Preparation and spectroscopic study of a water-soluble NaYF4:Yb3+/Er3+@NaGdF4 crystal particle and its application in bioimaging

2019 ◽  
Vol 43 (4) ◽  
pp. 1770-1774 ◽  
Author(s):  
Jiajia Meng ◽  
Zhenglong Zhang ◽  
Baobao Zhang ◽  
Ye Gao ◽  
Guian Li ◽  
...  
Keyword(s):  
Spectroscopic Study ◽  
Hydrothermal Method ◽  
Water Soluble ◽  
Core Shell ◽  
Shell Particles ◽  
Crystal Particle

Water-soluble, magnetic and up-conversion luminescent NaYF4:Yb3+/Er3+@NaGdF4 core–shell particles were prepared directly by the hydrothermal method.

Overview of polyethylene glycol-based materials with a special focus on core-shell particles for drug delivery application

2021 ◽  
Vol 27 ◽  
Author(s):  
Nasrullah Shah ◽  
Manzoor Hussain ◽  
Touseef Rehan ◽  
Abbas Khan ◽  
Zubair Ullah Khan
Keyword(s):  
Drug Delivery ◽  
Biomedical Applications ◽  
Water Soluble ◽  
Core Shell ◽  
Special Focus ◽  
Tissue Engineering Scaffolds ◽  
Shell Nanoparticles ◽  
Composites Materials ◽  
Shell Particles ◽  
Core Shell Nanoparticles

: Polyethylene glycols (PEG) are water-soluble nonionic polymeric molecules. PEG and PEG-based materials are used for various important applications such as solvents, adhesives, adsorbents, drug delivery agents, tissue engineering scaffolds, etc. The coating of nanoparticles with PEG forms core-shell nanoparticles. The PEG-based core-shell nanoparticles are synthesized for the development of high-quality drug delivery systems. In the present review, we first explained the basics and various applications of PEGs and PEG-based composites materials and then concentrated on the PEG-based core-shell nanoparticles for biomedical applications specifically their use in drug delivery.

Tunable core–shell particles generated from smart water-soluble chitosan seeds

2016 ◽  
Vol 142 ◽  
pp. 51-55 ◽  
Author(s):  
Congming Xiao ◽  
Rongrui You ◽  
Yanrui Dong ◽  
Zhongxin Zhang
Keyword(s):  
Water Soluble ◽  
Core Shell ◽  
Smart Water ◽  
Shell Particles

scholarly journals Characterization study of polyAMPS@BMA core-shell particles using two types of RAFT agents

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Nasrullah Shah ◽  
Zubair Ullah Khan ◽  
Manzoor Hussain ◽  
Touseef Rehan ◽  
Abbas Khan
Keyword(s):  
Raft Polymerization ◽  
Analytical Techniques ◽  
Water Soluble ◽  
Butyl Methacrylate ◽  
Core Shell ◽  
Water Soluble Polymer ◽  
X Ray ◽  
Reversible Addition ◽  
Characterization Study ◽  
Shell Particles

Abstract The study and application of reversible addition-fragmentation chain transfer (RAFT) polymerization have been widely reported in the literature because of its high compatibility with numerous monomers, reaction conditions, and low polydispersity index. The effect of RAFT agents on the characteristics of the final product is greatly needed to be explored. Our present study aimed to compare the influence of two different types of RAFT agents on the characteristics of the water-soluble polymer (2-acrylamido-2-methylpropane sulfonic acid) (polyAMPS) and their polyAMPS@butyl methacrylate (BMA) core-shell particles. Different analytical techniques including scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), and thermogravimetric analysis (TGA) were used to ascertain the final morphological, structural, and thermal properties of the resultant products. It was found that RAFT agents have shown a clear influence on the final properties of the resultant polyAMPS and their core-shell particles such as particle size, shape, size distribution, and thermal behavior. This study confirms that RAFT agents can control the final properties of the polymers and their core-shell particles.

Magnetic Properties of Fe3O4/CoFe2O4 Composite Nanoparticles with Core/Shell Architecture

2020 ◽  
Vol 65 (10) ◽  
pp. 904
Author(s):  
V. O. Zamorskyi ◽  
Ya. M. Lytvynenko ◽  
A. M. Pogorily ◽  
A. I. Tovstolytkin ◽  
S. O. Solopan ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Spinel Ferrite ◽  
Composite Nanoparticles ◽  
Core Shell ◽  
Cofe2o4 Nanoparticles ◽  
Core Diameter ◽  
The Core ◽  
Shell Particles ◽  
Interface Parameters ◽  
Shell Composite

Magnetic properties of the sets of Fe3O4(core)/CoFe2O4(shell) composite nanoparticles with a core diameter of about 6.3 nm and various shell thicknesses (0, 1.0, and 2.5 nm), as well as the mixtures of Fe3O4 and CoFe2O4 nanoparticles taken in the ratios corresponding to the core/shell material contents in the former case, have been studied. The results of magnetic research showed that the coating of magnetic nanoparticles with a shell gives rise to the appearance of two simultaneous effects: the modification of the core/shell interface parameters and the parameter change in both the nanoparticle’s core and shell themselves. As a result, the core/shell particles acquire new characteristics that are inherent neither to Fe3O4 nor to CoFe2O4. The obtained results open the way to the optimization and adaptation of the parameters of the core/shell spinel-ferrite-based nanoparticles for their application in various technological and biomedical domains.

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.

Titanium Dioxide−Polymer Core–Shell Particles Dispersions as Electronic Inks for Electrophoretic Displays

2008 ◽  
Vol 20 (4) ◽  
pp. 1292-1298 ◽  
Author(s):  
M. P. L. Werts ◽  
M. Badila ◽  
C. Brochon ◽  
A. Hébraud ◽  
G. Hadziioannou
Keyword(s):  
Titanium Dioxide ◽  
Core Shell ◽  
Shell Particles
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