Detection of Nanoscale Structural Defects in Degraded Fe-Doped SrTiO3 by Ultrafast Photoacoustic Waves

Ying Zhang, Onur Kurt, David Ascienzo, Qian Yang, Tony Le, Steve Greenbaum, Thorsten J.M. Bayer, Clive A. Randall, Yuhang Ren

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Strontium titanate, SrTiO3, has been intensively investigated as a model material in defect chemistry research. The underlying mechanism of the effects associated with a large variety of defects often requires microstructure imaging. In the present work, the distribution of nanoscale structural defects in electrodegraded Fe-doped SrTiO3 (Fe:STO) single crystals is directly revealed by ultrafast photoacoustic waves. We utilized time-resolved reflectance spectra to nondestructively characterize local structural distortions near the degraded anode and cathode interfaces in both the reduced and oxidized crystals along with transmission electron microscopy to image these defects. We show that an accumulation of oxygen vacancies resulted in significant structural deformations near the degraded cathode interface of the reduced crystal. The defect distribution shows a strong dependence on oxygen vacancy concentration and diffusion within the crystals.

Original languageEnglish (US)
Pages (from-to)12864-12868
Number of pages5
JournalJournal of Physical Chemistry C
Volume122
Issue number24
DOIs
StatePublished - Jun 21 2018

Fingerprint

Photoacoustic effect
Defects
defects
Oxygen vacancies
Crystals
Cathodes
cathodes
crystals
oxygen
Strontium
doped crystals
strontium
Anodes
anodes
strontium titanium oxide
Single crystals
chemistry
Transmission electron microscopy
reflectance
Imaging techniques

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Zhang, Ying ; Kurt, Onur ; Ascienzo, David ; Yang, Qian ; Le, Tony ; Greenbaum, Steve ; Bayer, Thorsten J.M. ; Randall, Clive A. ; Ren, Yuhang. / Detection of Nanoscale Structural Defects in Degraded Fe-Doped SrTiO3 by Ultrafast Photoacoustic Waves. In: Journal of Physical Chemistry C. 2018 ; Vol. 122, No. 24. pp. 12864-12868.
@article{19efb73d239f4d20bd9b41e2775373be,
title = "Detection of Nanoscale Structural Defects in Degraded Fe-Doped SrTiO3 by Ultrafast Photoacoustic Waves",
abstract = "Strontium titanate, SrTiO3, has been intensively investigated as a model material in defect chemistry research. The underlying mechanism of the effects associated with a large variety of defects often requires microstructure imaging. In the present work, the distribution of nanoscale structural defects in electrodegraded Fe-doped SrTiO3 (Fe:STO) single crystals is directly revealed by ultrafast photoacoustic waves. We utilized time-resolved reflectance spectra to nondestructively characterize local structural distortions near the degraded anode and cathode interfaces in both the reduced and oxidized crystals along with transmission electron microscopy to image these defects. We show that an accumulation of oxygen vacancies resulted in significant structural deformations near the degraded cathode interface of the reduced crystal. The defect distribution shows a strong dependence on oxygen vacancy concentration and diffusion within the crystals.",
author = "Ying Zhang and Onur Kurt and David Ascienzo and Qian Yang and Tony Le and Steve Greenbaum and Bayer, {Thorsten J.M.} and Randall, {Clive A.} and Yuhang Ren",
year = "2018",
month = "6",
day = "21",
doi = "10.1021/acs.jpcc.8b03240",
language = "English (US)",
volume = "122",
pages = "12864--12868",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "24",

}

Zhang, Y, Kurt, O, Ascienzo, D, Yang, Q, Le, T, Greenbaum, S, Bayer, TJM, Randall, CA & Ren, Y 2018, 'Detection of Nanoscale Structural Defects in Degraded Fe-Doped SrTiO3 by Ultrafast Photoacoustic Waves', Journal of Physical Chemistry C, vol. 122, no. 24, pp. 12864-12868. https://doi.org/10.1021/acs.jpcc.8b03240

Detection of Nanoscale Structural Defects in Degraded Fe-Doped SrTiO3 by Ultrafast Photoacoustic Waves. / Zhang, Ying; Kurt, Onur; Ascienzo, David; Yang, Qian; Le, Tony; Greenbaum, Steve; Bayer, Thorsten J.M.; Randall, Clive A.; Ren, Yuhang.

In: Journal of Physical Chemistry C, Vol. 122, No. 24, 21.06.2018, p. 12864-12868.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Detection of Nanoscale Structural Defects in Degraded Fe-Doped SrTiO3 by Ultrafast Photoacoustic Waves

AU - Zhang, Ying

AU - Kurt, Onur

AU - Ascienzo, David

AU - Yang, Qian

AU - Le, Tony

AU - Greenbaum, Steve

AU - Bayer, Thorsten J.M.

AU - Randall, Clive A.

AU - Ren, Yuhang

PY - 2018/6/21

Y1 - 2018/6/21

N2 - Strontium titanate, SrTiO3, has been intensively investigated as a model material in defect chemistry research. The underlying mechanism of the effects associated with a large variety of defects often requires microstructure imaging. In the present work, the distribution of nanoscale structural defects in electrodegraded Fe-doped SrTiO3 (Fe:STO) single crystals is directly revealed by ultrafast photoacoustic waves. We utilized time-resolved reflectance spectra to nondestructively characterize local structural distortions near the degraded anode and cathode interfaces in both the reduced and oxidized crystals along with transmission electron microscopy to image these defects. We show that an accumulation of oxygen vacancies resulted in significant structural deformations near the degraded cathode interface of the reduced crystal. The defect distribution shows a strong dependence on oxygen vacancy concentration and diffusion within the crystals.

AB - Strontium titanate, SrTiO3, has been intensively investigated as a model material in defect chemistry research. The underlying mechanism of the effects associated with a large variety of defects often requires microstructure imaging. In the present work, the distribution of nanoscale structural defects in electrodegraded Fe-doped SrTiO3 (Fe:STO) single crystals is directly revealed by ultrafast photoacoustic waves. We utilized time-resolved reflectance spectra to nondestructively characterize local structural distortions near the degraded anode and cathode interfaces in both the reduced and oxidized crystals along with transmission electron microscopy to image these defects. We show that an accumulation of oxygen vacancies resulted in significant structural deformations near the degraded cathode interface of the reduced crystal. The defect distribution shows a strong dependence on oxygen vacancy concentration and diffusion within the crystals.

UR - http://www.scopus.com/inward/record.url?scp=85047741044&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85047741044&partnerID=8YFLogxK

U2 - 10.1021/acs.jpcc.8b03240

DO - 10.1021/acs.jpcc.8b03240

M3 - Article

AN - SCOPUS:85047741044

VL - 122

SP - 12864

EP - 12868

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 24

ER -