Quenching effect of co-dopant Pr3+ on red emitting yttrium vanadate phosphor doped with Eu(III)

2020 ◽  
Author(s):  
G. Neeraja Rani ◽  
J. Shankar ◽  
P. Raju ◽  
J. Anjaiah ◽  
B. Mamatha ◽  
...  
Keyword(s):  
Yttrium Vanadate ◽  
Quenching Effect

Molecular docking, quorum quenching effect, antibiofilm activity and safety profile of silver-complexed sulfonamide on Pseudomonas aeruginosa

Biofouling ◽  
2021 ◽  
pp. 1-17
Author(s):  
Fallon dos Santos Siqueira ◽  
Camilla Filippi dos Santos Alves ◽  
Alencar Kolinski Machado ◽  
Josiéli Demétrio Siqueira ◽  
Thiago dos Santos ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Molecular Docking ◽  
Safety Profile ◽  
Quorum Quenching ◽  
Antibiofilm Activity ◽  
Quenching Effect

scholarly journals Ratiometric Fluorescent Biosensors for Glucose and Lactate Using an Oxygen-Sensing Membrane

Biosensors ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 208
Author(s):  
Hong Dinh Duong ◽  
Jong Il Rhee
Keyword(s):  
Limit Of Detection ◽  
Oxygen Sensing ◽  
High Sensitivity ◽  
Glucose Sensing ◽  
Oxidation Reactions ◽  
Lactate Oxidase ◽  
Lactate Oxidation ◽  
Detection Range ◽  
Quenching Effect ◽  
Sensing Membrane

In this study, ratiometric fluorescent glucose and lactate biosensors were developed using a ratiometric fluorescent oxygen-sensing membrane immobilized with glucose oxidase (GOD) or lactate oxidase (LOX). Herein, the ratiometric fluorescent oxygen-sensing membrane was fabricated with the ratio of two emission wavelengths of platinum meso-tetra (pentafluorophenyl) porphyrin (PtP) doped in polystyrene particles and coumarin 6 (C6) captured into silica particles. The operation mechanism of the sensing membranes was based on (i) the fluorescence quenching effect of the PtP dye by oxygen molecules, and (ii) the consumption of oxygen levels in the glucose or lactate oxidation reactions under the catalysis of GOD or LOX. The ratiometric fluorescent glucose-sensing membrane showed high sensitivity to glucose in the range of 0.1–2 mM, with a limit of detection (LOD) of 0.031 mM, whereas the ratiometric fluorescent lactate-sensing membrane showed the linear detection range of 0.1–0.8 mM, with an LOD of 0.06 mM. These sensing membranes also showed good selectivity, fast reversibility, and stability over long-term use. They were applied to detect glucose and lactate in artificial human serum, and they provided reliable measurement results.

A selective proton transfer optical sensor for copper II based on chelation enhancement quenching effect (CHEQ)

2020 ◽  
Vol 181 ◽  
pp. 108566
Author(s):  
Luís Gustavo Teixeira Alves Duarte ◽  
Felipe Lange Coelho ◽  
José Carlos Germino ◽  
Gabriela Gamino da Costa ◽  
Jônatas Faleiro Berbigier ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Optical Sensor ◽  
Quenching Effect

Modeling of thermoluminescence in SrY2O4:Eu3+and their concentration quenching effect

Optik ◽  
2021 ◽  
Vol 232 ◽  
pp. 166607
Author(s):  
Amirouche Bouremani ◽  
Dahane Kadri ◽  
Ahmed Kadari ◽  
Vikas Dubey
Keyword(s):  
Concentration Quenching ◽  
Quenching Effect ◽  
Concentration Quenching Effect

Different Quenching Effect of Intramolecular Rotation on the Singlet and Triplet Excited States of Bodipy

2017 ◽  
Vol 122 (1) ◽  
pp. 185-193 ◽  
Author(s):  
Zhangrong Lou ◽  
Yuqi Hou ◽  
Kepeng Chen ◽  
Jianzhang Zhao ◽  
Shaomin Ji ◽  
...  
Keyword(s):  
Excited States ◽  
Quenching Effect ◽  
Triplet Excited States ◽  
Intramolecular Rotation

scholarly journals Induction annealing and subsequent quenching: Effect on the thermoelectric properties of boron-doped nanographite ensembles

2010 ◽  
Vol 81 (4) ◽  
pp. 043909 ◽  
Author(s):  
Ming Xie ◽  
Chee Huei Lee ◽  
Jiesheng Wang ◽  
Yoke Khin Yap ◽  
Paola Bruno ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Quenching Effect ◽  
Boron Doped ◽  
Induction Annealing ◽  
Subsequent Quenching

Er3+Incorporated Transparent Ternary Nanocomposite as Active Core Material in Polymer Optical Preform with Improved Photo-emission Performance

2021 ◽  
Vol 04 ◽  
Author(s):  
Ipsita Chinya ◽  
Ranjan Sen ◽  
Anirban Dhar
Keyword(s):  
Polymer Matrix ◽  
In Situ Polymerization ◽  
Fine Tuning ◽  
Core Material ◽  
Scattering Loss ◽  
Quenching Effect ◽  
Ternary Nanocomposite ◽  
Active Core ◽  
20 Nm ◽  
Re Elements

Background: A polymer as a host in the optical waveguide has many advantages and, when doped with rare-earth (RE) elements, offers an efficient connection, compared to its glass-based counterparts as an amplifier. However, a polymer matrix causes the concentration quenching effect of REs in the polymer matrix, making the fabrication of RE-doped polymer waveguides more complicated as compared to the fabrication of glass-based complements. Moreover, controlling scattering loss at the particle-polymer interface for maintaining the optical clarity of the composite is also a great challenge. Objective: The main aim of the present study was to optimize the synthesis of Er2O3grafted Polymethylmethacrylate (PMMA)-Polystyrene (PS) composite based transparent ternary nanocomposite and its characterization to implement them as a potential material for active core in Polymer Optical Preform (POP). Methods: Nano Erbium Oxide (Er2O3) was successfully synthesized by the wet-chemical method and encapsulated by a polymerizable surfactant, i.e., 3-Methacyloxypropyltrimethoxy silane (MPS). The encapsulated nanoparticles were further subjected to grafting with PMMA using in-situ polymerization of methyl methacrylate (MMA) followed by blending with PS via solvent mixing technique. Results: The optical transparency of the ternary composite was achieved by fine-tuning the diameter (15-20 nm) of the PMMA coated Er2O3. The crystallinity present in Er2O3 was significantly reduced after PMMA coating. The comparatively higher refractive index obtained at 589 nm wavelength for the synthesized material indicated its usability as active core material in the presence of a commercial acrylate cladding tube. A photoluminescence (Pl) study indicated that the technique might be used for a higher level of Er3+doping in polymer matrix without sacrificing its transparency. Conclusion: The obtained results indicated that the sample synthesized with the adopted technique gives better Pl intensity compared to the other methods of Er3+ incorporation in polymer optical preform (POP).

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