Although materials and processes are different from biological cells’, brain mimicries led to tre... more Although materials and processes are different from biological cells’, brain mimicries led to tremendous achievements in massively parallel information processing via neuromorphic engineering. Inexistent in electronics, we describe how to emulate dendritic morphogenesis by electropolymerization in water, aiming in operando material modification for hardware learning. The systematic study of applied voltage-pulse parameters details on tuning independently morphological aspects of micrometric dendrites’: as fractal number, branching degree, asymmetry, density or length. Time-lapse image processing of their growth shows the spatial features to be dynamically-dependent and expand distinctively before and after forming a conductive bridging of two electrochemically grown dendrites. Circuit-element analysis and electrochemical impedance spectroscopy confirms their morphological control to occur in temporal windows where the growth kinetics can be finely perturbed by the input signal frequ...
We report on the comparison between two different driving circuits for addressing micro-fabricate... more We report on the comparison between two different driving circuits for addressing micro-fabricated organic electrochemical transistors of different channel resistances and transconductance, aiming for neuromorphic sensing. The Wheatstone bridge configuration shows interesting results by offering more versatility towards higher resistance materials. However, the Current-Voltage converter observed faster transients. Both circuits show different assets very encouraging for further practical application.
Although materials and processes are different from biological cells’, brain mimicries led to tre... more Although materials and processes are different from biological cells’, brain mimicries led to tremendous achievements in massively parallel information processing via neuromorphic engineering. Inexistent in electronics, we describe how to emulate dendritic morphogenesis by electropolymerization in water, aiming in operando material modification for hardware learning. The systematic study of applied voltage-pulse parameters details on tuning independently morphological aspects of micrometric dendrites’: as fractal number, branching degree, asymmetry, density or length. Time-lapse image processing of their growth shows the spatial features to be dynamically-dependent and expand distinctively before and after forming a conductive bridging of two electrochemically grown dendrites. Circuit-element analysis and electrochemical impedance spectroscopy confirms their morphological control to occur in temporal windows where the growth kinetics can be finely perturbed by the input signal frequ...
We report on the comparison between two different driving circuits for addressing micro-fabricate... more We report on the comparison between two different driving circuits for addressing micro-fabricated organic electrochemical transistors of different channel resistances and transconductance, aiming for neuromorphic sensing. The Wheatstone bridge configuration shows interesting results by offering more versatility towards higher resistance materials. However, the Current-Voltage converter observed faster transients. Both circuits show different assets very encouraging for further practical application.
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Papers by Mahdi Ghazal