Reactive solid-phase epitaxial growth of NaxCoO2 (x ∼ 0.83) via lateral diffusion of Na into a cobalt oxide epitaxial layer

Hiromichi Ohta; Sung Wng Kim; Shingo Ohta; Kunihito Koumoto; Masahiro Hirano; Hideo Hosono

doi:10.1021/cg049818c

Reactive solid-phase epitaxial growth of Na_xCoO₂ (x ∼ 0.83) via lateral diffusion of Na into a cobalt oxide epitaxial layer

Hiromichi Ohta
, Sung Wng Kim
, Shingo Ohta
, Kunihito Koumoto
, Masahiro Hirano
, Hideo Hosono

Nagoya University
Japan Science and Technology Agency
Institute of Science Tokyo

Research output: Contribution to journal › Article › peer-review

68 Scopus citations

Abstract

High-quality epitaxial films of layered cobaltite Na_0.83CoO ₂ were successfully grown on (0001)-oriented α-Al ₂O₃ substrate by reactive solid-phase epitaxy using CoO epitaxial layer and NaHCO₃ powder. First, the thermal oxidation of the CoO film into Co₃O₄ occurs at a lower temperature (300-500°C), then a Na_0.83CoO₂ epitaxial layer formed via lateral diffusion of Na⁺ ions together with oxide ions into Co₃O₄ layers.

Original language	English
Pages (from-to)	25-28
Number of pages	4
Journal	Crystal Growth and Design
Volume	5
Issue number	1
DOIs	https://doi.org/10.1021/cg049818c
State	Published - Jan 2005
Externally published	Yes

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10.1021/cg049818c

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title = "Reactive solid-phase epitaxial growth of NaxCoO2 (x ∼ 0.83) via lateral diffusion of Na into a cobalt oxide epitaxial layer",

abstract = "High-quality epitaxial films of layered cobaltite Na0.83CoO 2 were successfully grown on (0001)-oriented α-Al 2O3 substrate by reactive solid-phase epitaxy using CoO epitaxial layer and NaHCO3 powder. First, the thermal oxidation of the CoO film into Co3O4 occurs at a lower temperature (300-500°C), then a Na0.83CoO2 epitaxial layer formed via lateral diffusion of Na+ ions together with oxide ions into Co3O4 layers.",

author = "Hiromichi Ohta and Kim, \{Sung Wng\} and Shingo Ohta and Kunihito Koumoto and Masahiro Hirano and Hideo Hosono",

year = "2005",

month = jan,

doi = "10.1021/cg049818c",

language = "English",

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journal = "Crystal Growth and Design",

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T1 - Reactive solid-phase epitaxial growth of NaxCoO2 (x ∼ 0.83) via lateral diffusion of Na into a cobalt oxide epitaxial layer

AU - Ohta, Hiromichi

AU - Kim, Sung Wng

AU - Ohta, Shingo

AU - Koumoto, Kunihito

AU - Hirano, Masahiro

AU - Hosono, Hideo

PY - 2005/1

Y1 - 2005/1

N2 - High-quality epitaxial films of layered cobaltite Na0.83CoO 2 were successfully grown on (0001)-oriented α-Al 2O3 substrate by reactive solid-phase epitaxy using CoO epitaxial layer and NaHCO3 powder. First, the thermal oxidation of the CoO film into Co3O4 occurs at a lower temperature (300-500°C), then a Na0.83CoO2 epitaxial layer formed via lateral diffusion of Na+ ions together with oxide ions into Co3O4 layers.

AB - High-quality epitaxial films of layered cobaltite Na0.83CoO 2 were successfully grown on (0001)-oriented α-Al 2O3 substrate by reactive solid-phase epitaxy using CoO epitaxial layer and NaHCO3 powder. First, the thermal oxidation of the CoO film into Co3O4 occurs at a lower temperature (300-500°C), then a Na0.83CoO2 epitaxial layer formed via lateral diffusion of Na+ ions together with oxide ions into Co3O4 layers.

UR - https://www.scopus.com/pages/publications/12844268468

U2 - 10.1021/cg049818c

DO - 10.1021/cg049818c

M3 - Article

AN - SCOPUS:12844268468

SN - 1528-7483

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JO - Crystal Growth and Design

JF - Crystal Growth and Design

IS - 1

ER -

Reactive solid-phase epitaxial growth of Na_xCoO₂ (x ∼ 0.83) via lateral diffusion of Na into a cobalt oxide epitaxial layer

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