title: A study of the memory effects of metallic core-metal oxide shell nanocrystals by a micelle dipping technique.
abstract: 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.
authors.affiliation: Department of Electrical Engineering, College of Information Science and Technology KAIST, Yuseong-gu, Daejeon, Republic of Korea.
authors.forename: Chung-Jin
authors.initials: CJ
authors.lastname: Kim
authors.forename: Sung-Jin
authors.initials: SJ
authors.lastname: Choi
authors.forename: Seong-Wan
authors.initials: SW
authors.lastname: Ryu
authors.forename: Sungho
authors.initials: S
authors.lastname: Kim
authors.forename: Jae-Joon
authors.initials: JJ
authors.lastname: Chang
authors.forename: Su Hak
authors.initials: SH
authors.lastname: Bae
authors.forename: Byeong-Hyeok
authors.initials: BH
authors.lastname: Sohn
authors.forename: Yang-Kyu
authors.initials: YK
authors.lastname: Choi