Electrochemical stability of (La,Sr)CoO3-δ in (La,Sr)CoO3-δ/(Ce, Gd)O2-δ heterostructures

Lucia Dos Santos Gómez, Simone Sanna, Poul Norby, Nini Pryds, Enrique R. Losilla, David Marrero-López, Vincenzo Esposito*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

1 Downloads (Pure)

Abstract

A modulated coherent (La,Sr)CoO3-δ/(Ce,Gd)O2-δ heterostructure is characterized for the first time for its electronic and chemical properties. 2D-multilayer architectures are deposited on NdGaO3 (110) single crystal substrate by pulsed laser deposition, resulting in epitaxial structures with in-plane lattice rotation that, via the metal oxides´ interfaces, induces mutual structural rearrangements. Our results show that (La,Sr)CoO3-d thin films of 10-100 nm are chemically unstable when exposed to air at 600 °C during electrical cyclic stress-tests. Conversely, improved stability is achieved confining LSC in the nanometric heterostructure. Remarkably, the chemical stabilization occurs without compromising substantially the electrical properties of the LSC component: the heterostructures show unexpected electrical behavior with dominant electronic contributions, fast conductivity and mixed ionic-electronic properties, depending on the number of interfaces and the nano-scaled layers.
Original languageEnglish
JournalNanoscale
Volume11
Issue number6
Pages (from-to)2916-2924
ISSN2040-3364
DOIs
Publication statusPublished - 2019

Cite this

Dos Santos Gómez, Lucia ; Sanna, Simone ; Norby, Poul ; Pryds, Nini ; Losilla, Enrique R. ; Marrero-López, David ; Esposito, Vincenzo. / Electrochemical stability of (La,Sr)CoO3-δ in (La,Sr)CoO3-δ/(Ce, Gd)O2-δ heterostructures. In: Nanoscale. 2019 ; Vol. 11, No. 6. pp. 2916-2924.
@article{ab4690e5c17a454d85c3f1b31b5f122d,
title = "Electrochemical stability of (La,Sr)CoO3-δ in (La,Sr)CoO3-δ/(Ce, Gd)O2-δ heterostructures",
abstract = "A modulated coherent (La,Sr)CoO3-δ/(Ce,Gd)O2-δ heterostructure is characterized for the first time for its electronic and chemical properties. 2D-multilayer architectures are deposited on NdGaO3 (110) single crystal substrate by pulsed laser deposition, resulting in epitaxial structures with in-plane lattice rotation that, via the metal oxides´ interfaces, induces mutual structural rearrangements. Our results show that (La,Sr)CoO3-d thin films of 10-100 nm are chemically unstable when exposed to air at 600 °C during electrical cyclic stress-tests. Conversely, improved stability is achieved confining LSC in the nanometric heterostructure. Remarkably, the chemical stabilization occurs without compromising substantially the electrical properties of the LSC component: the heterostructures show unexpected electrical behavior with dominant electronic contributions, fast conductivity and mixed ionic-electronic properties, depending on the number of interfaces and the nano-scaled layers.",
author = "{Dos Santos G{\'o}mez}, Lucia and Simone Sanna and Poul Norby and Nini Pryds and Losilla, {Enrique R.} and David Marrero-L{\'o}pez and Vincenzo Esposito",
year = "2019",
doi = "10.1039/C8NR08528E",
language = "English",
volume = "11",
pages = "2916--2924",
journal = "Nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
number = "6",

}

Electrochemical stability of (La,Sr)CoO3-δ in (La,Sr)CoO3-δ/(Ce, Gd)O2-δ heterostructures. / Dos Santos Gómez, Lucia; Sanna, Simone; Norby, Poul; Pryds, Nini; Losilla, Enrique R. ; Marrero-López, David ; Esposito, Vincenzo.

In: Nanoscale, Vol. 11, No. 6, 2019, p. 2916-2924.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Electrochemical stability of (La,Sr)CoO3-δ in (La,Sr)CoO3-δ/(Ce, Gd)O2-δ heterostructures

AU - Dos Santos Gómez, Lucia

AU - Sanna, Simone

AU - Norby, Poul

AU - Pryds, Nini

AU - Losilla, Enrique R.

AU - Marrero-López, David

AU - Esposito, Vincenzo

PY - 2019

Y1 - 2019

N2 - A modulated coherent (La,Sr)CoO3-δ/(Ce,Gd)O2-δ heterostructure is characterized for the first time for its electronic and chemical properties. 2D-multilayer architectures are deposited on NdGaO3 (110) single crystal substrate by pulsed laser deposition, resulting in epitaxial structures with in-plane lattice rotation that, via the metal oxides´ interfaces, induces mutual structural rearrangements. Our results show that (La,Sr)CoO3-d thin films of 10-100 nm are chemically unstable when exposed to air at 600 °C during electrical cyclic stress-tests. Conversely, improved stability is achieved confining LSC in the nanometric heterostructure. Remarkably, the chemical stabilization occurs without compromising substantially the electrical properties of the LSC component: the heterostructures show unexpected electrical behavior with dominant electronic contributions, fast conductivity and mixed ionic-electronic properties, depending on the number of interfaces and the nano-scaled layers.

AB - A modulated coherent (La,Sr)CoO3-δ/(Ce,Gd)O2-δ heterostructure is characterized for the first time for its electronic and chemical properties. 2D-multilayer architectures are deposited on NdGaO3 (110) single crystal substrate by pulsed laser deposition, resulting in epitaxial structures with in-plane lattice rotation that, via the metal oxides´ interfaces, induces mutual structural rearrangements. Our results show that (La,Sr)CoO3-d thin films of 10-100 nm are chemically unstable when exposed to air at 600 °C during electrical cyclic stress-tests. Conversely, improved stability is achieved confining LSC in the nanometric heterostructure. Remarkably, the chemical stabilization occurs without compromising substantially the electrical properties of the LSC component: the heterostructures show unexpected electrical behavior with dominant electronic contributions, fast conductivity and mixed ionic-electronic properties, depending on the number of interfaces and the nano-scaled layers.

U2 - 10.1039/C8NR08528E

DO - 10.1039/C8NR08528E

M3 - Journal article

VL - 11

SP - 2916

EP - 2924

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 6

ER -