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Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...
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Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...

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Engineered cellulosic triboelectric materials for multi-modal sensing via β-phase programming.

Ling-Zhi Huang1, Yan Ding2, Dan-Dan Li2

  • 1Liaoning Key Lab of Lignocellulose Chemistry and Biomaterialsbo, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, Liaoning 116034, China; Research Center of Biomass Clean Utilization, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, PR China.

International Journal of Biological Macromolecules
|February 19, 2025
PubMed
Summary

Researchers developed advanced cellulosic triboelectric materials for energy harvesting. These materials enhance triboelectric nanogenerators (TENGs) for sensitive, self-powered sensors, enabling wearable electronics and smart device applications.

Keywords:
ElectrospinningNon-contact triboelectric nanogeneratorTriboelectric materials

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Energy Harvesting

Background:

  • Cellulosic materials are attractive for triboelectric nanogenerators (TENGs) due to their sustainability.
  • Existing cellulose-based TENGs suffer from low surface charge density, limiting performance.
  • There is a need for improved cellulosic materials to enhance TENG sensitivity and power output.

Purpose of the Study:

  • To functionalize cellulosic triboelectric materials for enhanced performance in self-powered sensors.
  • To investigate the effect of electrospun polyvinylidene fluoride (PVDF) nanofibers within porous air-laid paper (AP) on material properties.
  • To develop high-sensitivity, self-powered sensors for various applications.

Main Methods:

  • Utilized electrostatic spinning to create functionalized cellulosic triboelectric layers.
  • Incorporated electrospun PVDF nanofibers into porous air-laid paper (AP) to form composite materials.
  • Fabricated and tested triboelectric nanogenerators (TENGs) and self-powered sensors based on the developed materials.

Main Results:

  • The PVDF/12 wt%@AP composite exhibited a significant charge output (60.7 μC m⁻²) and power output (233.28 mW m⁻²).
  • The developed contact self-sensor demonstrated high sensitivity (6.20 V kPa⁻¹) within a specific pressure range (1.23–5.0 kPa).
  • Non-contact sensors successfully recognized objects and detected human movements, with potential for wireless sensor terminals.

Conclusions:

  • Functionalized β-phase cellulosic materials offer a promising pathway for high-performance, self-powered sensors.
  • The developed materials advance the development of durable, wearable self-powered sensor systems.
  • These materials can effectively capture mechanical energy from the environment for practical applications.