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Related Concept Videos

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Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
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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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Bridging the Bio-Electronic Interface with Biofabrication
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G-Quadruplex Network Engineering in Ionogels: Realizing Robust Biosensing Interfaces for Plant Electrophysiology.

Yuanteng Su1, Jiaheng Xu2, Mengru Guo1

  • 1College of Chemistry and Material Science, Shandong Agricultural University, Tai'an 271018, P. R. China.

ACS Nano
|July 3, 2026
PubMed
Summary

Researchers developed a new ionogel electrode for stable plant monitoring. This advanced biosensor ensures high-fidelity electrophysiological signal capture, improving plant-machine interfaces for real-time physiological condition assessment.

Keywords:
G-quadruplexbioadhesive interfacecomplex surfacesionogelplant electrophysiology

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Area of Science:

  • Plant electrophysiology
  • Biosensing technology
  • Materials science

Background:

  • Establishing a reliable plant-machine interface for monitoring plant physiological conditions via electrophysiology is challenging.
  • Noninvasive electrodes require stable, conformal biosensing interfaces with plant surfaces.

Purpose of the Study:

  • To investigate the key factors influencing the conformability of gel electrodes for plant biosensing.
  • To develop an advanced ionogel electrode for high-fidelity plant electrophysiological signal acquisition.

Main Methods:

  • Designed an ionogel by incorporating G-quadruplexes into a chemically cross-linked network.
  • Characterized the ionogel's elastic modulus and toughness.
  • Evaluated the ionogel electrode's performance in capturing plant electrophysiological signals, assessing contact impedance and signal-to-noise ratio.

Main Results:

  • The ionogel exhibited a significantly reduced Young's modulus and enhanced toughness.
  • Achieved robust conformal adhesion on complex plant surfaces, including hairy interfaces.
  • Demonstrated high-fidelity signal capture with low contact impedance and high signal-to-noise ratio.
  • Ensured signal authenticity and interface stability under disturbances.

Conclusions:

  • Elastic modulus is critical for gel electrode conformability on plants.
  • The developed ionogel electrode enables stable, noninvasive recording of plant electrical signaling.
  • This advancement improves plant-machine interfaces for real-time monitoring and intervention.