scholarly journals Fluorescent core–shell nanoparticles and nanocapsules using comb-like macromolecular RAFT agents: synthesis and functionalization thereof

2016 ◽  
Vol 7 (25) ◽  
pp. 4272-4283 ◽  
Author(s):  
Chloé Grazon ◽  
Jutta Rieger ◽  
Patricia Beaunier ◽  
Rachel Méallet-Renault ◽  
Gilles Clavier
Keyword(s):  
Acrylic Acid ◽  
Miniemulsion Polymerization ◽  
Polymerization Process ◽  
Core Shell ◽  
Fluorescent Nanoparticles ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Ultra-bright fluorescent nanoparticles with comb-like shells based on PEG and acrylic acid were obtained in water using an additive-free miniemulsion polymerization process.

Fabrication and Biofunctionalization of Selenium-Polypyrrole Core–Shell Nanoparticles for Targeting and Imaging of Cancer Cells

2008 ◽  
Vol 8 (5) ◽  
pp. 2488-2491 ◽  
Author(s):  
Jing-Liang Li ◽  
Xiang-Yang Liu
Keyword(s):  
Cancer Cells ◽  
Polymerization Process ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Cervical Cancer Cells ◽  
Core Shell Nanoparticles ◽  
Human Cervical Cancer Cells ◽  
Thermal Stability Of ◽  
Human Cervical Cancer

Selenium-polypyrrole core–shell nanoparticles are fabricated by an in-situ polymerization process and functionalized with transferrin for targeting and imaging of human cervical cancer cells. The shell thickness and chemical composition of the as-synthesized particles can be manipulated by controlling the precursor concentration. The presence of the polymer layer can greatly increase the thermal stability of the selenium nanoparticles. The presence of transferrin molecules on the surface of the core–shell nanoparticles can significantly enhance their cellular uptake. The tranferrin-conjugated core–shell nanoparticles can be potentially used for the targeting and imaging of cancer cells.

Radiation Induced Generation of Core–Shell Nanoparticles in Polyelectrolyte Films of Poly(acrylic acid)–Poly(ethylenimine) Complex with Copper and Silver Ions

2020 ◽  
Vol 124 (26) ◽  
pp. 14409-14418
Author(s):  
Dmitry I. Klimov ◽  
Elena A. Zezina ◽  
Yan V. Zubavichus ◽  
Sergey B. Zezin ◽  
Sergey N. Chvalun ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Silver Ions ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Radiation Induced ◽  
Core Shell Nanoparticles ◽  
Poly Acrylic Acid

scholarly journals Synthesis of Poly(methyl methacrylate-co-butyl acrylate)/Perfluorosilyl Methacrylate Core-Shell Nanoparticles: Novel Approach for Optimization of Coating Process

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1186 ◽  
Author(s):  
Jun-Won Kook ◽  
Yongsoo Kim ◽  
Kiseob Hwang ◽  
Jung Kim ◽  
Jun-Young Lee
Keyword(s):  
Surface Properties ◽  
Cellulose Fiber ◽  
Polymerization Process ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Novel Approach ◽  
Coated Surface ◽  
Silane Monomer ◽  
Core Shell Nanoparticles ◽  
Coating Formulation

In this study, the coating order of two monomers in the shell polymerization process of core-shell nanoparticles was altered to facilitate easy coating and optimize the properties of the coated surface to simplify the additional coating formulation process. To obtain a glass transition temperature suitable for coating, a core was synthesized by the copolymerization of an acryl monomer. A perfluoro monomer and silane monomer were additionally added to synthesize nanoparticles exhibiting both water–oil repellency and anchoring properties. In order to realize various surface properties, the nanoparticles underwent surface modification and cellulose fiber was introduced. Through the various data described in this text, the surface properties improved with the order of the introduction of the two monomers.

Critical shell thickness and emission enhancement of NaYF4:Yb,Er/NaYF4/silica core/shell/shell nanoparticles

2009 ◽  
Vol 24 (12) ◽  
pp. 3559-3568 ◽  
Author(s):  
Li Peng Qian ◽  
Du Yuan ◽  
Guang Shun Yi ◽  
Gan Moog Chow
Keyword(s):  
Emission Intensity ◽  
Shell Thickness ◽  
Silica Coating ◽  
Inorganic Nanoparticles ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Fluorescent Nanoparticles ◽  
Shell Nanoparticles ◽  
Silica Core ◽  
Core Shell Nanoparticles

Amorphous silica shells, used for functionalization of inorganic nanoparticles in bioapplications, were coated on chemically synthesized NaYF4:Yb,Er upconversion fluorescent nanoparticles via a reverse microemulsion method by using dual surfactants of polyoxyethylene (5) nonylphenylether and 1-hexanol, and tetraethyl orthosilicate as precursor. NaYF4:Yb,Er nanoparticles were equiaxed with a particle size of 11.1 ± 1.3 nm. The thickness of silica shell was ∼8 nm. NaYF4:Yb,Er/silica core/shell nanoparticles were well dispersed in solvents such as ethanol and deionized water. The emission intensities of NaYF4:Yb,Er/silica core/shell nanoparticles remained the same as that of uncoated nanoparticles after surface functionalization with an amine group using (3-aminopropyl)-trimethoxysilan. Silica, although providing a good barrier to the nonradiative relaxation between the upconversion nanoparticles and the environments, did not enhance the emission intensity of upconversion nanoparticles. To increase the emission intensity of NaYF4:Yb,Er/silica core/shell nanoparticles, an undoped NaYF4 shell (∼3-nm thick) was deposited on the upconversion nanoparticles before the silica coating. The total emission intensity of NaYF4:Yb,Er/NaYF4/silica core/shell/shell nanoparticles increased by 15 times compared to that without the intermediate NaYF4 shell. The critical shell thickness of NaYF4 was ∼3 nm, beyond which no further emission intensity enhancement was observed.

Synthesis of well-defined core–shell nanoparticles based on bifunctional poly(2-oxazoline) macromonomer surfactants and a microemulsion polymerization process

RSC Advances ◽  
2016 ◽  
Vol 6 (102) ◽  
pp. 99752-99763 ◽  
Author(s):  
Anne-Larissa Kampmann ◽  
Tobias Grabe ◽  
Carolin Jaworski ◽  
Ralf Weberskirch
Keyword(s):  
Polymerization Process ◽  
Core Shell ◽  
Microemulsion Polymerization ◽  
Shell Nanoparticles ◽  
Functional Nanoparticles ◽  
Core Shell Nanoparticles

Surface-functional nanoparticles have been fabricated by utilizing bifunctional poly(2-oxazoline) macromonomers as surfactants in a microemulsion process.

Facile Fabrication of Antibacterial Core–Shell Nanoparticles Based on PHMG Oligomers and PAA Networks via Template Polymerization

2014 ◽  
Vol 67 (1) ◽  
pp. 142 ◽  
Author(s):  
You Wei Zhang ◽  
Yan Chen ◽  
Jiong Xin Zhao
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Acrylic Acid ◽  
Electrostatic Interactions ◽  
Minimum Size ◽  
Core Shell ◽  
Nanoparticle Dispersion ◽  
Shell Nanoparticles ◽  
Transmission Electron ◽  
Core Shell Nanoparticles

Antibacterial core–shell nanoparticles based on poly(hexamethylene guanidine hydrochloride) (PHMG) oligomers and poly(acrylic acid) (PAA) networks are efficiently fabricated via a facile one-step co-polymerization of acrylic acid and N,N′-methylenebisacrylamide on PHMG templates in aqueous solution. Dynamic light scattering, Fourier-transform infrared spectroscopy, and transmission electron microscopy observations were used to characterize the size, morphology, and structure of the nanoparticles, as well as the interactions between the components. Also, the stability of the nanoparticle dispersion against storage, pH value, salt, and temperature was investigated. The results show that the crosslinked PAA/PHMG nanoparticles are stabilized by electrostatic interactions. The core–shell structure of the nanoparticles was confirmed by transmission electron microscopy observation. The size of the nanoparticles increases substantially with extension of storage or with increase of the salt concentration. The nanoparticle dispersion is stable in a pH range of 2.0–4.0. The size change of the nanoparticles with pH of the medium is parabolic, and the minimum size is reached at pH 3.0. A rise of temperature leads to a slight and recoverable size increase of the nanoparticles. Antibacterial efficiency was evaluated quantitatively against Escherichia coli and Staphylococcus aureus by the plating method according to Standard JC/T 897–2002. The antibacterial activity against these two bacteria are both above 99.0 % at a nanoparticle concentration of 5 mg mL–1. This makes the nanoparticle dispersion a good candidate for the application of antibacterial water-based coatings and textiles coating.

Sign in / Sign up

Export Citation Format

Share Document