Fig. 2: Material analysis characteristics of cone-shaped n-ZnO thin film.
From: Bio-realistic synaptic characteristics in the cone-shaped ZnO memristive device
a EDX elemental mapping in the vicinity of the 4-μm via-hole device area, confirming each element interface and the ZnO protrusion cones. b The EDX analysis (yellow arrow) determines the oxygen-deficiency in the cone protrusion ZnO thin film
