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Electroactive Proteinoid-Quantum Dot Systems.

Panagiotis Mougkogiannis1, Andrew Adamatzky1

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Summary
This summary is machine-generated.

New proteinoid-quantum dot (QD) networks were synthesized, forming toroidal nanostructures. These hybrid materials exhibit reproducible electrochemical oscillations and enhanced signal amplitude, paving the way for adaptive biosensors and neuromorphic computing applications.

Keywords:
proteinoidsquantum dotsself‐assemblysynaptic plasticity

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Area of Science:

  • Materials Science
  • Biotechnology
  • Nanotechnology

Background:

  • Proteinoid-quantum dot (QD) conjugates represent a novel class of bioquantum hybrid materials.
  • These materials synergistically combine biological self-assembly properties with the electronic characteristics of semiconductor nanocrystals.

Purpose of the Study:

  • To synthesize and analyze Glu-Phe-Asp-Cys proteinoid-QD networks.
  • To investigate the morphological, electrochemical, and signal transduction properties of these hybrid materials.
  • To explore their potential applications in neuromorphic computing and adaptive biosensing.

Main Methods:

  • Synthesis of proteinoid-QD networks using sulfosuccinimidyl 4-(N-maleimidomethyl)cyclohexane-1-carboxylate (sulfo-SMCC) cross-linking chemistry.
  • Morphological characterization using scanning electron microscopy (SEM).
  • Electrochemical analysis to study oscillations, signal enhancement, charge transfer resistance, and electron transfer kinetics.
  • Evaluation of response to structured binary input and frequency synchronization.

Main Results:

  • Achieved 80-90% conjugation efficiency in proteinoid-QD networks.
  • Observed a morphological transformation into toroidal nanostructures (outer diameter ~145 nm, central cavity ~102 nm).
  • Demonstrated spontaneous and reproducible electrochemical oscillations (0.03–0.11 Hz, 297–485 mV).
  • QD incorporation resulted in a 41-fold enhancement in signal amplitude (1999 mV vs. 48.8 mV) via surface plasmon coupling.
  • Optimal charge transfer resistance for biosensing was determined to be approximately 5250 Ω.
  • Electron transfer kinetics followed first-order decay (α = 0.0032 Hz⁻¹).
  • Networks exhibited frequency synchronization (f = 0.022217 Hz) and adaptive response-like behavior.

Conclusions:

  • Proteinoid-QD conjugates can be effectively synthesized into toroidal nanostructures with unique electrochemical properties.
  • The hybrid materials show significant signal enhancement and reproducible oscillatory behavior, suitable for biosensing.
  • The observed adaptive responses suggest potential for advanced information processing and neuromorphic computing architectures.