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Artificial Synaptic Behavior of Aloe Polysaccharides-Based Device with Au as Top Electrode

  • Z. X. Lim (a1), I. A. Tayeb (a1), Z. A. A. Hamid (a1), M. F. Ain (a2), A. M. Hashim (a3), J. M. Abdullah (a4), A. A. Sivkov (a5), F. Zhao (a5) and K. Y. Cheong (a1)...

Abstract

Formulated, processed, and dried Aloe polysaccharides thin film sandwiched between ITO as bottom electrode and Au as top electrode has been adopted as an artificial synapse to emulate behavior of neuromorphic computing. The synaptic plasticity or weight has been modulated with this simple metal-insulator-metal structure by applying voltage sweep and voltage pulse, with excitatory postsynaptic current being monitored. Synaptic potentiation and depression has been demonstrated by applying 6 consecutive sweeps of voltage in positive and negative polarity, respectively. By varying number (10 – 50) of voltage pulses, variable synaptic weight has been measured with paired pulse facilitation and post-tetanic potentiation indexes of 2.61x10-6and 1.45x10-4, respectively. The short-term plasticity and long-term potentiation can be clearly revealed when applying 40 pulses and beyond, with extracted time constants of approximately 28 s at 40 pulses and 90 s at 50 pulses.

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Keywords

Artificial Synaptic Behavior of Aloe Polysaccharides-Based Device with Au as Top Electrode

  • Z. X. Lim (a1), I. A. Tayeb (a1), Z. A. A. Hamid (a1), M. F. Ain (a2), A. M. Hashim (a3), J. M. Abdullah (a4), A. A. Sivkov (a5), F. Zhao (a5) and K. Y. Cheong (a1)...

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