Faculty Publications

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Author: search.filters.author.Al-Shidaifat, A.Subject: search.filters.subject.Electrodes

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    A novel characterization and performance measurement of memristor devices for synaptic emulators in advanced neuro-computing
    (MDPI AG indexing@mdpi.com Postfach Basel CH-4005, 2020) Al-Shidaifat, A.; Chakrabartty, S.; Kumar, S.; Acharjee, S.; Song, H.
    The advanced neuro-computing field requires new memristor devices with great potential as synaptic emulators between pre-and postsynaptic neurons. This paper presents memristor devices with TiO2 Nanoparticles (NPs)/Ag(Silver) and Titanium Dioxide (TiO2) Nanoparticles (NPs)/Au(Gold) electrodes for synaptic emulators in an advanced neurocomputing application. A comparative study between Ag(Silver)-and Au(Gold)-based memristor devices is presented where the Ag electrode provides the improved performance, as compared to the Au electrode. Device characterization is observed by the Scanning Electron Microscope (SEM) image, which displays the grown electrode, while the morphology of nanoparticles (NPs) is verified by Atomic Force Microscopy (AFM). The resistive switching (RS) phenomena observed in Ag/TiO2 and Au/TiO2 shows the sweeping mechanism for low resistance and high resistance states. The resistive switching time of Au/TiO2 NPs and Ag/TiO2 NPs is calculated, while the theoretical validation of the memory window demonstrates memristor behavior as a synaptic emulator. Measurement of the capacitor-voltage curve shows that the memristor with Ag contact is a good candidate for charge storage as compared to Au. The classification of 3 x 3 pixel black/white image is demonstrated by the 3 x 3 cross bar memristor with pre-and post-neuron system. The proposed memristor devices with the Ag electrode demonstrate the adequate performance compared to the Au electrode, and may present noteworthy advantages in the field of neuromorphic computing. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.
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    An artificial bridge circuit approach between two biological neurons using nanoscale topologies towards paralytic disorders
    (Elsevier Ltd, 2023) Haque, M.N.; Gorre, P.; Naik, D.N.; Kumar, S.; Al-Shidaifat, A.; Song, H.
    The advent of Nanoscale IC technology towards pulse-based neural systems reactivates the dead nervous about restoring the functionality of paralytic disorders. This work reports in first time a design of a novel CMOS biological neuron system, which replaces a dead neuron between two neurons to restore communication in paralyzed individuals. The work binds into three stages: design of a spiking leaky Integrator and Fire (LIF) neuron with refractory period mechanisms, which achieves a low power consumption of 2.4 μW, in the first stage; an adaptive homeostatic synapse with short and long-term spike plasticity, that reconfigure the spiking neuron networks of multichannel sensor electrodes to record the electric signal from the active cell as second stage; the final stage presents a low-power common source current reuse regulated cascode (CS-CR-RGC) TIA for amplifying the weak synapse current signal, which achieves a high gain of 135.71 dBΩ with an optimized noise performance of 0.19 pA/Hz. The entire work is designed and implemented using a CMOS 65 nm commercial process that occupies a die area of 400 μm × 120 μm. © 2023