Achievement of broadband near-infrared phosphor Ca3Y2Ge3O12:Cr3+, Ce3+ via energy transfer for food analysis

2021 ◽  
pp. 118170
Author(s):  
Jia Cui ◽  
Panlai Li ◽  
Lingwei Cao ◽  
Xuejiao Wang ◽  
Yao Yao ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Food Analysis ◽  
Near Infrared

Near-infrared photon-excited energy transfer in platinum(ii)-based supramolecular polymers assisted by upconverting nanoparticles

2021 ◽  
Vol 57 (15) ◽  
pp. 1927-1930
Author(s):  
Zhao Gao ◽  
Lulu Shi ◽  
Xiao Ling ◽  
Ze Chen ◽  
Qingsong Mei ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Near Infrared ◽  
Supramolecular Polymers ◽  
Upconversion Nanoparticles ◽  
Supramolecular System ◽  
Infrared Photon

A hybrid supramolecular system with near-infrared photon-excited energy transfer has been successfully constructed, relying on the assistance of upconversion nanoparticles in platinum(ii)-based supramolecular polymers.

scholarly journals Upconversion Luminescence of Silica–Calcia Nanoparticles Co-doped with Tm3+ and Yb3+ Ions

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 937
Author(s):  
Katarzyna Halubek-Gluchowska ◽  
Damian Szymański ◽  
Thi Ngoc Lam Tran ◽  
Maurizio Ferrari ◽  
Anna Lukowiak
Keyword(s):  
Energy Transfer ◽  
Near Infrared ◽  
Upconversion Luminescence ◽  
Sol Gel ◽  
Emission Spectra ◽  
Transmission Electron ◽  
Characteristic Emission ◽  
Diffraction Patterns ◽  
Size Of Particles ◽  
Average Size

Looking for upconverting biocompatible nanoparticles, we have prepared by the sol–gel method, silica–calcia glass nanopowders doped with different concentration of Tm3+ and Yb3+ ions (Tm3+ from 0.15 mol% up to 0.5 mol% and Yb3+ from 1 mol% up to 4 mol%) and characterized their structure, morphology, and optical properties. X-ray diffraction patterns indicated an amorphous phase of the silica-based glass with partial crystallization of samples with a higher content of lanthanides ions. Transmission electron microscopy images showed that the average size of particles decreased with increasing lanthanides content. The upconversion (UC) emission spectra and fluorescence lifetimes were registered under near infrared excitation (980 nm) at room temperature to study the energy transfer between Yb3+ and Tm3+ at various active ions concentrations. Characteristic emission bands of Tm3+ ions in the range of 350 nm to 850 nm were observed. To understand the mechanism of Yb3+–Tm3+ UC energy transfer in the SiO2–CaO powders, the kinetics of luminescence decays were studied.

Near infrared fluorescence and energy transfer in Ce/Nd Co-doped CaxSr1−xS

2011 ◽  
Vol 131 (1) ◽  
pp. 134-137 ◽  
Author(s):  
Jian-Xin Meng ◽  
Wen-Jiao Wan ◽  
Li-Li Fan ◽  
Chuang-Tao Yang ◽  
Qing-Qing Chen ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Near Infrared ◽  
Near Infrared Fluorescence ◽  
Co Doped

Sensitizing effect of Yb3+ on near-infrared fluorescence emission of Cr4+-doped calcium aluminate glasses

2000 ◽  
Vol 15 (2) ◽  
pp. 278-281 ◽  
Author(s):  
Yong Gyu Choi ◽  
Kyong Hon Kim ◽  
Yong Seop Han ◽  
Jong Heo
Keyword(s):  
Energy Transfer ◽  
Calcium Aluminate ◽  
Near Infrared ◽  
Fluorescence Emission ◽  
Dipole Interaction ◽  
Energy Transfer Mechanism ◽  
Efficient Energy Transfer ◽  
Efficient Energy ◽  
Sensitizing Effect ◽  
Decay Behavior

We have demonstrated that an efficient energy transfer takes place from Yb3+ to Cr4+ in calcium aluminate glasses. Yb3+ improves excitation efficiency at around 980 nm, enhancing emission intensity of Cr4+ fluorescence at 1.2–1.6 μm. Nonradiative energy transfer via electric dipole–dipole interaction between ytterbium and chromium ions was found to be dominant over radiative Yb3+ → Cr4+ energy transfer. A diffusionlimited energy transfer mechanism well explains the decay behavior of Yb3+/Cr4+- codoped glasses. This codoping scheme may be applicable to other Cr4+-containing crystals and glasses.

CaMoO4:x%Yb3+: A Novel Near-Infrared Quantum-Cutting Phosphors via Cooperative Energy Transfer

2011 ◽  
Vol 11 (11) ◽  
pp. 9543-9549 ◽  
Author(s):  
Xueqin Cao ◽  
Li Li ◽  
Xiantao Wei ◽  
Yonghu Chen ◽  
Weiping Zhang ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Near Infrared ◽  
Quantum Cutting ◽  
Cooperative Energy

scholarly journals Enhanced visible and near infrared emissions via Ce3+to Ln3+energy transfer in Ln3+-doped CeF3nanocrystals (Ln = Nd and Sm)

2016 ◽  
Vol 45 (1) ◽  
pp. 78-84 ◽  
Author(s):  
Tuhin Samanta ◽  
Shyam Sarkar ◽  
Venkata. N. K. B. Adusumalli ◽  
Athma E. Praveen ◽  
Venkataramanan Mahalingam
Keyword(s):  
Energy Transfer ◽  
Near Infrared ◽  
Colloidal Nanocrystals ◽  
Infrared Emissions ◽  
First Time

We report the enhancement of both visible and near infrared (NIR) emissions from Nd3+ionsviaCe3+sensitization in colloidal nanocrystals for the first time.

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