Storage of Electrical Information in Metal-Organic-Framework Memristors

Single crystals of a cyclodextrin‐based metal–organic framework (MOF) infused with an ionic electrolyte and flanked by silver electrodes act as memristors. They can be electrically switched between low and high conductivity states that persist even in the absence of an applied voltage. In this way,...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2014-04, Vol.53 (17), p.4437-4441
Main Authors: Yoon, Seok Min, Warren, Scott C., Grzybowski, Bartosz A.
Format: Article
Language:English
Subjects:
catalysis (homogeneous), solar (photovoltaic), bio-inspired, charge transport, mesostructured materials, materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly)
Channels
Electric potential
Electrodes
Electrolytes
Memory devices
memristors
Metal-organic frameworks
Nanostructure
negative differential resistance
non-volatile memory
resistive random access memory
Resistivity
Resistors
Silver
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Summary:Single crystals of a cyclodextrin‐based metal–organic framework (MOF) infused with an ionic electrolyte and flanked by silver electrodes act as memristors. They can be electrically switched between low and high conductivity states that persist even in the absence of an applied voltage. In this way, these small blocks of nanoporous sugar function as a non‐volatile RRAM memory elements that can be repeatedly read, erased, and re‐written. These properties derive from ionic current within the MOF and the deposition of nanometer‐thin passivating layers at the anode flanking the MOF crystal. The observed phenomena are crucially dependent on the sub‐nanometer widths of the channels in the MOF, allowing the passage of only smaller ions. Conversely, with the electrolyte present but no MOF, there are no memristance or memory effects. Memories are forever: The sub‐nanometer pore size that exists in a metal–organic framework allows electrical information to be written, read, and re‐written when that MOF is infiltrated with an ionic electrolyte.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201309642