Synthesis and up-conversion photoluminescence properties of NaYF 4 :Yb 3+ , Er 3+ @sSiO 2 @mSiO 2 nanoparticles
Liu P.2; Zhou G.2; Chen S.2; Wang S.2
Source PublicationOptical Materials
AbstractNaYF :Yb , Er nanoparticles were synthesized through co-precipitation using EDTA as the chelator. The monodisperse core-shell structure NaYF :Yb , Er @sSiO were synthesized by sol-gel method using TEOS as silica source. The core-shell-shell structure NaYF :Yb , Er @sSiO @mSiO were prepared by coating mesoporous silica shell onto NaYF :Yb , Er @sSiO through hydrolysis of TEOS using CTAB as mesoporous template. Effects of CTAB concentration, TEOS concentration and different addition ways of CTAB were studied. The results show that the NaYF :Yb , Er @sSiO @mSiO nanoparticles with uniform amorphous silica and mesoporous silica shell were successfully synthesized. Up-conversion spectra of these nanoparticles were recorded with 980 nm laser excitation under room temperature. There were no changes of the emission centers of nanoparticles before or after silica coating, but the emission intensities of nanoparticles after silica coating were significantly enhanced. Furthermore, the relative intensity ratio between red emission and green emission was decreased after silica coating. © 2014 Elsevier B.V. All rights reserved.
KeywordCo-precipitation Core-shell structure Mesoporous Up-conversion
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Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
CollectionUniversity of Macau
Affiliation1.University of Chinese Academy of Sciences
2.Shanghai Institute of Ceramics Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu P.,Zhou G.,Chen S.,et al. Synthesis and up-conversion photoluminescence properties of NaYF 4 :Yb 3+ , Er 3+ @sSiO 2 @mSiO 2 nanoparticles[C],2014:1443-1448.
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