View : 11 Download: 0

Soft-chemical exfoliation route to layered cobalt oxide monolayers and its application for film deposition and nanoparticle synthesis

Title
Soft-chemical exfoliation route to layered cobalt oxide monolayers and its application for film deposition and nanoparticle synthesis
Authors
Kim T.W.Oh E.-J.Jee A.-Y.Lim S.T.Park D.H.Lee M.Hyun S.-H.Choy J.-H.Hwang S.-J.
Ewha Authors
이민영최진호황성주
SCOPUS Author ID
이민영scopus; 최진호scopus; 황성주scopus
Issue Date
2009
Journal Title
Chemistry - A European Journal
ISSN
0947-6539JCR Link
Citation
vol. 15, no. 41, pp. 10752 - 10761
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
A colloidal suspension of exfoliated, layered cobalt oxide nanosheets has been synthesized through the intercalation of quaternary tetramethylammonium ions into protonated lithium cobalt oxide. According to atomic force microscopy, exfoliated nanosheets of layered cobalt oxide show a plateau-like height profile with nanometer-level height, underscoring the formation of unilamellar 2D nanosheets. The exfoliation of layered cobalt oxide was cross-confirmed by X-ray diffraction, UV/Vis spectroscopy, and transmission electron microscopy. The maintenance of the hexagonal inplane structure of the cobalt oxide lattice after the exfoliation process was evidenced by selected-area electron diffraction and Co K-edge X-ray absorption near-edge structure analysis. The zeta-potential measurements clearly demonstrated the negative surface charge of cobalt oxide nanosheets. Adopting the nanosheets of layered cobalt oxide as a precursor, we were able to prepare the monodisperse CoO nanocrystals with a particle size of ≈ 10 nm as well as the heterolayered film composed of cobalt oxide monolayer and polycation. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.
DOI
10.1002/chem.200901590
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE