Nanoscale mapping of oxygen vacancy kinetics in nanocrystalline Samarium doped ceria thin films

被引：18

作者：

Doria, Sandra ^{[1
,2
]}

Yang, Nan ^{[1
,3
,4
]}

Kumar, Amit ^{[5
]}

Jesse, Stephen ^{[5
]}

Tebano, Antonello ^{[3
,4
]}

Aruta, Carmela ^{[3
,4
]}

Di Bartolomeo, Elisabetta ^{[1
,6
]}

Arruda, Thomas M. ^{[5
]}

Kalinin, Sergei V. ^{[5
]}

Licoccia, Silvia ^{[1
,6
]}

Balestrino, Giuseppe ^{[3
,4
]}

机构：

[1] Univ Roma Tor Vergata, NAST Ctr, I-00133 Rome, Italy

[2] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy

[3] Univ Roma Tor Vergata, CNR SPIN, I-00133 Rome, Italy

[4] Univ Roma Tor Vergata, Dept DICII, I-00133 Rome, Italy

[5] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[6] Univ Roma Tor Vergata, Dept Chem Sci & Technol, I-00133 Rome, Italy

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 17期

关键词：

IONIC-CONDUCTION; TRANSPORT; ELECTROLYTES; PERMEABILITY; DIFFUSION; SURFACES;

D O I：

10.1063/1.4826685

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The position-dependent oxygen vacancy dynamics induced by a biased scanning probe microscopy tip in Samarium doped ceria thin films grown on MgO (100) substrates is investigated. The granularity of the samples gives rise to spatially dependent local electrochemical activity, as explored by electrochemical strain microscopy. The kinetics of the oxygen vacancy relaxation process is investigated separately for grain boundaries and grains. Higher oxygen vacancy concentration variation and slower diffusion are observed in the grain boundary regions as compared to the grains. (C) 2013 AIP Publishing LLC.

引用

页数：4

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