Crystal phase transition in LixNa1-xGdF4 solid solution nanocrystals - Tuning of optical properties

Handle URI:
http://hdl.handle.net/10754/563258
Title:
Crystal phase transition in LixNa1-xGdF4 solid solution nanocrystals - Tuning of optical properties
Authors:
Bański, Mateusz; Afzaal, Mohammad; Cha, Dong Kyu; Wang, X.; Tan, Hua; Misiewicz, Jan J.; Podhorodecki, Artur P.
Abstract:
The influence of precursor composition on the crystallization of LixNa1-xGdF4 is investigated and discussed. Nanocrystals are prepared from the thermal decomposition of trifluoroacetates in the presence of trioctylphosphine oxide to provide control over particle size. A crystal phase transition from hexagonal to cubic and to tetragonal is observed by increasing lithium trifluoroacetate (Li-TFA) in the solution. Controlling the composition of LixNa1-xGdF4 nanocrystals results in modified crystal field symmetry and emission properties from doped europium (Eu3+) ions. We report that for lithium (Li+) substitution <15%, the hexagonal crystal field is preferred, while the Eu3+ emission is already tuned, whereas at higher Li+ substitution, a phase change takes place and the number of crystalline matrix defects increases which is reflected in the optical properties of Eu3+. From Eu3+ emission properties, the optimum Li+ content is determined to be ∼6.2% in the prepared LixNa1-xGdF4 nanocrystals.
KAUST Department:
Advanced Nanofabrication, Imaging and Characterization Core Lab; Analytical Core Lab; Computational Bioscience Research Center (CBRC)
Publisher:
Royal Society of Chemistry (RSC)
Journal:
J. Mater. Chem. C
Issue Date:
2014
DOI:
10.1039/c4tc01539h
Type:
Article
ISSN:
20507534
Sponsors:
The authors would like to thank the National Centre for Research and Development for their financial support under the LIDER project no. 014/L-2/10. MB would like to acknowledge The Iuventus Plus program (no. IP2011 001271) and Foundation for Polish Science (FNP) "Start" program for the financial support. MA wishes to acknowledge NSTIP strategic technologies program number (12-ENE3204-04) for the financial support.
Appears in Collections:
Articles; Analytical Core Lab; Advanced Nanofabrication, Imaging and Characterization Core Lab; Computational Bioscience Research Center (CBRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorBański, Mateuszen
dc.contributor.authorAfzaal, Mohammaden
dc.contributor.authorCha, Dong Kyuen
dc.contributor.authorWang, X.en
dc.contributor.authorTan, Huaen
dc.contributor.authorMisiewicz, Jan J.en
dc.contributor.authorPodhorodecki, Artur P.en
dc.date.accessioned2015-08-03T11:44:17Zen
dc.date.available2015-08-03T11:44:17Zen
dc.date.issued2014en
dc.identifier.issn20507534en
dc.identifier.doi10.1039/c4tc01539hen
dc.identifier.urihttp://hdl.handle.net/10754/563258en
dc.description.abstractThe influence of precursor composition on the crystallization of LixNa1-xGdF4 is investigated and discussed. Nanocrystals are prepared from the thermal decomposition of trifluoroacetates in the presence of trioctylphosphine oxide to provide control over particle size. A crystal phase transition from hexagonal to cubic and to tetragonal is observed by increasing lithium trifluoroacetate (Li-TFA) in the solution. Controlling the composition of LixNa1-xGdF4 nanocrystals results in modified crystal field symmetry and emission properties from doped europium (Eu3+) ions. We report that for lithium (Li+) substitution <15%, the hexagonal crystal field is preferred, while the Eu3+ emission is already tuned, whereas at higher Li+ substitution, a phase change takes place and the number of crystalline matrix defects increases which is reflected in the optical properties of Eu3+. From Eu3+ emission properties, the optimum Li+ content is determined to be ∼6.2% in the prepared LixNa1-xGdF4 nanocrystals.en
dc.description.sponsorshipThe authors would like to thank the National Centre for Research and Development for their financial support under the LIDER project no. 014/L-2/10. MB would like to acknowledge The Iuventus Plus program (no. IP2011 001271) and Foundation for Polish Science (FNP) "Start" program for the financial support. MA wishes to acknowledge NSTIP strategic technologies program number (12-ENE3204-04) for the financial support.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titleCrystal phase transition in LixNa1-xGdF4 solid solution nanocrystals - Tuning of optical propertiesen
dc.typeArticleen
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Laben
dc.contributor.departmentAnalytical Core Laben
dc.contributor.departmentComputational Bioscience Research Center (CBRC)en
dc.identifier.journalJ. Mater. Chem. Cen
dc.contributor.institutionInstitute of Physics, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27Wroclaw, Polanden
dc.contributor.institutionCenter of Research Excellence in Renewable Energy, King Fahd University of Petroleum and Minerals, PO Box: 1292Dhahran, Saudi Arabiaen
kaust.authorTan, Huaen
kaust.authorCha, Dong Kyuen
kaust.authorWang, X.en
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