Synthesis-dependent first-order Raman scattering in SrTiO3 nanocubes at room temperature

Federico A. Rabuffetti, Hack Sung Kim, James A. Enterkin, Yingmin Wang, Courtney H. Lanier, Laurence D. Marks, Kenneth R Poeppelmeier, Peter C Stair

Research output: Contribution to journalArticle

89 Citations (Scopus)

Abstract

Raman spectroscopy was used to demonstrate that the lattice dynamics of SrTiO3 (STO) nanoparticles strongly depends on their microstructure, which is in turn determined by the synthetic approach employed. First-order Raman modes are observed at room temperature in STO single-crystalline nanocubes with average edge lengths of 60 and 120 nm, obtained via sol-precipitation coupled with hydrothermal synthesis and a molten salt procedure, respectively. First-order Raman scattering arises from local loss of inversion symmetry caused by surface frozen dipoles, oxygen vacancies, and impurities incorporated into the host lattice. The presence of polar domains is suggested by the pronounced Fano asymmetry of the peak corresponding to the TO2 polar phonon, which does not vanish at room temperature. These noncentrosymmetric domains will likely influence the dielectric response of these nanoparticles.

Original languageEnglish
Pages (from-to)5628-5635
Number of pages8
JournalChemistry of Materials
Volume20
Issue number17
DOIs
Publication statusPublished - Sep 9 2008

Fingerprint

Raman scattering
Nanoparticles
Lattice vibrations
Hydrothermal synthesis
Polymethyl Methacrylate
Oxygen vacancies
Sols
Raman spectroscopy
Molten materials
Salts
Impurities
Crystalline materials
Temperature
Microstructure
strontium titanium oxide

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Rabuffetti, F. A., Kim, H. S., Enterkin, J. A., Wang, Y., Lanier, C. H., Marks, L. D., ... Stair, P. C. (2008). Synthesis-dependent first-order Raman scattering in SrTiO3 nanocubes at room temperature. Chemistry of Materials, 20(17), 5628-5635. https://doi.org/10.1021/cm801192t

Synthesis-dependent first-order Raman scattering in SrTiO3 nanocubes at room temperature. / Rabuffetti, Federico A.; Kim, Hack Sung; Enterkin, James A.; Wang, Yingmin; Lanier, Courtney H.; Marks, Laurence D.; Poeppelmeier, Kenneth R; Stair, Peter C.

In: Chemistry of Materials, Vol. 20, No. 17, 09.09.2008, p. 5628-5635.

Research output: Contribution to journalArticle

Rabuffetti FA, Kim HS, Enterkin JA, Wang Y, Lanier CH, Marks LD et al. Synthesis-dependent first-order Raman scattering in SrTiO3 nanocubes at room temperature. Chemistry of Materials. 2008 Sep 9;20(17):5628-5635. https://doi.org/10.1021/cm801192t
Rabuffetti, Federico A. ; Kim, Hack Sung ; Enterkin, James A. ; Wang, Yingmin ; Lanier, Courtney H. ; Marks, Laurence D. ; Poeppelmeier, Kenneth R ; Stair, Peter C. / Synthesis-dependent first-order Raman scattering in SrTiO3 nanocubes at room temperature. In: Chemistry of Materials. 2008 ; Vol. 20, No. 17. pp. 5628-5635.
@article{2e4b38856c69455889c75e6b36d92668,
title = "Synthesis-dependent first-order Raman scattering in SrTiO3 nanocubes at room temperature",
abstract = "Raman spectroscopy was used to demonstrate that the lattice dynamics of SrTiO3 (STO) nanoparticles strongly depends on their microstructure, which is in turn determined by the synthetic approach employed. First-order Raman modes are observed at room temperature in STO single-crystalline nanocubes with average edge lengths of 60 and 120 nm, obtained via sol-precipitation coupled with hydrothermal synthesis and a molten salt procedure, respectively. First-order Raman scattering arises from local loss of inversion symmetry caused by surface frozen dipoles, oxygen vacancies, and impurities incorporated into the host lattice. The presence of polar domains is suggested by the pronounced Fano asymmetry of the peak corresponding to the TO2 polar phonon, which does not vanish at room temperature. These noncentrosymmetric domains will likely influence the dielectric response of these nanoparticles.",
author = "Rabuffetti, {Federico A.} and Kim, {Hack Sung} and Enterkin, {James A.} and Yingmin Wang and Lanier, {Courtney H.} and Marks, {Laurence D.} and Poeppelmeier, {Kenneth R} and Stair, {Peter C}",
year = "2008",
month = "9",
day = "9",
doi = "10.1021/cm801192t",
language = "English",
volume = "20",
pages = "5628--5635",
journal = "Chemistry of Materials",
issn = "0897-4756",
publisher = "American Chemical Society",
number = "17",

}

TY - JOUR

T1 - Synthesis-dependent first-order Raman scattering in SrTiO3 nanocubes at room temperature

AU - Rabuffetti, Federico A.

AU - Kim, Hack Sung

AU - Enterkin, James A.

AU - Wang, Yingmin

AU - Lanier, Courtney H.

AU - Marks, Laurence D.

AU - Poeppelmeier, Kenneth R

AU - Stair, Peter C

PY - 2008/9/9

Y1 - 2008/9/9

N2 - Raman spectroscopy was used to demonstrate that the lattice dynamics of SrTiO3 (STO) nanoparticles strongly depends on their microstructure, which is in turn determined by the synthetic approach employed. First-order Raman modes are observed at room temperature in STO single-crystalline nanocubes with average edge lengths of 60 and 120 nm, obtained via sol-precipitation coupled with hydrothermal synthesis and a molten salt procedure, respectively. First-order Raman scattering arises from local loss of inversion symmetry caused by surface frozen dipoles, oxygen vacancies, and impurities incorporated into the host lattice. The presence of polar domains is suggested by the pronounced Fano asymmetry of the peak corresponding to the TO2 polar phonon, which does not vanish at room temperature. These noncentrosymmetric domains will likely influence the dielectric response of these nanoparticles.

AB - Raman spectroscopy was used to demonstrate that the lattice dynamics of SrTiO3 (STO) nanoparticles strongly depends on their microstructure, which is in turn determined by the synthetic approach employed. First-order Raman modes are observed at room temperature in STO single-crystalline nanocubes with average edge lengths of 60 and 120 nm, obtained via sol-precipitation coupled with hydrothermal synthesis and a molten salt procedure, respectively. First-order Raman scattering arises from local loss of inversion symmetry caused by surface frozen dipoles, oxygen vacancies, and impurities incorporated into the host lattice. The presence of polar domains is suggested by the pronounced Fano asymmetry of the peak corresponding to the TO2 polar phonon, which does not vanish at room temperature. These noncentrosymmetric domains will likely influence the dielectric response of these nanoparticles.

UR - http://www.scopus.com/inward/record.url?scp=52649089646&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=52649089646&partnerID=8YFLogxK

U2 - 10.1021/cm801192t

DO - 10.1021/cm801192t

M3 - Article

VL - 20

SP - 5628

EP - 5635

JO - Chemistry of Materials

JF - Chemistry of Materials

SN - 0897-4756

IS - 17

ER -