A study of the memory effects of metallic core-metal oxide shell nanocrystals by a micelle dipping technique.
With a simple and conformal metal nanocrystal dipping of synthesized micelles, nonvolatile memory characteristics originating from a metallic cobalt (Co) core nanocrystal (NC) surrounded by a Co-oxide shell are investigated in this study. From transmission electron microscopy (TEM) and x-ray photoelectron spectroscopy (XPS), it was confirmed that Co-oxide was made by oxygen plasma for polymer oxidation and that metallic Co wrapped with a Co-oxide shell was made by hydrogen annealing in order to reduce the Co-oxide. Energy band diagrams considering the extent of the coexistent metallic Co/Co-oxide were also analyzed in terms of how they correspond to each program/erase/retention case. These cases were verified by electrically measured data. These results can provide a guideline for the design and optimization of metal NC embedded memory.
Kim
Chung-Jin
CJ
Department of Electrical Engineering, College of Information Science and Technology KAIST, Yuseong-gu, Daejeon, Republic of Korea.
Choi
Sung-Jin
SJ
Ryu
Seong-Wan
SW
Kim
Sungho
S
Chang
Jae-Joon
JJ
Bae
Su Hak
SH
Sohn
Byeong-Hyeok
BH
Choi
Yang-Kyu
YK