Regensburg 2022 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Interfaces and Thin Films and Responsive and Adaptive Systems

CPP 37.8: Talk

Thursday, September 8, 2022, 12:45–13:00, H39

A purely ionic voltage effect soft triod — •Elalyaa Mohamed, Sabine Josten, and Frank Marlow — Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr

Iontronics is a concept of connecting ionic transport, storage and reactions with electronics. As ions are the language of nature and electrons are the language of man-made information processing, connecting both may lead to more understanding of nature as well as to new computational systems which might be called neuromorphic. In the last decade, many iontronic devices were invented and studied. However, developing of iontronics requires the invention of more flexible devices. In our lab we developed a purely ionic voltage effect soft triode (IVEST) based on interfacial ion adsorption and redox oxidizer depletion. The IVEST was built with no need of sophisticated or expensive materials. This device is an electrochemical micro-cell, which consists of a top electrode and two bottom electrodes. The basic idea of this device is to control the concentration and diffusion of ions by the voltage applied on the top electrode. In different electrical circuit configurations, it can show amplification or memory effects. The device had an electrical current amplification reaching 52 and memory effects in the electrical resistance lasting for up to 6 h. These values were achieved by tuning an electrode interface, the electrolyte and diffusion properties. They might be promising for neuromorphic applications.