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Updated: May 12, 2026

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Chemically Selective Nanoelectrode Arrays for Real-Time, Parallel Neurotransmitter and Electrical Recording.

Shivani Shukla1,2,3, An-Yi Chang1, Anum Tahir1,4

  • 1Aiiso Yufeng Li Family Department of Chemical and Nano Engineering University of California San Diego La Jolla California USA.

Small Science
|May 11, 2026
PubMed
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This summary is machine-generated.

Researchers developed novel Graph-nanoelectrode arrays (NEAs) to simultaneously measure electrical activity and neurotransmitter release in neurons. This breakthrough enables real-time, subcellular insights into neural processing and network dynamics.

Area of Science:

  • Neuroscience
  • Biotechnology
  • Materials Science

Background:

  • Simultaneous real-time measurement of neuronal electrical activity and neurotransmitter release at the subcellular level is challenging.
  • Bridging this gap is crucial for understanding single-cell processing, network dynamics, and developing closed-loop neural interfaces.

Purpose of the Study:

  • To introduce Graph-nanoelectrode arrays (NEAs) that integrate intracellular-like electrophysiology with electrochemical neurotransmitter sensing.
  • To demonstrate the capability of Graph-NEAs for simultaneous recording of electrical activity and dopamine release in live neuronal networks.

Main Methods:

  • Development of graphite-modified nano-electrode arrays (Graph-NEAs).
  • Co-registration of supra- and sub-threshold electrical activity with dopamine release currents at sub-neuronal sites.

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  • Validation of electrochemical readouts against calcium imaging and electrical signals.
  • Assessment of dopamine dynamics under various stimulation and inhibition conditions (electrical stimulation, KCl, reserpine).
  • Replication of Parkinson's-relevant oxidative stress models (glutathione depletion, iron exposure).
  • Optical synaptic vesicle assays to confirm neurotransmitter release origin.

    • Main Results:

    • Graph-NEAs successfully recorded both electrical activity and dopamine release with high sensitivity, selectivity, and stability.
    • Dopamine dynamics were shown to closely track sub-threshold electrical activity.
    • The platform allowed for the recapitulation of Parkinson's-relevant conditions.
    • Optical assays confirmed neurotransmitter release from the cell-nanoelectrode interface.

    Conclusions:

    • Graph-NEAs offer a novel multimodal neural recording platform by unifying chemical and electrical sensing at the nanoscale.
    • This technology represents a new paradigm for neural recording with broad applications.
    • Potential applications include closed-loop neuromodulation, disease modeling, drug discovery, and neuromorphic engineering.