.
- To investigate the microwave absorption properties of liquid metal and copper composite micro-particles.
- To explore the structure-property relationship for effective microwave absorption.
Main Methods:
- Preparation of liquid metal and copper (LC) composite micro-particles via coating and annealing.
- Characterization of the core-shell structure and multiple heterojunctions.
- Evaluation of microwave absorption performance, including reflection loss and effective absorption bandwidth.
Main Results:
- LC composite micro-particles demonstrated optimal reflection loss of -39.6 dB at 2.1 mm thickness.
- A maximum effective absorption bandwidth of 4.96 GHz was achieved at 2.5 mm thickness.
- Enhanced dielectric loss, including dipolar, interfacial, and dielectric polarization, contributed to high MA performance.
Conclusions:
- The developed LC composite micro-particles show excellent microwave absorption capabilities.
- The core-shell structure and multiple heterojunctions are key to enhanced dielectric loss.
- This study presents a facile method for creating metal heterojunctions for microwave absorption applications.
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