Nonvolatile Memory Application of Monodispersed Ferritin as a Template for Iron Nanocrystal

다국어 초록 (Multilingual Abstract)

In this letter, we report on the fabrication of a uniform nanocrystal with the introduction of a ferritin template. Due to the identical shape and dimension of ferritin molecules, It is possible to obtain well-controlled nanocrystals after the outer shell elimination. A closely-packed ferritin monolayer was formed through a new droplet evaporation technique and the density was estimated as 6×1011cm-2. We also adopted high pressure (HP) H2 annealing to reduce the ferritin core and the complete reduction was verified via X-ray photoelectron spectroscopy (XPS) analysis. A fabricated nanocrystal memory containing a ferritin core showed significantly improved memory characteristics, including a fast program/erase(P/E) speed and a stable memory window up to 104 s at 85℃ (data retention) and 104 P/E cycles (endurance).