Nanoionic based memrisitive Devices: Materials and Processes
With Ilia Valov - Research Centre Jülich, Electronic Materials (PGI-7), wilhelm-Johnen Str., 52425 Jülich, Germany
The development of our society and its increasing demands determine significantly the horizon and tasks for the modern science. Three sectors appear especially important – Nanoelectronics & Communications, Energy Conversion & Storage and Medicine/health. All three strategic directions have a common focus – developing of new materials exploring nanoscale phenomena and processes. These new materials should fulfill the requirements for extended functionalities, higher efficiency, low cost, low power consumption and must be environmental friendly.
The lecture, will present the fundamentals and applications of nanoionics-based memristive devices for next generation memories and units for cognitive (neuromoprohic) computing architectures.
Memrsitor and memristor functionalities will be introduced, as well as the decisive role of nanoscale materials and processes. It will be shown that macroscopic definitions for insulator, electrolyte and semiconductor merge at the nanoscale and all these classes of materials are able to conduct ions and undergo electrochemical transformations. The intrinsic and extrinsic factors influencing the nanionic and nanoelectronic properties and their relations to processes and functionalities will be exemplarily discussed. The role of interfaces, interface interactions and local structure changes is highlighted.
Factors such as ionic/electronic conductivity of the solid electrolytes, transference numbers, electrocatalytic activities of active and inert electrodes, effects of moisture, interfaces, corrosion and electrode-electrolyte interactions will be shown to be determining the choice of particular materials system.