Continuous Flow Supercritical Water Synthesis and Temperature-Dependent Defect Structure Analysis of YAG and YbAG Nanoparticles

Peter Nørby; Kirsten Marie Ørnsbjerg Jensen; Nina Lock; Mogens Christensen; Bo Brummerstedt Iversen

doi:10.1021/acs.cgd.5b01761

Continuous Flow Supercritical Water Synthesis and Temperature-Dependent Defect Structure Analysis of YAG and YbAG Nanoparticles

Peter Nørby, Kirsten Marie Ørnsbjerg Jensen, Nina Lock, Mogens Christensen, Bo Brummerstedt Iversen

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

10 Citations (Scopus)

Abstract

Yttrium and ytterbium aluminum garnet (Y ₃Al ₅O ₁₂ and Yb ₃Al ₅O ₁₂) nanoparticles have been synthesized under sub- and supercritical water conditions in a continuous flow reactor. The particle size has been investigated by scanning and transmission electron microscopy. The heat-induced structural changes of the garnet structure have been investigated by multitemperature powder X-ray diffraction at a synchrotron source (100-1000 K). In combination, Rietveld refinement of these multitemperature data and thermal analysis indicate a proposed diffusion mechanism for the aluminum and yttrium/ytterbium atoms in the garnet structure, which leads to fewer defects at higher temperature. Hence, hydrothermally synthesized nanoparticles give novel knowledge about the disordered internal structure important for their use in optical applications.

Original language	English
Journal	Crystal Growth & Design
Volume	16
Issue	5
Pages (from-to)	2646-2652
Number of pages	7
ISSN	1528-7483
DOIs	https://doi.org/10.1021/acs.cgd.5b01761
Publication status	Published - 2016

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10.1021/acs.cgd.5b01761

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title = "Continuous Flow Supercritical Water Synthesis and Temperature-Dependent Defect Structure Analysis of YAG and YbAG Nanoparticles",

abstract = "Yttrium and ytterbium aluminum garnet (Y 3Al 5O 12 and Yb 3Al 5O 12) nanoparticles have been synthesized under sub- and supercritical water conditions in a continuous flow reactor. The particle size has been investigated by scanning and transmission electron microscopy. The heat-induced structural changes of the garnet structure have been investigated by multitemperature powder X-ray diffraction at a synchrotron source (100-1000 K). In combination, Rietveld refinement of these multitemperature data and thermal analysis indicate a proposed diffusion mechanism for the aluminum and yttrium/ytterbium atoms in the garnet structure, which leads to fewer defects at higher temperature. Hence, hydrothermally synthesized nanoparticles give novel knowledge about the disordered internal structure important for their use in optical applications.",

author = "Peter N{\o}rby and Jensen, {Kirsten Marie {\O}rnsbjerg} and Nina Lock and Mogens Christensen and Iversen, {Bo Brummerstedt}",

year = "2016",

doi = "10.1021/acs.cgd.5b01761",

language = "English",

volume = "16",

pages = "2646--2652",

journal = "Crystal Growth & Design",

issn = "1528-7483",

publisher = "American Chemical Society",

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}

Continuous Flow Supercritical Water Synthesis and Temperature-Dependent Defect Structure Analysis of YAG and YbAG Nanoparticles. / Nørby, Peter; Jensen, Kirsten Marie Ørnsbjerg; Lock, Nina et al.
In: Crystal Growth & Design, Vol. 16, No. 5, 2016, p. 2646-2652.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - Continuous Flow Supercritical Water Synthesis and Temperature-Dependent Defect Structure Analysis of YAG and YbAG Nanoparticles

AU - Nørby, Peter

AU - Jensen, Kirsten Marie Ørnsbjerg

AU - Lock, Nina

AU - Christensen, Mogens

AU - Iversen, Bo Brummerstedt

PY - 2016

Y1 - 2016

N2 - Yttrium and ytterbium aluminum garnet (Y 3Al 5O 12 and Yb 3Al 5O 12) nanoparticles have been synthesized under sub- and supercritical water conditions in a continuous flow reactor. The particle size has been investigated by scanning and transmission electron microscopy. The heat-induced structural changes of the garnet structure have been investigated by multitemperature powder X-ray diffraction at a synchrotron source (100-1000 K). In combination, Rietveld refinement of these multitemperature data and thermal analysis indicate a proposed diffusion mechanism for the aluminum and yttrium/ytterbium atoms in the garnet structure, which leads to fewer defects at higher temperature. Hence, hydrothermally synthesized nanoparticles give novel knowledge about the disordered internal structure important for their use in optical applications.

AB - Yttrium and ytterbium aluminum garnet (Y 3Al 5O 12 and Yb 3Al 5O 12) nanoparticles have been synthesized under sub- and supercritical water conditions in a continuous flow reactor. The particle size has been investigated by scanning and transmission electron microscopy. The heat-induced structural changes of the garnet structure have been investigated by multitemperature powder X-ray diffraction at a synchrotron source (100-1000 K). In combination, Rietveld refinement of these multitemperature data and thermal analysis indicate a proposed diffusion mechanism for the aluminum and yttrium/ytterbium atoms in the garnet structure, which leads to fewer defects at higher temperature. Hence, hydrothermally synthesized nanoparticles give novel knowledge about the disordered internal structure important for their use in optical applications.

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U2 - 10.1021/acs.cgd.5b01761

DO - 10.1021/acs.cgd.5b01761

M3 - Journal article

SN - 1528-7483

VL - 16

SP - 2646

EP - 2652

JO - Crystal Growth & Design

JF - Crystal Growth & Design

IS - 5

ER -

Continuous Flow Supercritical Water Synthesis and Temperature-Dependent Defect Structure Analysis of YAG and YbAG Nanoparticles

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