PMID- 23295310
OWN - NLM
STAT- MEDLINE
DCOM- 20131021
LR  - 20131121
IS  - 1477-9234 (Electronic)
IS  - 1477-9226 (Linking)
VI  - 42
IP  - 22
DP  - 2013 Jun 14
TI  - Color-tunable and enhanced luminescence of well-defined sodium scandium fluoride 
      nanocrystals.
PG  - 7863-70
LID - 10.1039/c2dt32557h [doi]
AB  - In this paper, well-defined and regular-shaped Na3ScF6 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 Na3ScF6 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 Na3ScF6 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 Na3ScF6 NCs were investigated in detail. 
      Moreover, the UC emission intensities can be significantly improved by coating a 
      layer of Na3ScF6:Yb(3+)/Ln(3+) shell on Na3ScF6:Yb(3+)/Ln(3+) cores with respect 
      to that of pure Na3ScF6: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.
FAU - Fu, Hongbo
AU  - Fu H
AD  - Key Laboratory of Superlight Materials and Surface Technology, Ministry of 
      Education, Harbin Engineering University, Harbin 150001, PR China.
FAU - Yang, Guixin
AU  - Yang G
FAU - Gai, Shili
AU  - Gai S
FAU - Niu, Na
AU  - Niu N
FAU - He, Fei
AU  - He F
FAU - Xu, Jie
AU  - Xu J
FAU - Yang, Piaoping
AU  - Yang P
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Dalton Trans
JT  - Dalton transactions (Cambridge, England : 2003)
JID - 101176026
RN  - 0 (Alkenes)
RN  - 0 (Lanthanoid Series Elements)
RN  - 0 (Luminescent Agents)
RN  - 0 (Solvents)
RN  - 2UMI9U37CP (Oleic Acid)
RN  - 8ZYQ1474W7 (Sodium Fluoride)
RN  - H5ZUQ6V4AK (1-octadecene)
RN  - YUJ4U1EW7R (Scandium)
SB  - IM
MH  - Alkenes/chemistry
MH  - Lanthanoid Series Elements/chemical synthesis/*chemistry
MH  - Luminescence
MH  - Luminescent Agents/chemical synthesis/*chemistry
MH  - Models, Molecular
MH  - Nanoparticles/*chemistry/ultrastructure
MH  - Oleic Acid/chemical synthesis/chemistry
MH  - Phase Transition
MH  - Scandium/*chemistry
MH  - Sodium Fluoride/chemical synthesis/*chemistry
MH  - Solvents
EDAT- 2013/01/09 06:00
MHDA- 2013/10/22 06:00
CRDT- 2013/01/09 06:00
PHST- 2013/01/09 06:00 [entrez]
PHST- 2013/01/09 06:00 [pubmed]
PHST- 2013/10/22 06:00 [medline]
AID - 10.1039/c2dt32557h [doi]
PST - ppublish
SO  - Dalton Trans. 2013 Jun 14;42(22):7863-70. doi: 10.1039/c2dt32557h.