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Triple-doped KMnF3:Yb3+/Er3+/Tm3+ nanocubes: four-color upconversion emissions with strong red and near-infrared bands.

Wang H, Hong X, Han R, Shi J, Liu Z, Liu S, Wang Y, Gan Y - Sci Rep (2015)

Bottom Line: It was found that these nanocubes can simultaneously exhibited four-color (blue, green, red and NIR) upconversion emissions under a single 980 nm near-infrared (NIR) laser excitation, which should have potential multicolor in vivo imaging applications.Specifically, the red (660 nm) and NIR (800 nm) peaks, known as two "optical windows" for imaging biological tissues, were strong.The spectral and pump analyses indicated the two-photon processes were responsible for the both red and NIR emissions.

View Article: PubMed Central - PubMed

Affiliation: School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001. P. R. China.

ABSTRACT
Triple-doped (Yb(3+)/Er(3+)/Tm(3+)) KMnF3 nanocubes with uniform sizes of 250 nm were synthesized by a facile hydrothermal route using the oleic acid as the capping agent. It was found that these nanocubes can simultaneously exhibited four-color (blue, green, red and NIR) upconversion emissions under a single 980 nm near-infrared (NIR) laser excitation, which should have potential multicolor in vivo imaging applications. Specifically, the red (660 nm) and NIR (800 nm) peaks, known as two "optical windows" for imaging biological tissues, were strong. The spectral and pump analyses indicated the two-photon processes were responsible for the both red and NIR emissions.

No MeSH data available.


(a) SEM images of the as-synthesized KMnF3:20% Yb3+, 2% Er3+, 2% Tm3+ nanocubes. (b) Size distribution of KMnF3:20% Yb3+, 2% Er3+, 2% Tm3+ nanocubes. (c) XRD patterns of KMnF3:20% Yb3+, 2% Er3+, 2% Tm3+ nanocubes.
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f1: (a) SEM images of the as-synthesized KMnF3:20% Yb3+, 2% Er3+, 2% Tm3+ nanocubes. (b) Size distribution of KMnF3:20% Yb3+, 2% Er3+, 2% Tm3+ nanocubes. (c) XRD patterns of KMnF3:20% Yb3+, 2% Er3+, 2% Tm3+ nanocubes.

Mentions: Figure 1a is a typical SEM image of as-prepared KMnF3:20%Yb3+/2%Er3+/2%Tm3+ UCNPs and Fig. 1b shows the average size distribution of the samples corresponding to those in Fig. 1a. It can be seen that the UCNPs are well dispersed and exhibit uniform nanocube shape with an average size of 250 nm. The crystal structures and the phase purity of the as-prepared tri-doped KMnF3 nanocubes were examined by the X-ray diffraction (XRD) analysis (see Fig. 1c). All peaks are sharp and match well with the standard JCPDS No.17-0116 of KMnF3, indicating high phase purity and crystallinity of obtained samples.


Triple-doped KMnF3:Yb3+/Er3+/Tm3+ nanocubes: four-color upconversion emissions with strong red and near-infrared bands.

Wang H, Hong X, Han R, Shi J, Liu Z, Liu S, Wang Y, Gan Y - Sci Rep (2015)

(a) SEM images of the as-synthesized KMnF3:20% Yb3+, 2% Er3+, 2% Tm3+ nanocubes. (b) Size distribution of KMnF3:20% Yb3+, 2% Er3+, 2% Tm3+ nanocubes. (c) XRD patterns of KMnF3:20% Yb3+, 2% Er3+, 2% Tm3+ nanocubes.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4660594&req=5

f1: (a) SEM images of the as-synthesized KMnF3:20% Yb3+, 2% Er3+, 2% Tm3+ nanocubes. (b) Size distribution of KMnF3:20% Yb3+, 2% Er3+, 2% Tm3+ nanocubes. (c) XRD patterns of KMnF3:20% Yb3+, 2% Er3+, 2% Tm3+ nanocubes.
Mentions: Figure 1a is a typical SEM image of as-prepared KMnF3:20%Yb3+/2%Er3+/2%Tm3+ UCNPs and Fig. 1b shows the average size distribution of the samples corresponding to those in Fig. 1a. It can be seen that the UCNPs are well dispersed and exhibit uniform nanocube shape with an average size of 250 nm. The crystal structures and the phase purity of the as-prepared tri-doped KMnF3 nanocubes were examined by the X-ray diffraction (XRD) analysis (see Fig. 1c). All peaks are sharp and match well with the standard JCPDS No.17-0116 of KMnF3, indicating high phase purity and crystallinity of obtained samples.

Bottom Line: It was found that these nanocubes can simultaneously exhibited four-color (blue, green, red and NIR) upconversion emissions under a single 980 nm near-infrared (NIR) laser excitation, which should have potential multicolor in vivo imaging applications.Specifically, the red (660 nm) and NIR (800 nm) peaks, known as two "optical windows" for imaging biological tissues, were strong.The spectral and pump analyses indicated the two-photon processes were responsible for the both red and NIR emissions.

View Article: PubMed Central - PubMed

Affiliation: School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001. P. R. China.

ABSTRACT
Triple-doped (Yb(3+)/Er(3+)/Tm(3+)) KMnF3 nanocubes with uniform sizes of 250 nm were synthesized by a facile hydrothermal route using the oleic acid as the capping agent. It was found that these nanocubes can simultaneously exhibited four-color (blue, green, red and NIR) upconversion emissions under a single 980 nm near-infrared (NIR) laser excitation, which should have potential multicolor in vivo imaging applications. Specifically, the red (660 nm) and NIR (800 nm) peaks, known as two "optical windows" for imaging biological tissues, were strong. The spectral and pump analyses indicated the two-photon processes were responsible for the both red and NIR emissions.

No MeSH data available.