Enhanced NIR-I emission from water-dispersible NIR-II dye-sensitized core/active shell upconverting nanoparticles

2018 ◽  
Vol 6 (17) ◽  
pp. 4777-4785 ◽  
Author(s):  
Chanchal Hazra ◽  
Sajjad Ullah ◽  
York E. Serge Correales ◽  
Laís G. Caetano ◽  
Sidney J. L. Ribeiro
Keyword(s):  
Upconversion Nanoparticles ◽  
Water Dispersible ◽  
Dye Sensitized

Water-dispersible NIR-II dye (IR-1061) sensitized core/active shell upconversion nanoparticles (800 nm emission of Tm3+ ion).

Dye‐Sensitized Core/Shell Upconversion Nanoparticles for Detecting Nitrites in Plant Cells

2019 ◽  
Vol 36 (4) ◽  
pp. 1900014
Author(s):  
Junshan Hu ◽  
Shiping Zhan ◽  
Hao Fu ◽  
Guozheng Nie ◽  
Shigang Hu ◽  
...  
Keyword(s):  
Plant Cells ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Dye Sensitized

Optimizing the Performance of Dye-Sensitized Upconversion Nanoparticles

2021 ◽  
pp. 109428
Author(s):  
Xiaoyu Zhao ◽  
Meifeng Wang ◽  
Zhiwang Cai ◽  
Daoyu Xia ◽  
Lei Zhao ◽  
...  
Keyword(s):  
Upconversion Nanoparticles ◽  
Dye Sensitized

scholarly journals Dye-Sensitized Core/Active Shell Upconversion Nanoparticles for Optogenetics and Bioimaging Applications

ACS Nano ◽  
2016 ◽  
Vol 10 (1) ◽  
pp. 1060-1066 ◽  
Author(s):  
Xiang Wu ◽  
Yuanwei Zhang ◽  
Kendra Takle ◽  
Osman Bilsel ◽  
Zhanjun Li ◽  
...  
Keyword(s):  
Upconversion Nanoparticles ◽  
Dye Sensitized

Dye-Sensitized Lanthanide-Doped Upconversion Nanoparticles for Water Detection in Organic Solvents

2021 ◽  
Author(s):  
Zhongzheng Yu ◽  
Chang-Keun Lim ◽  
Wen Kiat Chan ◽  
Yu Chen ◽  
Wei Shao ◽  
...  
Keyword(s):  
Organic Solvents ◽  
Upconversion Nanoparticles ◽  
Dye Sensitized ◽  
Water Detection

scholarly journals Synthesis, Optical Properties, and Sensing Applications of LaF3:Yb3+/Er3+/Ho3+/Tm3+ Upconversion Nanoparticles

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2477
Author(s):  
Hsiu-Wen Chien ◽  
Chien-Hao Huang ◽  
Chien-Hsin Yang ◽  
Tzong-Liu Wang
Keyword(s):  
Ligand Exchange ◽  
Near Infrared ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Particle Sizes ◽  
X Ray Diffraction ◽  
Water Dispersible ◽  
Sensing Applications ◽  
Transmission Electron ◽  
Doping Ratio

Herein, we successfully synthesized a series of LaF3:Yb3+/Er3+/Ho3+/Tm3+ upconversion nanoparticles (UCNPs) and LaF3:Yb3+0.20, Er3+0.02@LaF3:Yb3+0.20 core/shell UCNPs by modifying the amount of NaOH and the reaction time. Hexagonal LaF3 nanocrystals with uniform particle sizes and bright UC emissions were obtained. The crystal structures of the lanthanide-doped LaF3 UCNPs were investigated using wide-angle X-ray diffraction. The morphologies and particle sizes of the nanocrystals were determined using transmission electron microscopy. The photoluminescence (PL) spectra of the LaF3 nanocrystals could be tuned by altering the doping ratio of Er3+, Ho3+, and Tm3+. In addition, the PL intensities increased after coating the UCNP cores with an active shell. The fluorescence intensities of the UCNPs synthesized via a one-hour reaction with the addition of 2.5 or 5 mmol NaOH increased by up to 17 times compared with the sample prepared without the addition of NaOH. By modifying the doping ratio of Yb/Tm, UV-emissive LaF3 nanocrystals were obtained. After surface modification by ligand exchange, the hydrophobic LaF3:Yb3+0.20, Er3+0.02@LaF3:Yb3+0.20 core/shell UCNPs became water-dispersible. These colloid UCNPs could be utilized as a fluorescent probe for the detection of Hg2+ ions under 980 nm near-infrared irradiation.

Dye-sensitized lanthanide-doped upconversion nanoparticles

2017 ◽  
Vol 46 (14) ◽  
pp. 4150-4167 ◽  
Author(s):  
Xindong Wang ◽  
Rashid R. Valiev ◽  
Tymish Y. Ohulchanskyy ◽  
Hans Ågren ◽  
Chunhui Yang ◽  
...  
Keyword(s):  
Excitation Wavelength ◽  
Upconversion Nanoparticles ◽  
Dye Sensitized ◽  
Optical Upconversion

Dye sensitized lanthanide upconversion entails optical upconversion with unprecedented luminescence brightness and broadband excitation wavelength.

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