Figure 2: Microstructure of the P-doped SiO 2 films.
From: Artificial synapse network on inorganic proton conductor for neuromorphic systems

(a) The cross-sectional SEM image of the P-doped nanogranular SiO2 electrolyte films. (Scale bar: 500 nm). (b) High-resolution TEM image of the P-doped SiO2 electrolyte films on TEM Cu grid (Scale bar: 40 nm).