Biomolecule nanoparticle-induced nanocomposites with resistive switching nonvolatile memory properties

Yongmin Ko, Sook Won Ryu, Jinhan Cho

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Resistive switching behavior-based memory devices are considered promising candidates for next-generation data storage because of their simple structure configuration, low power consumption, and rapid operating speed. Here, the resistive switching nonvolatile memory properties of Fe2O3 nanocomposite (NC) films prepared from the thermal calcination of layer-by-layer (LbL) assembled ferritin multilayers were successfully investigated. For this study, negatively charged ferritin nanoparticles were alternately deposited onto the Pt-coated Si substrate with positively charged poly(allylamine hydrochloride) (PAH) by solution-based electrostatic LbL assembly, and the formed multilayers were thermally calcinated to obtain a homogeneous transition metal oxide NC film through the elimination of organic components, including the protein shell of ferritin. The formed memory device exhibits a stable ON/OFF current ratio of approximately 103, with nanosecond switching times under an applied external bias. In addition, these reversible switching properties were kept stable during the repeated cycling tests of above 200 cycles and a test period of approximately 105 s under atmosphere. These solution-based approaches can provide a basis for large-area inorganic nanoparticle-based electric devices through the design of bio-nanomaterials at the molecular level.

Original languageEnglish
Pages (from-to)36-43
Number of pages8
JournalApplied Surface Science
Volume368
DOIs
Publication statusPublished - 2016 Apr 15

Keywords

  • Electrostatic layer-by-layer assembly
  • FeO nanocomposite
  • Multilayers
  • Nonvolatile memory
  • Thermal calcination

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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