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Resistive random access memory utilizing ferritin protein with Pt nanoparticles.

Mutsunori Uenuma1, Kentaro Kawano, Bin Zheng

  • 1Nara Institute of Science and Technology, 8916-5, Takayama, Ikoma, Nara 630-0192, Japan. uenuma@ms.naist.jp

Nanotechnology
|April 1, 2011
PubMed
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Controlled conductive paths in resistive random access memory (ReRAM) were achieved using platinum nanoparticles (Pt NPs) in NiO film. This method enables stable, low-power memory operations, even with a single nanoparticle.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrical Engineering

Background:

  • Resistive random access memory (ReRAM) offers promising non-volatile memory solutions.
  • Controlling conductive filament formation is crucial for stable ReRAM performance.
  • Nanoparticle integration presents a novel approach for precise device engineering.

Purpose of the Study:

  • To investigate the formation of controlled single conductive paths in NiO-based ReRAM.
  • To explore the role of embedded platinum nanoparticles (Pt NPs) in enabling stable ReRAM switching.
  • To analyze the impact of Pt NP density on ReRAM device characteristics.

Main Methods:

  • Fabrication of NiO films embedded with homogeneous platinum nanoparticles (Pt NPs) using ferritin protein.

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  • Characterization of Pt NP distribution and its influence on electric field convergence.
  • Electrical testing of ReRAM devices to evaluate switching behavior, ON/OFF resistance, forming voltage, and endurance.

    • Main Results:

    • Successfully formed controlled single conductive paths by embedding Pt NPs in NiO film.
    • Demonstrated stable switching behavior in ReRAM devices incorporating Pt NPs.
    • Observed that decreasing Pt NP density increased OFF state resistance and decreased forming voltage, while ON resistance remained unaffected.
    • Showcased that a single Pt NP is sufficient for low-power and stable memory operation.

    Conclusions:

    • Ferritin-directed homogeneous Pt NP placement facilitates electric field convergence for controlled conductive path formation in ReRAM.
    • Pt NP density critically influences ReRAM performance metrics like OFF resistance and forming voltage.
    • The integration of a single Pt NP can lead to highly stable and energy-efficient ReRAM devices.