Separation and phase transition investigation of Yb3+/Er3+ co-doped NaYF4 nanoparticles.
Density gradient ultracentrifuge separation was employed to study the phase transition of Yb(3+)/Er(3+) co-doped NaYF4 from α-phase to β-phase. It was found that the cubic α-phased NaYF4 was rich in Y, exhibited predominantly red luminescence, whilst the newly formed hexagonal β-phased NaYF4 had relatively higher Yb and Er atomic ratios, exhibited green luminescence most strongly.
State Key Laboratory of Chemical Resource Engineering, P.O. Box 98, Beijing University of Chemical Technology, Beijing 100029, PR China.
Sha
S
Song
Yun
Y
Kuang
Junfeng
J
Liu
Qing
Q
Yang
Liang
L
Luo
Xiaoming
X
Sun
D002499:Centrifugation, Density Gradient; D004871:Erbium / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D044367:Phase Transition; D013499:Surface Properties; D015018:Ytterbium / Q000737:chemistry*; D015019:Yttrium / Q000737:chemistry*
C525362:sodium yttriumtetrafluoride; D015019:Yttrium; D004871:Erbium; D015018:Ytterbium; D005459:Fluorides