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.

Tracking the Motion of Lanthanide Ions within Core–Shell–Shell NaYF4 Nanocrystals via Resonance Energy Transfer

2020 ◽  
Vol 124 (20) ◽  
pp. 11229-11238 ◽  
Author(s):  
Philipp U. Bastian ◽  
Selma Nacak ◽  
Vladimir Roddatis ◽  
Michael U. Kumke
Keyword(s):  
Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Lanthanide Ions ◽  
Core Shell

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.

Upconversion luminescence nanoprobe based on luminescence resonance energy transfer from NaYF4:Yb, Tm to Ag nanodisks

RSC Advances ◽  
2016 ◽  
Vol 6 (95) ◽  
pp. 92428-92433 ◽  
Author(s):  
Boni Si ◽  
Yongbo Wang ◽  
Siwu Lu ◽  
Enzhou Liu ◽  
Xiaoyun Hu ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Upconversion Luminescence ◽  
Resonance Energy Transfer ◽  
Resonance Energy

An upconversion luminescence nanoprobe based on LRET from UCNPs to Ag nanodisks for the detection of biothiols.

scholarly journals Rp-cAMPS Prodrugs Reveal the cAMP Dependence of First-Phase Glucose-Stimulated Insulin Secretion

2015 ◽  
Vol 29 (7) ◽  
pp. 988-1005 ◽  
Author(s):  
Frank Schwede ◽  
Oleg G. Chepurny ◽  
Melanie Kaufholz ◽  
Daniela Bertinetti ◽  
Colin A. Leech ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Insulin Secretion ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Living Cells ◽  
Camp Signaling ◽  
Second Phase ◽  
Rat Islets ◽  
Activation Assay ◽  
Glucose Stimulated Insulin Secretion

Abstract cAMP-elevating agents such as the incretin hormone glucagon-like peptide-1 potentiate glucose-stimulated insulin secretion (GSIS) from pancreatic β-cells. However, a debate has existed since the 1970s concerning whether or not cAMP signaling is essential for glucose alone to stimulate insulin secretion. Here, we report that the first-phase kinetic component of GSIS is cAMP-dependent, as revealed through the use of a novel highly membrane permeable para-acetoxybenzyl (pAB) ester prodrug that is a bioactivatable derivative of the cAMP antagonist adenosine-3′,5′-cyclic monophosphorothioate, Rp-isomer (Rp-cAMPS). In dynamic perifusion assays of human or rat islets, a step-wise increase of glucose concentration leads to biphasic insulin secretion, and under these conditions, 8-bromoadenosine-3′,5′-cyclic monophosphorothioate, Rp-isomer, 4-acetoxybenzyl ester (Rp-8-Br-cAMPS-pAB) inhibits first-phase GSIS by up to 80%. Surprisingly, second-phase GSIS is inhibited to a much smaller extent (≤20%). Using luciferase, fluorescence resonance energy transfer, and bioluminescence resonance energy transfer assays performed in living cells, we validate that Rp-8-Br-cAMPS-pAB does in fact block cAMP-dependent protein kinase activation. Novel effects of Rp-8-Br-cAMPS-pAB to block the activation of cAMP-regulated guanine nucleotide exchange factors (Epac1, Epac2) are also validated using genetically encoded Epac biosensors, and are independently confirmed in an in vitro Rap1 activation assay using Rp-cAMPS and Rp-8-Br-cAMPS. Thus, in addition to revealing the cAMP dependence of first-phase GSIS from human and rat islets, these findings establish a pAB-based chemistry for the synthesis of highly membrane permeable prodrug derivatives of Rp-cAMPS that act with micromolar or even nanomolar potency to inhibit cAMP signaling in living cells.

scholarly journals Correction: 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 (15) ◽  
pp. 5372-5372
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

Correction for ‘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’ by Mengyuan He et al., Analyst, 2020, 145, 4181–4187, DOI: 10.1039/c9an02307k.

An aptamer biosensor for CA125 quantification in human serum based on upconversion luminescence resonance energy transfer

2021 ◽  
Vol 161 ◽  
pp. 105761
Author(s):  
Xiaojing Zhang ◽  
Yanying Wang ◽  
Hongping Deng ◽  
Xiaoxing Xiong ◽  
Huijuan Zhang ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Human Serum ◽  
Upconversion Luminescence ◽  
Resonance Energy Transfer ◽  
Resonance Energy
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