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Jeong, Hu Young
UNIST Central Research Facilities (UCRF)
Research Interests
  • Soft material characterization such as graphene using a low kV Cs-corrected TEM
  • Insitu-TEM characterization of carbon-based materials using nanofactory STM holder for Li-ion battery application
  • Structural characterization of mesoporous materials using SEM & TEM
  • Interface analysis between various oxides and metals through Cs-corrected (S)TEM
  • Resistive switching mechanism of graphene oxide thin films for RRAM application

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Conductive Graphitic Channel in Graphene Oxide-Based Memristive Devices

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Title
Conductive Graphitic Channel in Graphene Oxide-Based Memristive Devices
Author
Kim, Sung KyuKim, Jong YoonJang, Byung ChulCho, Mi SunChoi, Sung-YoolLee, Jeong YongJeong, Hu Young
Issue Date
2016-11
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED FUNCTIONAL MATERIALS, v.26, no.41, pp.7406 - 7414
Abstract
Electrically insulating graphene oxide with various oxygen-functional groups is a novel material as an active layer in resistive switching memories via reduction process. Although many research groups have reported on graphene oxide-based resistive switching memories, revealing the origin of conducting path in a graphene oxide active layer remains a critical challenge. Here nanoscale conductive graphitic channels within graphene oxide films are reported using a low-voltage spherical-aberration-corrected transmission electron microscopy. Simultaneously, these channels with reduced graphene oxide nanosheets induced by the detachment of oxygen groups are verified by Raman intensity ratio map and conductive atomic force microscopy. It is also clearly revealed that Al metallic protrusions, which are generated in the bottom interface layer, assist the local formation of conductive graphitic channels directly onto graphene oxide films by generating a local strong electric field. This work provides essential information for future carbon-based nanoelectronic devices.
URI
https://scholarworks.unist.ac.kr/handle/201301/20750
URL
http://onlinelibrary.wiley.com/doi/10.1002/adfm.201602748/abstract
DOI
10.1002/adfm.201602748
ISSN
1616-301X
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