Sub-10 nm and monodisperse β-NaYF4:Yb,Tm,Gd nanocrystals with intense ultraviolet upconversion luminescence

2014 ◽  
Vol 2 (12) ◽  
pp. 2198-2203 ◽  
Author(s):  
Feng Shi ◽  
Yue Zhao
Keyword(s):  
Upconversion Luminescence ◽  
High Order ◽  
Core Shell ◽  
Upconversion Nanocrystals

Lanthanide-doped upconversion nanocrystals of β-NaYF4:18%Yb,0.5%Tm,X%Gd and core–shell structured β-NaYF4:18%Yb,0.5%Tm,20%Gd@NaGdF4 as small as 8 nm and 12 nm in diameter respectively were synthesized. They display intense and high-order ultraviolet (UV) emissions upon 980 nm excitation.

Optical Temperature Sensing of Core-Shell Structured NaYF4:Yb3+, Er3+@NaYF4 Nanocrystals with Different Shell Thickness

2015 ◽  
Vol 738-739 ◽  
pp. 27-30
Author(s):  
Dong Dong Li ◽  
Qi Yue Shao ◽  
Yan Dong ◽  
Jian Qing Jiang
Keyword(s):  
Shell Thickness ◽  
Thermal Sensitivity ◽  
Upconversion Luminescence ◽  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Sensing Properties ◽  
The Core ◽  
Β Phase ◽  
Biomedical Fields

Hexagonal (β)-phase NaYF4:Yb3+, Er3+ upconversion nanoparticles (UCNPs) with and without an inert (undoped NaYF4) shell have been successfully synthesized and the effects of shell thickness on the upconversion luminescence (UCL) and temperature sensing properties were systematically investigated. It was found that the NaYF4 shell and its thickness do not affect the RHS values and thermal sensitivity, but can obviously improve the UCL intensity of NaYF4:Yb3+, Er3+ UCNPs. It implies that the core-shell structured NaYF4:Yb3+, Er3+@NaYF4 UCNPs with excellent UCL properties have great potential to be used as temperature sensing probes in biomedical fields, without considering the influences of the shell thickness on their temperature sensing properties.

Plasmonic Dual‐Enhancement and Precise Color Tuning of Gold Nanorod@SiO 2 Coupled Core–Shell–Shell Upconversion Nanocrystals

2017 ◽  
Vol 27 (36) ◽  
pp. 1701842 ◽  
Author(s):  
Fengwen Kang ◽  
Jijun He ◽  
Tianying Sun ◽  
Zhi Yong Bao ◽  
Feng Wang ◽  
...  
Keyword(s):  
Gold Nanorod ◽  
Core Shell ◽  
Color Tuning ◽  
Upconversion Nanocrystals

Enhancing Upconversion Luminescence of LiYF4:Yb,Er Nanocrystals by Cd2+ Doping and Core–Shell Structure

2017 ◽  
Vol 121 (34) ◽  
pp. 18909-18916 ◽  
Author(s):  
Yiru Zhu ◽  
Shuwen Zhao ◽  
Bin Zhou ◽  
Hao Zhu ◽  
Youfa Wang
Keyword(s):  
Shell Structure ◽  
Upconversion Luminescence ◽  
Core Shell ◽  
Core Shell Structure

Nd3+-Sensitized Ho3+ Single-Band Red Upconversion Luminescence in Core–Shell Nanoarchitecture

2015 ◽  
Vol 6 (14) ◽  
pp. 2833-2840 ◽  
Author(s):  
Daqin Chen ◽  
Lu Liu ◽  
Ping Huang ◽  
Mingye Ding ◽  
Jiasong Zhong ◽  
...  
Keyword(s):  
Upconversion Luminescence ◽  
Single Band ◽  
Core Shell

Huge enhancement of upconversion luminescence by broadband dye sensitization of core/shell nanocrystals

2016 ◽  
Vol 45 (34) ◽  
pp. 13392-13398 ◽  
Author(s):  
Dongguang Yin ◽  
Yumin Liu ◽  
Jingxiu Tang ◽  
Feifei Zhao ◽  
Zhiwen Chen ◽  
...  
Keyword(s):  
Upconversion Luminescence ◽  
Core Shell ◽  
Dye Sensitization ◽  
Dye Sensitized

The UCL intensity of dye-sensitized UCNCs excited at 820 nm is 800-folds higher than that of pure UCNCs excited at 980 nm.

One-pot synthesis of ultrasmall β-NaGdF4 nanoparticles with enhanced upconversion luminescence

2019 ◽  
Vol 7 (29) ◽  
pp. 8898-8904 ◽  
Author(s):  
Chunyan Cheng ◽  
Yueshan Xu ◽  
Songtao Liu ◽  
Yuanyuan Liu ◽  
Xian Wang ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Upconversion Luminescence ◽  
Core Shell ◽  
High Quantum Yield ◽  
High Quality ◽  
Shell Nanoparticles ◽  
One Pot ◽  
High Quantum ◽  
One Pot Synthesis ◽  
Core Shell Nanoparticles

High quality β-NaGdYF4:Yb/Er and high quantum yield β-NaGdF4:Yb/Er@β-NaYF4 core shell nanoparticles were synthesized.

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