Unravelling the energy transfer of Er3+-self-sensitized upconversion in Er3+–Yb3+–Er3+ clustered core@shell nanoparticles

Nanoscale ◽  
2017 ◽  
Vol 9 (46) ◽  
pp. 18490-18497 ◽  
Author(s):  
Bolong Huang ◽  
Mingzi Sun ◽  
Alan William Dougherty ◽  
Hao Dong ◽  
Yue-Jiao Xu ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

The interplay on enhancing and quenching effects between Er3+ and Yb3+ dopant clusters in self-sensitized core@shell nanoparticles is studied.

scholarly journals Near-infrared upconversion of Nd through Gd-mediated interfacial energy transfer in core-shell nanoparticles

2018 ◽  
Vol 8 (8) ◽  
pp. 2449 ◽  
Author(s):  
Lili Tao ◽  
Xuelong Liu ◽  
Junshan He ◽  
Yajun Lou ◽  
Yonghui Li ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Interfacial Energy ◽  
Near Infrared ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Preparation and Study of Rare Earth Oxide Nanoparticles with Core-Shell Structure

2013 ◽  
Vol 813 ◽  
pp. 332-335
Author(s):  
Mei Gui Ou ◽  
Chun Lin Yang ◽  
Shao Han Cai ◽  
Qi Wei Zhu
Keyword(s):  
Energy Transfer ◽  
Rare Earth ◽  
Precursor Solution ◽  
Rare Earth Oxide ◽  
Oxide Nanoparticles ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
The Core ◽  
Core Shell Structure ◽  
Core Shell Nanoparticles

Core-shell nanoparticles Gd2O3:Tb3+/SiOx were obtained by encapsulating Gd2O3:Tb3+ in a polysiloxane shell. We studied the influence of two kinds of reagents (NaOH and Bu4NOH) reacting with precursor solution on size and luminescent property of nanoparticles. The result showed that the reaction involving NaOH was more favorable to the growth of nanoparticles, thus enhanced the energy transfer between the core and the shell of particles and improved their luminescent intensities.

Tunable color emission based on the activator shell thickness of multilayer core–shell nanoparticles under double NIR excitation

CrystEngComm ◽  
2019 ◽  
Vol 21 (28) ◽  
pp. 4175-4183
Author(s):  
Zhaojing Ba ◽  
Yuansuo Zheng ◽  
Min Hu ◽  
Lei Fu ◽  
Yida He ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Rare Earth ◽  
Transfer Process ◽  
Shell Thickness ◽  
Energy Transfer Process ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Structure ◽  
Core Shell Nanoparticles ◽  
Color Emission

Rare earth luminescent nanomaterials are hot topic due to their unique fluorescence properties. Effective spectral regulation could be achieved by adjusting the coating thickness to affect the energy transfer process in core–shell structure.

Influence of NaOH Quantity upon the Size and Luminescent Property of Core-Shell Gd2O3:Tb3+ /SiOx Nanoparticles

2013 ◽  
Vol 813 ◽  
pp. 323-326
Author(s):  
Mei Gui Ou ◽  
Chun Lin Yang ◽  
Shao Han Cai ◽  
Pascal Perriat
Keyword(s):  
Energy Transfer ◽  
Luminescent Property ◽  
Emission Intensity ◽  
Core Shell ◽  
Mixed Solution ◽  
Shell Nanoparticles ◽  
Polyol Medium ◽  
Size Of Particles ◽  
Core Shell Nanoparticles

Nanostuctured Tb3+-doped Gd203particles were synthesized from chloride precursors GdCl3and TbCl3by NaOH addition in a polyol medium. Then, Gd203: Tb3+particles were encapsulated in a polysioxane shell by being immersed in a mixed solution of APTES and TEOS. Effect of NaOH quantity on size and luminescent property of obtained core-shell nanoparticles was studied. The result shows that the size of nanoparticles increased with the increase of NaOH quantity from 30% to100% of stoichiometry. The emission intensity of core-shell nanoparticles increased with the size of particles due to the enhancement of energy transfer between core and shell.

scholarly journals Enhanced Energy-Transfer Properties in Core-Shell Photoluminescent Nanoparticles Using Mesoporous SiO2 Intermediate Layers

2020 ◽  
Vol 58 (2) ◽  
pp. 137-144
Author(s):  
Woo Hyeong Sim ◽  
Seyun Kim ◽  
Weon Ho Shin ◽  
Hyung Mo Jeong
Keyword(s):  
Optical Properties ◽  
Energy Transfer ◽  
Photoelectron Spectroscopy ◽  
Synthesis Method ◽  
Infrared Light ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
The Core ◽  
Intermediate Layers ◽  
Core Shell Nanoparticles

Multi-layer core-shell nanoparticles (YVO<sub>4</sub>:Nd<sup>3+</sup>/mSiO<sub>2</sub>/SiO<sub>2</sub>) consisting of silica cores (SiO<sub>2</sub>), mesoporous silica (mSiO<sub>2</sub>) intermediate layers, and Neodymium doped rare-earth phosphor (YVO<sub>4</sub>:Nd<sup>3+</sup>) shell layers were successfully synthesized using the stepwise sol-gel method. The morphological structure and optical properties of the functional core-shell nanoparticles were characterized and evaluated by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) analysis. mSiO<sub>2</sub> intermediate layers were utilized as the bridge between the core and shell materials. Their porous surfaces served to anchor the YVO<sub>4</sub>:Nd<sup>3+</sup> crystals. This prevents energy loss during the energy transfer of electrons, resulting in improved optical properties. The use of intermediate layer combinations of mSiO<sub>2</sub>/SiO<sub>2</sub> in the coreshell structure also improved cost-effectiveness, because the core is filled with cheap silica, not expensive phosphors. Even though the nanoparticles used only a thin layer of the photoluminescent shell materials, the optical properties, resulting from the energy-transfer emitting mid-infrared light, were remarkably enhanced by increasing the crystallinity of the phosphor. To demonstrate the practical use of the synthesis method, the photoluminescent properties of the core-shell nanoparticles were optimized by adjusting the annealing temperature and scaling to mass production. We believe that our efficient synthetic strategy provides a facile way of obtaining functional, cost-effective core-shell nanoparticles with improved photoluminescent properties.

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