Tuning hexagonal NaYbF4 nanocrystals down to sub-10 nm for enhanced photon upconversion

Nanoscale ◽  
2017 ◽  
Vol 9 (36) ◽  
pp. 13739-13746 ◽  
Author(s):  
Ruikai Shi ◽  
Xincan Ling ◽  
Xiaona Li ◽  
Lu Zhang ◽  
Min Lu ◽  
...  
Keyword(s):  
Upconversion Emission ◽  
Controlled Synthesis ◽  
Upconversion Nanocrystals

Controlled synthesis of sub-10 nm hexagonal NaYbF4 upconversion nanocrystals with enhanced upconversion emission was facilely achieved.

scholarly journals Controlled Synthesis of NaYF4:Yb,Er Upconversion Nanocrystals as Potential Probe for Bioimaging: A Focus on Heat Treatment

2021 ◽  
Author(s):  
Alireza Kavand ◽  
Christophe A. Serra ◽  
Christian Blanck ◽  
Marc Lenertz ◽  
Nicolas Anton ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Controlled Synthesis ◽  
Upconversion Nanocrystals

scholarly journals NaF-mediated controlled-synthesis of multicolor NaxScF3+x:Yb/Er upconversion nanocrystals

Nanoscale ◽  
2015 ◽  
Vol 7 (9) ◽  
pp. 4048-4054 ◽  
Author(s):  
Wen-Bo Pei ◽  
Bo Chen ◽  
Lili Wang ◽  
Jiansheng Wu ◽  
Xue Teng ◽  
...  
Keyword(s):  
Controlled Synthesis ◽  
Upconversion Nanocrystals

Orthorhombic KSc2F7:Yb/Er nanorods: controlled synthesis and strong red upconversion emission

Nanoscale ◽  
2013 ◽  
Vol 5 (23) ◽  
pp. 11928 ◽  
Author(s):  
Yujie Ding ◽  
Xue Teng ◽  
Hao Zhu ◽  
Lili Wang ◽  
Wenbo Pei ◽  
...  
Keyword(s):  
Upconversion Emission ◽  
Controlled Synthesis

Ethylenediaminetetraacetic acid (EDTA)-controlled synthesis of multicolor lanthanide doped BaYF5 upconversion nanocrystals

2011 ◽  
Vol 21 (43) ◽  
pp. 17202 ◽  
Author(s):  
Hailong Qiu ◽  
Guanying Chen ◽  
Liang Sun ◽  
Shuwei Hao ◽  
Gang Han ◽  
...  
Keyword(s):  
Ethylenediaminetetraacetic Acid ◽  
Controlled Synthesis ◽  
Upconversion Nanocrystals

Aspect-Ratio Controlled Synthesis and Tunable Luminescence of YF3:Yb3+/Er3+ Upconversion Nanocrystals

2017 ◽  
Vol 17 (6) ◽  
pp. 3055-3061 ◽  
Author(s):  
G. Murali ◽  
R. K. Mishra ◽  
Jae Myeong Lee ◽  
Young Cheol Chae ◽  
Jongwoo Kim ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Controlled Synthesis ◽  
Upconversion Nanocrystals

scholarly journals Intense Red Upconversion Emission and Shape Controlled Synthesis of Gd2O3:Yb/Er Nanocrystals

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Zhigao Yi ◽  
Boyun Wen ◽  
Chao Qian ◽  
Haibo Wang ◽  
Ling Rao ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Upconversion Luminescence ◽  
Upconversion Emission ◽  
Controlled Synthesis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ph Values ◽  
Transmission Electron ◽  
High Resolution Tem ◽  
Shape Controlled

Yb/Er codoped Gd(OH)3was synthesized firstly via a simple hydrothermal treatment of the corresponding nitrate in the presence of alkali by tuning the pH values. The Gd2O3:Yb/Er nanocrystals were obtained via sintering the corresponding hydroxides precursors. The as-prepared samples were characterized by the typical X-ray diffraction, energy-dispersive X-ray spectroscopy, transmission electron microscopy (TEM), high-resolution TEM, and spectrophotometer. The results revealed that two shapes of the as-prepared Gd2O3:Yb/Er nanocrystals can be readily tuned from lemon-like particle to rod-like structure via tuning pH values from 7 to 14. Moreover, compared with the samples prepared at pH 7, the Gd2O3:Yb/Er nanocrystals prepared at pH 14 exhibit enhanced red upconversion emission and higher upconversion luminescence intensity under the excitation of 980 nm laser.

scholarly journals Dye Sensitization for Ultraviolet Upconversion Enhancement

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3114
Author(s):  
Mingkai Wang ◽  
Hanlin Wei ◽  
Shuai Wang ◽  
Chuanyu Hu ◽  
Qianqian Su
Keyword(s):  
Environmental Science ◽  
Near Infrared ◽  
Underlying Mechanism ◽  
Upconversion Emission ◽  
Excitation Wavelength ◽  
Ultraviolet Emission ◽  
Dye Sensitization ◽  
Photo Catalysis ◽  
Upconversion Nanocrystals ◽  
Ultraviolet Spectral Region

Upconversion nanocrystals that converted near-infrared radiation into emission in the ultraviolet spectral region offer many exciting opportunities for drug release, photocatalysis, photodynamic therapy, and solid-state lasing. However, a key challenge is the development of lanthanide-doped nanocrystals with efficient ultraviolet emission, due to low conversion efficiency. Here, we develop a dye-sensitized, heterogeneous core–multishelled lanthanide nanoparticle for ultraviolet upconversion enhancement. We systematically study the main influencing factors on ultraviolet upconversion emission, including dye concentration, excitation wavelength, and dye-sensitizer distance. Interestingly, our experimental results demonstrate a largely promoted multiphoton upconversion. The underlying mechanism and detailed energy transfer pathway are illustrated. These findings offer insights into future developments of highly ultraviolet-emissive nanohybrids and provide more opportunities for applications in photo-catalysis, biomedicine, and environmental science.

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