Ionic Liquid-Triggered Redox Molecule Placement in Block Copolymer Nanotemplates toward an Organic Resistive Memory

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    The integration of functional components such as metal nanoparticles, metal salts, or ionic liquids with well-defined block copolymer (BCP) nanotemplates via noncovalent bond interactions has afforded hybrid functional materials. Here, we designed an ionic liquid (IL)-functionalized redox-active TEMPO (2,2,6,6-tetramethylpiperidine-N-oxy) radical (guest), investigated phase-selective incorporation/placement into host BCP nanostructured matrices, and established a rational approach to functionalize BCP templates. On-demand domain functionalization of poly(styrene-b-ethylene oxide) (PS-b-PEO) was triggered by ion-ionophore interaction, as verified by the suppression of PEO melting transition in DSC, and the swelling behavior of the PEO spherical domain in AFM, TEM, and X-ray scattering characterizations. The obtained BCP layer containing the redox-active TEMPO and IL was utilized as an active layer in the diode-structured memory device, which exhibited on/off resistive switching (on/off ratio >10<sup>3</sup>). Systematic placement of TEMPO and IL in the BCP spherical domain allowed for tuning of the switching characteristics and revealed that the formation of a discontinuous redox-active domain was critical for rewritable resistive switching.

    Original languageEnglish
    Pages (from-to)892-896
    Number of pages5
    JournalACS Macro Letters
    Volume4
    Issue number9
    DOIs
    Publication statusPublished - 2015 Sep 15

    Fingerprint

    Ionic Liquids
    Ionic liquids
    Block copolymers
    Data storage equipment
    Polyethylene oxides
    Molecules
    Ionophores
    Ethylene Oxide
    Styrene
    Functional materials
    Metal nanoparticles
    Hybrid materials
    X ray scattering
    Swelling
    Ethylene
    Diodes
    Melting
    Tuning
    Salts
    Metals

    ASJC Scopus subject areas

    • Organic Chemistry
    • Materials Chemistry
    • Polymers and Plastics
    • Inorganic Chemistry

    Cite this

    Ionic Liquid-Triggered Redox Molecule Placement in Block Copolymer Nanotemplates toward an Organic Resistive Memory. / Suga, Takeo; Aoki, Kohei; Nishide, Hiroyuki.

    In: ACS Macro Letters, Vol. 4, No. 9, 15.09.2015, p. 892-896.

    Research output: Contribution to journalArticle

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