Cited by 167Advanced Memory and Neural ComputingMolecular Junctions and NanostructuresNeuroscience and Neural Engineering

Multi-level memory-switching properties of a single brain microtubule

Sahu, Satyajit, Ghosh, Subrata, Hirata, Kazuto, Fujita, Daisuke, Bandyopadhyay, Anirban·2013·Applied Physics Letters

Abstract

We demonstrate that a single brain-neuron-extracted microtubule is a memory-switching element, whose hysteresis loss is nearly zero. Our study shows how a memory-state forms in the nanowire and how its protein arrangement symmetry is related to the conducting-state written in the device, thus, enabling it to store and process ∼500 distinct bits, with 2 pA resolution between 1 nA and 1 pA. Its random access memory is an analogue of flash memory switch used in a computer chip. Using scanning tunneling microscope imaging, we demonstrate how single proteins behave inside the nanowire when this 3.5 billion years old nanowire processes memory-bits.

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Crossref · 10.1063/1.4793995

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17 of 17 references verified0 citation errors · 0 not checkable

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  • The group of Anirban Bandyopadhyay has discovered conductive resonances in single microtubules that are observed when there is an applied alternating current at specific frequencies in gigahertz, megahertz and kilohertz ranges.

    “The group of Anirban Bandyopadhyay at National Institute for Material Sciences in Tsukuba, Japan, has indeed discovered conductive resonances in single microtubules that are observed when there is an applied alternating current at specific frequencies in gigahertz, megahertz and kilohertz ranges [88,89].”

    From Consciousness in the universe (2014) · cites this paper as [89]

  • Quantum effects occur in microtubules at biological temperatures.

    “The group has made a series of remarkable discoveries suggesting that quantum effects do occur in microtubules at biological temperatures.”

    From Consciousness in the universe (2014) · cites this paper as [89]

  • Quantum conductance through photosynthesis protein is enhanced by mechanical vibration, and microtubules appear to have their own mechanical vibrations in megahertz.

    “Quantum conductance through photosynthesis protein is enhanced by mechanical vibration [126], and microtubules appear to have their own set of mechanical vibrations (e.g. in megahertz as suggested by Sahu et al. [88,89]).”

    From Consciousness in the universe (2014) · cites this paper as [89]

  • Electronic conductance along microtubules, normally extremely good insulators, becomes exceedingly high, approaching quantum conductance, at certain specific resonance frequencies of applied AC stimulation.

    “First, they found that electronic conductance along microtubules, normally extremely good insulators, becomes exceedingly high, approaching quantum conductance, at certain specific resonance frequencies of applied alternating current (AC) stimulation.”

    From Consciousness in the universe (2014) · cites this paper as [89]

  • Bandyopadhyay's recent results show electrical resistance drops dramatically at specific frequencies, largely temperature- and length-independent.

    “electrical resistance drops dramatically, at certain very specific frequencies, in a largely-temperature independent and length-independent way.”

    From Consciousness in the universe (2014) · cites this paper as [89]

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Authors
Sahu, S., Ghosh, S., Hirata, K., Fujita, D., & Bandyopadhyay, A.
Affiliations
  • Advanced Nano Characterization Center 1 , 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
  • National Institute for Materials Science (JP)
Venue
Applied Physics Letters
Published
2013-03-25
Volume
102
Issue
12
ISSN
  • 0003-6951 (ISSN-L)
  • 1077-3118
OpenAlex
W2092301760
Cited by
167
References
18
Citations by year
2026: 10 · 2025: 7 · 2024: 9 · 2023: 10 · 2022: 16 · 2021: 9 · 2020: 9 · 2019: 7 · 2018: 9 · 2017: 16 · 2016: 24 · 2015: 20 · 2014: 12 · 2013: 8
FWCI
12.80
Type
journal article
Language
en
Open access
closed
Locations
Applied Physics Letters (publishedVersion)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Memory and Neural Computing
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Molecular Junctions and Nanostructures
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
Keywords
microtubules, memory switching, single-molecule electronics, nanowires, hysteresis, random access memory, flash memory, brain neurons

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