Volume 9, Issue 4 2401831
Research Article

Enabling Charge Trapping with Quasi-Magnetization through Transition Metal Ion-Chelated Mesoporous Silica Particles for Wearable Antibacterial Self-Powering Sensors

Seunghye Han

Seunghye Han

Department of Polymer Science & Engineering, Chonnam National University, Gwangju, 61186 Republic of Korea

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Jungchul Park

Jungchul Park

Korea Institute of Ceramic Engineering and Technology (KICET), Chungbuk, 28160 Republic of Korea

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Jingzhe Sun

Jingzhe Sun

Human-Tech Convergence Program, Department of Clothing & Textiles, Hanyang University, Seoul, 04763 Republic of Korea

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Bingqi Ren

Bingqi Ren

Department of Polymer Science & Engineering, Chonnam National University, Gwangju, 61186 Republic of Korea

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Jiwoo Lee

Jiwoo Lee

Department of Polymer Science & Engineering, Chonnam National University, Gwangju, 61186 Republic of Korea

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Jihyun Bae

Jihyun Bae

Human-Tech Convergence Program, Department of Clothing & Textiles, Hanyang University, Seoul, 04763 Republic of Korea

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Jeong Ho Chang

Corresponding Author

Jeong Ho Chang

Korea Institute of Ceramic Engineering and Technology (KICET), Chungbuk, 28160 Republic of Korea

E-mail: [email protected]; [email protected]

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Jong-Jin Park

Corresponding Author

Jong-Jin Park

Department of Polymer Science & Engineering, Chonnam National University, Gwangju, 61186 Republic of Korea

E-mail: [email protected]; [email protected]

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First published: 13 February 2025

Abstract

Wearable self-powering sensors based on triboelectric nanogenerators (TENGs) emerging as a promising strategy for a wide range of applications, such as self-powering and energy-harvesting systems, are widely used in healthcare and displacement current are utilized as the driving force. Although the TENG theory is rooted in the displacement current equation proposed by Maxwell, the magnetic field created by this current is often overlooked in TENG research. In this work, an effective charge-trapping method based on the magnetization current induced by transition metal ion chelation is reported. The experimental results, along with a theoretical analysis of the Maxwell equation and a discussion of the charge-trapping mechanism, demonstrate that magnetic materials provide enhanced charge-trapping performance. Transition metal ions chelated to mesoporous silica particles (MSPs) can slightly assign weak paramagnetic properties owing to the formation of ligand complexes. As a result, they can generate a feeble quasi-magnetization current during the TENG cycle, which enhances the surface charge density of the Co-MSPs-based polyvinyl alcohol TENG (PVA-TENG) by 68%. In addition, it is confirmed that the MSPs chelated with transition metal ions exhibit antibacterial properties, thereby providing promising synergistic effects from the perspective of application as a wearable TENG-based antibacterial sensor system.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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