scholarly journals Upconversion Luminescence and Magnetic Turning of NaLuF4:Yb3+/Tm3+/Gd3+ Nanoparticles and Their Application for Detecting Acriflavine

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Shigang Hu ◽  
Huiyi Cao ◽  
Xiaofeng Wu ◽  
Shiping Zhan ◽  
Qingyang Wu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Integral Intensity ◽  
Upconversion Luminescence ◽  
Resonance Energy Transfer ◽  
Blue Emission ◽  
Resonance Energy ◽  
Green Emission ◽  
Luminescent Properties ◽  
Fluorescent Nanoprobe ◽  
Integral Intensity Ratio

Fluorescent and magnetic bifunctional NaLuF4:Yb3+/Tm3+/Gd3+ nanocrystals were synthesized by the solvothermal method and subsequent surface modification. By changing the doping concentration of Gd3+, the shape, size, luminescent properties, and magnetic properties of the nanoparticles can be modulated. These NaLuF4:Yb3+/Tm3+/Gd3+ nanocrystals present efficient blue upconversion fluorescence and excellent paramagnetic property at room temperature. Based on the luminescence resonance energy transfer (LRET), upconversion nanoparticles (UCNPs) were confirmed to be an efficient fluorescent nanoprobe for detecting acriflavine. It is easy to derive the concentration of acriflavine from the Integral Intensity Ratio of Green (emission from acriflavine) to Blue (emission from UCNPs) fluorescent signals. Based on this upconversion fluorescent nanoprobe, the detection limit of acriflavine can reach up to 0.32 μg/mL.

Synthesis and Luminescence Properties of Lanthanide (III)-Doped YF3 Nanoparticles

2006 ◽  
Vol 6 (3) ◽  
pp. 830-836 ◽  
Author(s):  
Yang Cui ◽  
Xianping Fan ◽  
Zhanglian Hong ◽  
Minquan Wang
Keyword(s):  
Upconversion Luminescence ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Lanthanide Ions ◽  
Luminescence Properties ◽  
Synthesis Process ◽  
Second Phase ◽  
Trivalent Lanthanide ◽  
Xrd Patterns ◽  
Luminescence Concentration Quenching

Synthesis process and luminescence properties of trivalent lanthanide ions (Ln3+) doped YF3 nanoparticles have been investigated. To synthesis Ln3+-doped YF3 nanoparticles, the mixture of (YCl3·nH2O + LnCl3·nH2O), and NH4F was hydrothermal treated at 180 °C in a Teflon-liner auto-clave or heated at higher temperatures (400 °C ∼ 600 °C) in a stove. The XRD patterns showed that the Ln3+-doped orthorhombic YF3 nanoparticles with no second phase have been prepared. The solid solution Y1−xEuxF3 (x = 0 ∼ 0.4) nanoparticles have been synthesized. The luminescence concentration quenching resulted from resonance energy transfer between neighboring Eu3+ ions occurred at higher Eu3+ concentrations (30 mol%). The upconversion luminescence of Er3+−Yb3+ codoped YF3 nanoparticles under 980 nm excitation has also been observed. With increase of heated temperature, the size of the Er3+−Yb3+ codoped YF3 nanoparticles increased gradually, and upconversion luminescence intensity increased significantly.

A paper-supported sandwich immunosensor based on upconversion luminescence resonance energy transfer for the visual and quantitative determination of a cancer biomarker in human serum

The Analyst ◽  
2020 ◽  
Vol 145 (12) ◽  
pp. 4181-4187 ◽  
Author(s):  
Mengyuan He ◽  
Ning Shang ◽  
Lin Shen ◽  
Zhihong Liu
Keyword(s):  
Energy Transfer ◽  
Quantitative Determination ◽  
Human Serum ◽  
Upconversion Luminescence ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Cancer Biomarker

A portable and sensitive paper-supported sandwich immunosensor based on UC-FRET was developed for the visual and quantitative determination of CEA.

Influence of Sensitizer Concentration on the Upconversion Luminescence of NaYF4: Yb3+, Er3+ Nanoparticles

2012 ◽  
Vol 510 ◽  
pp. 609-613 ◽  
Author(s):  
Jun Wei Zhao ◽  
Dong Mei Shi ◽  
Ying Gang Zhao ◽  
Xiang Gui Kong
Keyword(s):  
Room Temperature ◽  
Doping Concentration ◽  
Sodium Citrate ◽  
Upconversion Luminescence ◽  
Green Emission ◽  
Cross Relaxation ◽  
The Cross ◽  
Hydrothermal Methods ◽  
Sensitization Effect

A series of NaYF4: Yb3+, Er3+ nanoparticles with different doping concentration were successfully prepared by the combination of coprecipitation and hydrothermal methods using sodium citrate as chelator. Upconversion luminescence can be observed in all of the samples at room temperature. Fixed the Er3+ concentration with 1 mol% unchanged, the effect of the Yb3+ concentration on the upconversion luminescence of NaYF4: Yb3+, Er3+ samples were studied when the doped Yb3+ concentrations were 0 mol%, 1 mol%, 2 mol%, 5 mol%, 10 mol% and 20 mol%, respectively. As increasing the Yb3+ concentration, the total intensity of the upconversion luminescence of the samples is increasing while the ratio of red to green emission increases firstly and then decreases. The maximum ratio value is 22.1 when the Yb3+ concentration is 10 mol%. It is found that the cross relaxation and cooperative sensitization effect are the reasons for the phenomenon above.

scholarly journals What type of nanoscopic environment does a cationic fluorophore experience in room temperature ionic liquids?

2015 ◽  
Vol 17 (25) ◽  
pp. 16587-16593 ◽  
Author(s):  
Anup Ghosh ◽  
Chayan K. De ◽  
Tanmay Chatterjee ◽  
Prasun K. Mandal
Keyword(s):  
Energy Transfer ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Rhodamine 6G ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Room Temperature Ionic Liquids ◽  
Cationic Dye

Employing spectral and dynamical resonance energy transfer technique nanoscopic environment experienced by a cationic dye (rhodamine 6G) in room temperature ionic liquids could be revealed.

Excitonic enhancement of colour emission and Förster resonance energy transfer in chemically synthesized Mn-doped ZnS nanomaterials

2020 ◽  
Vol 49 (46) ◽  
pp. 16979-16992
Author(s):  
Lakshmi Kumari ◽  
Asit Kumar Kar
Keyword(s):  
Energy Transfer ◽  
Resonance Energy Transfer ◽  
Blue Emission ◽  
Resonance Energy ◽  
Forster Resonance Energy Transfer ◽  
Förster Resonance Energy Transfer ◽  
Orange Emission ◽  
Mn Doped ◽  
Förster Resonance

Excitons are created in Zn1−xMnxS under photo-excitation. A fraction of the excitons transfers their energy to ZnS's intrinsic traps, generating blue emission, whereas the remaining excitons are utilized to excite Mn2+ ions, showing orange emission.

Room‐Temperature Phosphorescence Resonance Energy Transfer for Construction of Near‐Infrared Afterglow Imaging Agents

2020 ◽  
Vol 32 (52) ◽  
pp. 2006752
Author(s):  
Qianxi Dang ◽  
Yuyan Jiang ◽  
Jinfeng Wang ◽  
Jiaqiang Wang ◽  
Qunhua Zhang ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Room Temperature ◽  
Near Infrared ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Imaging Agents ◽  
Room Temperature Phosphorescence
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