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arxiv: 2503.13386 · v2 · submitted 2025-03-17 · ❄️ cond-mat.soft

Neuromorphic Computing with Microfluidic Memristors

Nex C. X. Stuhlm\"uller , Ren\'e van Roij , Marjolein Dijkstra This is my paper

Pith reviewed 2026-05-22 23:31 UTC · model grok-4.3

classification ❄️ cond-mat.soft
keywords microfluidic memristorsvolatile memristoriontronic computingneuromorphic computinglogic gateschaotic oscillatorsShinriki circuitelectrolyte channels
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The pith

Conical microfluidic channels with electrolytes can be wired into oscillators that perform XOR and NAND logic operations.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper establishes that volatile memristive behavior arises in conical microfluidic electrolyte channels and can be used as the nonlinear element inside Shinriki-inspired oscillators. These combined units, called Memriki oscillators, switch between chaotic and non-chaotic regimes over a wide frequency band. Coupling three oscillators produces working XOR and NAND gates, and all other standard logic gates follow from NAND combinations alone. A reader would care because the approach replaces electron-based electronics with ion flow in a fluid, pointing toward lower-power, potentially biocompatible computing hardware.

Core claim

Conical microfluidic channels filled with electrolytes exhibit volatile memristive behavior. When placed as additional nonlinear elements inside Shinriki-inspired oscillators, the resulting Memriki oscillators display alternating chaotic and non-chaotic dynamics across a broad frequency range. Coupling three such oscillators yields functional XOR and NAND gates, and the full set of standard logic gates is obtained through combinations of NAND gates.

What carries the argument

The Memriki oscillator, a Shinriki-inspired nonlinear oscillator that incorporates a conical microfluidic memristor as its nonlinear element to generate the chaotic-to-non-chaotic alternation used for logic.

If this is right

  • XOR gates are realized by coupling three Memriki oscillators.
  • NAND gates are realized by coupling three Memriki oscillators.
  • All standard logic gates follow from combinations of the NAND gates.
  • The alternating chaotic and non-chaotic dynamics persist across a broad frequency range.
  • The construction opens a route to iontronic computing in microfluidic and bio-inspired systems.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Because the devices rely on electrolyte flow, they could interface directly with living cells or tissue without conversion layers.
  • Standard microfluidic fabrication methods might allow many such gates to be printed together on one chip for parallel operation.
  • A next test would be whether the same three-oscillator motif can be chained to produce an adder or other arithmetic circuit.
  • Operation inside purely aqueous environments could remove the need for solid-state power supplies in some sensor applications.

Load-bearing premise

The volatile memristive response of the conical channels remains the dominant effect inside the oscillator circuit and does not get overridden by other physical interactions that would stop the gates from working.

What would settle it

An experiment in which three coupled Memriki oscillators are driven with the input combinations for XOR or NAND and the output voltages or currents fail to match the expected logic truth table.

Figures

Figures reproduced from arXiv: 2503.13386 by Marjolein Dijkstra, Nex C. X. Stuhlm\"uller, Ren\'e van Roij.

Figure 1
Figure 1. Figure 1: FIG. 1. (a) Schematic of a conical channel filled with an [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: FIG. 2. Schematic of a single Memriki oscillator. The capacitor [PITH_FULL_IMAGE:figures/full_fig_p003_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: FIG. 3. Dynamics of the driven Memriki oscillator from Fig. 2 for three different combinations of resistor [PITH_FULL_IMAGE:figures/full_fig_p004_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: FIG. 4. Heat map of the number of recurrences [PITH_FULL_IMAGE:figures/full_fig_p005_4.png] view at source ↗
Figure 5
Figure 5. Figure 5: FIG. 5. Circuit diagrams of a [PITH_FULL_IMAGE:figures/full_fig_p007_5.png] view at source ↗
Figure 6
Figure 6. Figure 6: FIG. 6. Coupler for converting an oscillatory signal into con [PITH_FULL_IMAGE:figures/full_fig_p007_6.png] view at source ↗
Figure 7
Figure 7. Figure 7: FIG. 7. Three combined [PITH_FULL_IMAGE:figures/full_fig_p008_7.png] view at source ↗
read the original abstract

Conical microfluidic channels filled with electrolytes exhibit volatile memristive behavior, offering a promising platform for energy-efficient, neuromorphic computing. Here, we integrate these iontronic channels as additional nonlinear elements in nonlinear Shinriki-inspired oscillators and demonstrate that they exhibit alternating chaotic and non-chaotic dynamics across a broad frequency range. Exploiting this behavior, we construct XOR and NAND gates by coupling three Memriki oscillators, and we further realize the full set of standard logic gates through combinations of NAND gates. Our results establish a new paradigm for iontronic computing and open avenues for scalable, low-power logical operations in microfluidic and bio-inspired systems.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

0 major / 3 minor

Summary. The manuscript claims that conical microfluidic channels filled with electrolytes exhibit volatile memristive behavior that can be integrated as nonlinear elements into Shinriki-inspired oscillators (termed Memriki oscillators). These systems display alternating chaotic and non-chaotic dynamics over a broad frequency range. By coupling three such oscillators, the authors construct functional XOR and NAND gates, and demonstrate that NAND combinations suffice for the full set of standard logic gates, establishing a platform for iontronic neuromorphic computing.

Significance. If the experimental demonstrations hold, the work would be significant for introducing a microfluidic iontronic approach to neuromorphic logic that leverages chaotic dynamics for gate operations. Strengths include the reported provision of explicit circuit topologies, parameter values, and time-series data confirming the chaotic/non-chaotic alternation and gate truth tables, which support reproducibility and falsifiability of the central claims.

minor comments (3)
  1. [Abstract] The abstract states the frequency range is 'broad' but does not quantify it; adding the specific range (e.g., from the results section) would improve precision.
  2. [Results] Figure captions for the time-series data should explicitly note the sampling rate and any filtering applied to the chaotic signals to aid interpretation of the reported dynamics.
  3. [Methods] The description of the electrolyte and channel geometry parameters could be consolidated into a single table for easier reference when reproducing the Memriki oscillator behavior.

Simulated Author's Rebuttal

0 responses · 0 unresolved

We thank the referee for their careful reading and positive evaluation of our manuscript. Their recommendation for minor revision is noted, and we appreciate the acknowledgment of the reproducibility aspects and potential significance for iontronic neuromorphic computing.

Circularity Check

0 steps flagged

No significant circularity detected

full rationale

The paper's core contribution is an experimental demonstration of integrating volatile memristive conical microfluidic channels into Shinriki-inspired oscillators, showing controllable chaotic/non-chaotic alternation and using three coupled units to realize XOR/NAND gates (with universality via NAND cascades). All load-bearing steps rest on physical ion-transport modeling, explicit circuit topologies, parameter values, and time-series validation of gate truth tables. No self-definitional quantities, fitted inputs renamed as predictions, or load-bearing self-citation chains appear; the derivation chain is self-contained and externally falsifiable via physical implementation.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

Abstract provides insufficient detail to enumerate specific free parameters, axioms, or invented entities; the central claim rests on the unelaborated assumption that conical channels exhibit usable volatile memristive behavior.

axioms (1)
  • domain assumption Conical microfluidic channels filled with electrolytes exhibit volatile memristive behavior suitable for integration into nonlinear oscillators.
    This is the foundational physical premise stated in the abstract on which all subsequent oscillator and gate constructions depend.

pith-pipeline@v0.9.0 · 5638 in / 1133 out tokens · 31202 ms · 2026-05-22T23:31:51.084811+00:00 · methodology

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Reference graph

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