Flexible bio-memristive devices based on chicken egg albumen:Au@SiO2 core-shell nanoparticle nanocomposites

Abstract

Flexible bio-memristive (FBM) devices utilizing chicken egg albumen (CEA):Au@SiO₂ core-shell nanoparticle nanocomposites were fabricated on indium-tin-oxide (ITO) coated polyethylene naphthalate (PEN) substrates. Current-voltage (I-V) curves for the Al/CEA:Au@SiO₂ core-shell nanoparticle/ITO/PEN devices showed clockwise current hysteresis behaviors due to the existence of the CEA:Au@SiO₂ core-shell nanoparticle nanocomposites. The endurance number of the ON/OFF switching for the FBM devices was above 10² cycles. An ON/OFF current ratio of 1 × 10⁵ was maintained for retention times longer than 1 × 10⁴ s. The memory characteristics of the FBM devices after bending were similar to those before bending. The memory margin and the stability of FBM devices were enhanced due to the embedded Au@SiO₂ core-shell nanoparticles. The switching mechanisms occurring in the Al/CEA:Au@SiO₂ core-shell nanoparticle/ITO-coated PEN devices are described on the basis of the I-V results and the filament mechanisms.