An active-core/active-shell structure with enhanced quantum-cutting luminescence in Pr–Yb co-doped monodisperse nanoparticles

Nanoscale ◽  
2014 ◽  
Vol 6 (18) ◽  
pp. 10500-10504 ◽  
Author(s):  
Wenjuan Zhu ◽  
Daqin Chen ◽  
Lei Lei ◽  
Ju Xu ◽  
Yuansheng Wang
Keyword(s):  
Shell Structure ◽  
Near Infrared ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Monodisperse Nanoparticles ◽  
Active Core ◽  
Quantum Cutting ◽  
Core Shell Nanoparticles ◽  
Co Doped

Efficient near-infrared quantum-cutting luminescence has been realized in Pr/Yb co-doped monodisperse core–shell nanoparticles and the active-core/active-shell structure leads to a much intensified emission.

Near-infrared photocatalysis based on YF3 : Yb3+,Tm3+/TiO2 core/shell nanoparticles

2010 ◽  
Vol 46 (13) ◽  
pp. 2304 ◽  
Author(s):  
Weiping Qin ◽  
Daisheng Zhang ◽  
Dan Zhao ◽  
Lili Wang ◽  
Kezhi Zheng
Keyword(s):  
Near Infrared ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Lanthanide-doped NaGdF4 core–shell nanoparticles for non-contact self-referencing temperature sensors

Nanoscale ◽  
2014 ◽  
Vol 6 (11) ◽  
pp. 5675-5679 ◽  
Author(s):  
Shuhong Zheng ◽  
Weibo Chen ◽  
Dezhi Tan ◽  
Jiajia Zhou ◽  
Qiangbing Guo ◽  
...  
Keyword(s):  
Near Infrared ◽  
Temperature Sensors ◽  
Infrared Laser ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

A self-referencing nanothermometer is developed based on near infrared laser stimulated visible upconversion from lanthanide-activated core–shell nanoparticles.

Effect of Ytterbium and Erbium co-doped NaYF4@NaSmF4 upconversion core-shell nanoparticles on their luminescence and morphological properties

2019 ◽  
Vol 6 (10) ◽  
pp. 104004
Author(s):  
Preethi Selvamuthu ◽  
Jaison Darson ◽  
Chandrasekar Ponnusamy ◽  
Gopalakrishnan Chandrasekar ◽  
Sivakumar Muthusamy ◽  
...  
Keyword(s):  
Morphological Properties ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles ◽  
Co Doped

PREPARATION AND CHARACTERIZATION OF SURFACE-FUNCTIONALIZATION OF SILICA-COATED MAGNETITE NANOPARTICLES FOR DRUG DELIVERY

NANO ◽  
2014 ◽  
Vol 09 (04) ◽  
pp. 1450042 ◽  
Author(s):  
CONG-WANG ZHANG ◽  
CHANG-CHUN ZENG ◽  
YING XU
Keyword(s):  
Drug Delivery ◽  
Shell Structure ◽  
Drug Carrier ◽  
Point Of View ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
The Core ◽  
Application Potential ◽  
Core Shell Structure ◽  
Core Shell Nanoparticles

Fe 3 O 4– SiO 2 core–shell structure nanoparticles containing magnetic properties were investigated for their potential use in drug delivery. The Fe 3 O 4– SiO 2 core–shell structure nanoparticles were successfully synthesized by a simple and convenient way. The Fe 3 O 4– SiO 2 nanoparticles showed superparamagnetic behavior, indicating a great application potential in separation technologies. From the application point of view, the prepared nanoparticles were found to act as an efficient drug carrier. Specifically, the surface of the core–shell nanoparticles was modified with amino groups by use of silane coupling agent 3-aminopropyltriethoxysilane (APTS). Doxorubicin (DOX) was successfully grafted to the surface of the core–shell nanoparticles after the decoration with the carboxyl acid groups on the surface of amino-modified core–shell structure nanoparticles. Moreover, the nanocomposite showed a good drug delivery performance in the DOX-loading efficiency and drug release experiments, confirming that the materials had a great application potential in drug delivery. It is envisioned that the prepared materials are the ideal agent for application in medical diagnosis and therapy.

scholarly journals Bifunctional Tm3+,Yb3+:GdVO4@SiO2 Core-Shell Nanoparticles in HeLa Cells: Upconversion Luminescence Nanothermometry in the First Biological Window and Biolabelling in the Visible

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 993 ◽  
Author(s):  
Oleksandr Savchuk ◽  
Joan Josep Carvajal Marti ◽  
Concepción Cascales ◽  
Patricia Haro-Gonzalez ◽  
Francisco Sanz-Rodríguez ◽  
...  
Keyword(s):  
Hela Cells ◽  
Near Infrared ◽  
Energy Levels ◽  
Upconversion Luminescence ◽  
Biological Tissues ◽  
Visible Range ◽  
Core Shell ◽  
Fluorescence Intensity Ratio ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

The bifunctional possibilities of Tm,Yb:GdVO4@SiO2 core-shell nanoparticles for temperature sensing by using the near-infrared (NIR)-excited upconversion emissions in the first biological window, and biolabeling through the visible emissions they generate, were investigated. The two emission lines located at 700 and 800 nm, that arise from the thermally coupled 3F2,3 and 3H4 energy levels of Tm3+, were used to develop a luminescent thermometer, operating through the Fluorescence Intensity Ratio (FIR) technique, with a very high thermal relative sensitivity. Moreover, since the inert shell surrounding the luminescent active core allows for dispersal of the nanoparticles in water and biological compatible fluids, we investigated the penetration depth that can be realized in biological tissues with their emissions in the NIR range, achieving a value of 0.8 mm when excited at powers of 50 mW. After their internalization in HeLa cells, a low toxicity was observed and the potentiality for biolabelling in the visible range was demonstrated, which facilitated the identification of the location of the nanoparticles inside the cells, and the temperature determination.

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
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