Tunable Intervalence Charge Transfer in Ruthenium Prussian Blue Analog Enables Stable and Efficient Biocompatible Artificial Synapses.

Autor: Robinson DA; Sandia National Laboratories, Livermore, CA, 94550, USA., Foster ME; Sandia National Laboratories, Livermore, CA, 94550, USA., Bennett CH; Sandia National Laboratories, Albuquerque, NM, 87123, USA., Bhandarkar A; Sandia National Laboratories, Livermore, CA, 94550, USA., Webster ER; Sandia National Laboratories, Livermore, CA, 94550, USA., Celebi A; Sandia National Laboratories, Livermore, CA, 94550, USA., Celebi N; Sandia National Laboratories, Livermore, CA, 94550, USA., Fuller EJ; Sandia National Laboratories, Livermore, CA, 94550, USA., Stavila V; Sandia National Laboratories, Livermore, CA, 94550, USA., Spataru CD; Sandia National Laboratories, Livermore, CA, 94550, USA., Ashby DS; Sandia National Laboratories, Livermore, CA, 94550, USA., Marinella MJ; School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ, 85281, USA., Krishnakumar R; Sandia National Laboratories, Livermore, CA, 94550, USA., Allendorf MD; Sandia National Laboratories, Livermore, CA, 94550, USA., Talin AA; Sandia National Laboratories, Livermore, CA, 94550, USA.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2023 Sep; Vol. 35 (37), pp. e2207595. Date of Electronic Publication: 2022 Dec 21.
DOI: 10.1002/adma.202207595
Abstrakt: Emerging concepts for neuromorphic computing, bioelectronics, and brain-computer interfacing inspire new research avenues aimed at understanding the relationship between oxidation state and conductivity in unexplored materials. This report expands the materials playground for neuromorphic devices to include a mixed valence inorganic 3D coordination framework, a ruthenium Prussian blue analog (RuPBA), for flexible and biocompatible artificial synapses that reversibly switch conductance by more than four orders of magnitude based on electrochemically tunable oxidation state. The electrochemically tunable degree of mixed valency and electronic coupling between N-coordinated Ru sites controls the carrier concentration and mobility, as supported by density functional theory computations and application of electron transfer theory to in situ spectroscopy of intervalence charge transfer. Retention of programmed states is improved by nearly two orders of magnitude compared to extensively studied organic polymers, thus reducing the frequency, complexity, and energy costs associated with error correction schemes. This report demonstrates dopamine-mediated plasticity of RuPBA synapses and biocompatibility of RuPBA with neuronal cells, evoking prospective application for brain-computer interfacing.
(© 2022 Wiley-VCH GmbH.)
Databáze: MEDLINE
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