Upconversion-luminescent/magnetic dual-functional sub-20 nm core–shell SrF2:Yb,Tm@CaF2:Gd heteronanoparticles

2016 ◽  
Vol 45 (13) ◽  
pp. 5800-5807 ◽  
Author(s):  
Ai-Hua Li ◽  
Mengyun Lü ◽  
Jun Yang ◽  
Lin Chen ◽  
Xiaohong Cui ◽  
...  
Keyword(s):  
High Efficiency ◽  
Upconversion Luminescence ◽  
Water Soluble ◽  
Core Shell ◽  
Dual Functional ◽  
Magnetic Shell ◽  
20 Nm

Combination of a high-efficiency upconversion luminescence core with a biocompatible magnetic shell endows hydrothermal-synthesized water-soluble nanoparticles with improved dual-modal bioimaging capabilities.

Highly efficient BODIPY-doped upconversion nanoparticles for deep-red luminescence bioimaging in vivo

2021 ◽  
Author(s):  
Ti Jia ◽  
Qiuhong Wang ◽  
Ming Xu ◽  
Wei Yuan ◽  
Wei Feng ◽  
...  
Keyword(s):  
High Efficiency ◽  
Upconversion Luminescence ◽  
Excitation Power ◽  
Water Soluble ◽  
Upconversion Nanoparticles ◽  
Highly Efficient ◽  
Red Luminescence

We demonstrate a 3,5-di(p-oxethyl)styryl conjugated BODIPY showing deep-red upconversion luminescence with a high efficiency of 16.6%. Furthermore, water-soluble BODIPY-doped upconversion nanoparticles with efficiency up to 6.9% under low excitation power...

Shaggy-like Ru-clusters decorated core-shell metal-organic framework-derived CoOx@NPC as high-efficiency catalyst for NaBH4 hydrolysis

2021 ◽  
Vol 46 (11) ◽  
pp. 7772-7781 ◽  
Author(s):  
Shasha Dou ◽  
Wanyu Zhang ◽  
Yuting Yang ◽  
Shuqing Zhou ◽  
Xianfa Rao ◽  
...  
Keyword(s):  
High Efficiency ◽  
Metal Organic Framework ◽  
Core Shell ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Solubilization of Charged Porphyrins in Interpolyelectrolyte Complexes: A Computer Study

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 502
Author(s):  
Karel Šindelka ◽  
Zuzana Limpouchová ◽  
Karel Procházka
Keyword(s):  
Dissipative Particle Dynamics ◽  
Water Soluble ◽  
Coarse Grained ◽  
Core Shell ◽  
Computer Study ◽  
Interpolyelectrolyte Complex ◽  
The Core ◽  
Porphyrin Derivatives ◽  
Oppositely Charged ◽  
Positively Charged

Using coarse-grained dissipative particle dynamics (DPD) with explicit electrostatics, we performed (i) an extensive series of simulations of the electrostatic co-assembly of asymmetric oppositely charged copolymers composed of one (either positively or negatively charged) polyelectrolyte (PE) block A and one water-soluble block B and (ii) studied the solubilization of positively charged porphyrin derivatives (P+) in the interpolyelectrolyte complex (IPEC) cores of co-assembled nanoparticles. We studied the stoichiometric mixtures of 137 A10+B25 and 137 A10−B25 chains with moderately hydrophobic A blocks (DPD interaction parameter aAS=35) and hydrophilic B blocks (aBS=25) with 10 to 120 P+ added (aPS=39). The P+ interactions with other components were set to match literature information on their limited solubility and aggregation behavior. The study shows that the moderately soluble P+ molecules easily solubilize in IPEC cores, where they partly replace PE+ and electrostatically crosslink PE− blocks. As the large P+ rings are apt to aggregate, P+ molecules aggregate in IPEC cores. The aggregation, which starts at very low loadings, is promoted by increasing the number of P+ in the mixture. The positively charged copolymers repelled from the central part of IPEC core partially concentrate at the core-shell interface and partially escape into bulk solvent depending on the amount of P+ in the mixture and on their association number, AS. If AS is lower than the ensemble average ⟨AS⟩n, the copolymer chains released from IPEC preferentially concentrate at the core-shell interface, thus increasing AS, which approaches ⟨AS⟩n. If AS>⟨AS⟩n, they escape into the bulk solvent.

Synergized Cu/Pb Core/Shell Electrocatalyst for High-Efficiency CO2 Reduction to C2+ Liquids

ACS Nano ◽  
2020 ◽  
Author(s):  
Pengtang Wang ◽  
Hao Yang ◽  
Yong Xu ◽  
Xiaoqing Huang ◽  
Juan Wang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Co2 Reduction ◽  
Core Shell

scholarly journals Fabrication of copper(II)-coated magnetic core-shell nanoparticles Fe3O4@SiO2-2-aminobenzohydrazide and investigation of its catalytic application in the synthesis of 1,2,3-triazole compounds

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
H. Rajabi-Moghaddam ◽  
M. R. Naimi-Jamal ◽  
M. Tajbakhsh
Keyword(s):  
High Efficiency ◽  
Click Reaction ◽  
Magnetic Core ◽  
Core Shell ◽  
Isatoic Anhydride ◽  
Shell Nanoparticles ◽  
Triazole Derivatives ◽  
Catalytic Application ◽  
Ft Ir ◽  
Core Shell Nanoparticles

AbstractIn the present work, an attempt has been made to synthesize the 1,2,3-triazole derivatives resulting from the click reaction, in a mild and green environment using the new copper(II)-coated magnetic core–shell nanoparticles Fe3O4@SiO2 modified by isatoic anhydride. The structure of the catalyst has been determined by XRD, FE-SEM, TGA, VSM, EDS, and FT-IR analyzes. The high efficiency and the ability to be recovered and reused for at least up to 6 consecutive runs are some superior properties of the catalyst.

Formation of Core-Shell Nanoparticles by Laser Ablation of Copper and Brass in Liquids

2005 ◽  
Vol 106 ◽  
pp. 23-26 ◽  
Author(s):  
P.V. Kazakevich ◽  
A.V. Simakin ◽  
V.V. Voronov ◽  
G.A. Shafeev ◽  
D. Starikov ◽  
...  
Keyword(s):  
Core Shell ◽  
Copper Vapour Laser ◽  
Shell Nanoparticles ◽  
Liquid Environment ◽  
Pulsed Nd:Yag Laser ◽  
Plasmon Peak ◽  
Average Size ◽  
Core Shell Nanoparticles ◽  
20 Nm ◽  
Surrounding Liquid

Experimental results are presented on the ablation of copper and brass targets in a liquid environment: ethanol, acetone, or water by irradiation with either a pulsed copper vapour laser (0.51 μm) or a pulsed Nd:YAG laser (1.06 μm). The ablated material was ejected into the surrounding liquid as nanoparticles of average size 20 nm. The nanoparticle composition depends on the nature of the liquid. Ablation of 60%Cu, 40%Zn brass in ethanol results in formation of core-shell nanoparticles. Brass nanoparticles were characterized by a well-defined plasmon peak at 510-520 nm.

Optical Temperature Sensing of Core-Shell Structured NaYF4:Yb3+, Er3+@NaYF4 Nanocrystals with Different Shell Thickness

2015 ◽  
Vol 738-739 ◽  
pp. 27-30
Author(s):  
Dong Dong Li ◽  
Qi Yue Shao ◽  
Yan Dong ◽  
Jian Qing Jiang
Keyword(s):  
Shell Thickness ◽  
Thermal Sensitivity ◽  
Upconversion Luminescence ◽  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Sensing Properties ◽  
The Core ◽  
Β Phase ◽  
Biomedical Fields

Hexagonal (β)-phase NaYF4:Yb3+, Er3+ upconversion nanoparticles (UCNPs) with and without an inert (undoped NaYF4) shell have been successfully synthesized and the effects of shell thickness on the upconversion luminescence (UCL) and temperature sensing properties were systematically investigated. It was found that the NaYF4 shell and its thickness do not affect the RHS values and thermal sensitivity, but can obviously improve the UCL intensity of NaYF4:Yb3+, Er3+ UCNPs. It implies that the core-shell structured NaYF4:Yb3+, Er3+@NaYF4 UCNPs with excellent UCL properties have great potential to be used as temperature sensing probes in biomedical fields, without considering the influences of the shell thickness on their temperature sensing properties.

High-efficiency and mechano-/photo- bi-catalysis of piezoelectric-ZnO@ photoelectric-TiO 2 core-shell nanofibers for dye decomposition

Chemosphere ◽  
2017 ◽  
Vol 183 ◽  
pp. 528-535 ◽  
Author(s):  
Huilin You ◽  
Zheng Wu ◽  
Yanmin Jia ◽  
Xiaoli Xu ◽  
Yuntao Xia ◽  
...  
Keyword(s):  
High Efficiency ◽  
Core Shell ◽  
Dye Decomposition
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