NDLI: Color-tunable and enhanced luminescence of well-defined sodium scandium fluoride nanocrystals

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Yang, Guixin Xu, Jie Fu, Hongbo Yang, Piaoping Gai, Shili Niu, Na He, Fei
Description	Author Affiliation: Fu H ( Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, PR China.)
Abstract	In this paper, well-defined and regular-shaped $Na_{3}ScF_{6}$ nanocrystals (NCs) have been synthesized in high boiling organic solvents 1-octadecene (ODE) and oleic acid (OA), via the thermal decomposition of rare-earth oleate precursors. It is found that highly uniform monoclinic $Na_{3}ScF_{6}$ NCs with narrow size distribution have been obtained, which can easily be dispersed in cyclohexane solvent to form transparent colloid solutions. Upon 980 laser diode ( LD ) excitation, the relative up-conversion (UC) emission intensities of different colors in $Yb^{3+}/Er^{3+},$ $Yb^{3+}/Tm^{3+}$ and $Yb^{3+}/Ho^{3+}$ doped $Na_{3}ScF_{6}$ can be tuned by altering the $Yb^{3+}$ doping concentration, resulting in the tunable multicolor in a wide range. On the basis of the emission spectra and the plot of luminescence intensity to pump power, the UC mechanisms of the co-doped $Na_{3}ScF_{6}$ NCs were investigated in detail. Moreover, the UC emission intensities can be significantly improved by coating a layer of $Na_{3}ScF_{6}:Yb^{3+}/Ln^{3+}$ shell on $Na_{3}ScF_{6}:Yb^{3+}/Ln^{3+}$ cores with respect to that of pure $Na_{3}ScF_{6}:Yb^{3+}/Ln^{3+}$ core NCs. Furthermore, transparent and UC luminescent NCs/polydimethylsiloxane (PDMS) composites with regular dimensions were also fabricated by an in situ polymerization route. Uniform NCs with a wide variation of luminescence colors will show potential applications in diverse fields.
ISSN	14779226
Issue Number	22
Volume Number	42
e-ISSN	13645447
Journal	Dalton Trans.
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2013-06-14
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Lanthanoid Series Elements Chemistry Luminescent Agents Nanoparticles Scandium Sodium Fluoride Alkenes Chemical Synthesis Luminescence Models, Molecular Ultrastructure Oleic Acid Phase Transition Solvents Journal Article Research Support, Non-U.S. Gov't
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in