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Implantable and Stretchable Magnetoelectric Sensor for Motion-Assisted Wireless Signaling Using Biocompatible
Yuan Yang1,2, Qiming Wang1,2, Zhao Wang3
1School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610064, China.
ACS Applied Materials & Interfaces
|March 2, 2026
Summary
This study introduces a new implantable and stretchable magnetoelectric sensor (ISMS) for secure personal identification. The ISMS offers enhanced safety by combining identification with activity monitoring, overcoming current security risks.
Area of Science:
- Biomedical Engineering
- Materials Science
- Sensor Technology
Background:
- Current personal identification methods (passwords, biometrics) face counterfeit risks.
- Implantable wireless communication offers improved security but faces challenges in sensor stretchability, biocompatibility, and power consumption.
Purpose of the Study:
- To develop an implantable and stretchable magnetoelectric sensor (ISMS) for secure personal identification and activity monitoring.
- To address the limitations of current identification methods and challenges in implantable sensor technology.
Main Methods:
- Synthesized a biocompatible piezo-elastomer (BPEA) with high piezoelectricity and stretchability.
- Developed BPEA/cobalt ferrite (CoFe2O4) composites for the ISMS.
- Evaluated the sensor's response to electromagnetic waves for identification and piezoelectric response for activity monitoring.
Main Results:
- The ISMS demonstrated high responses to electromagnetic waves (54.56 dB at 2.4 GHz, 44.88 dB at 5 GHz) for personal identification.
- The sensor's piezoelectric function enabled activity monitoring, enhancing identification safety.
- Achieved over 200% cyclic elongation and confirmed high biocompatibility for in vivo use.
Conclusions:
- The developed ISMS offers a promising solution for secure personal identification and activity monitoring.
- The sensor's stretchability and biocompatibility meet the requirements for long-term in vivo applications.
- This technology advances implantable sensor capabilities for enhanced personal security.
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