Preparation conditions effect on the physico-chemical properties of magnetic–plasmonic core–shell nanoparticles functionalized with chitosan: Green route

Functionalized magnetic microspheres were prepared by anchoring cross-linked core–shell poly(N-isopropylacrylamide-co-acrylic acid) (P(NIPAM-co-AA)) nanoparticles onto silica-coated magnetic microspheres (Fe3O4@SiO2). First, the smaller polystyrene/P(NIPAM-co-AA) core–shell nanoparticles were synthesized through seed emulsion polymerization and adhered to the surface of amino-modified Fe3O4@SiO2 micorspheres, which were made using the modified Stöber method through electrostatic interaction under appropriate preparation conditions. An amidation reaction between the carboxylic and amino groups on the respective surfaces was then catalyzed. Finally, the novel architecture magnetic microspheres with multiresponsive functionalities were obtained, and their polymerization conditions, environmental sensitivity, and magnetic properties were discussed and optimized. The superparamagnetism and temperature/pH dual responsivity and excellent dispersibility of the P(NIPAM-co-AA) functionalized magnetic microspheres provide them with high potential to be used in the fields of controlled drug delivery, bioseparation, and catalysis.

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Physico-Chemical Properties of Silica Coated Superparamagnetic Magnetite Nanoparticles Synthesized by Non-Seeded Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1107.267 ◽

2015 ◽

Vol 1107 ◽

pp. 267-271

Author(s):

Sodipo Bashiru Kayode ◽

Azlan Abdul Aziz

Keyword(s):

Silica Nanoparticles ◽

Magnetite Nanoparticles ◽

Colloidal Suspension ◽

Sol Gel ◽

Chemical Properties ◽

Colloidal Suspensions ◽

Core Shell ◽

Shell Nanoparticles ◽

Physico Chemical ◽

Physical And Chemical

The science of core-shell nanoparticles requires investigation into several physical and chemical properties of the composite nanoparticles. Unlike the conventional sol-gel or the reverse microemulsion micelle method, we presented here a non-seeded process of encapsulating superparamagnetic magnetite nanoparticles (SPMN) with silica. Physico-chemical analysis of the product was used to confirm the result of the coating procedure. Colloidal suspension of SPMN and silica nanoparticles were synthesised through coprecipitation method and modified Stöber method respectively. Afterwards, both colloidal suspensions of SPMN and silica nanoparticles were sonicated to encapsulate the SPMN with silica. Elemental mapping of the composite particles with electron spectroscopy imaging (ESI) confirmed the core-shell micrograph of the SPMN and silica. The X-ray diffraction pattern (XRD) showed the silica shell to be in amorphous form. FTIR analysis further confirmed the chemical properties of the product to be silica coated SPMN.

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Synthesis of gold–silica core–shell nanoparticles by pulsed laser ablation in liquid and their physico-chemical properties towards photothermal cancer therapy

Nanoscale ◽

10.1039/c9nr07129f ◽

2020 ◽

Vol 12 (5) ◽

pp. 3007-3018 ◽

Cited By ~ 8

Author(s):

René Riedel ◽

Nora Mahr ◽

Chenyang Yao ◽

Aiguo Wu ◽

Fang Yang ◽

...

Keyword(s):

Pulsed Laser ◽

Chemical Properties ◽

Pulsed Laser Ablation ◽

Physical Method ◽

Scale Production ◽

Laser Ablation In Liquid ◽

Shell Nanoparticles ◽

Physico Chemical ◽

Core Shell Nanoparticles ◽

Biomedical Interest

Due to the increasing scientific and biomedical interest in various nanoparticles (NPs) showing excellent properties, a convenient and adjustable physical method with improved efficiency needs to be used for enabling tech-scale production of such promising NPs.

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Recent Advancement in Functional Core-Shell Nanoparticles of Polymers: Synthesis, Physical Properties, and Applications in Medical Biotechnology

Journal of Nanoparticles ◽

10.1155/2013/672059 ◽

2013 ◽

Vol 2013 ◽

pp. 1-24 ◽

Cited By ~ 52

Author(s):

K. Santhosh Kumar ◽

Vijay Bhooshan Kumar ◽

Pradip Paik

Keyword(s):

Chemical Properties ◽

Core Shell ◽

Shell Nanoparticles ◽

The Core ◽

Shell Nanostructures ◽

Experimental Parameters ◽

Recent Advancement ◽

Core Shell Nanoparticles ◽

Physical And Chemical ◽

And Chemical Properties

This paper covers the core-shell nanomaterials, mainly, polymer-core polymer shell, polymer-core metal shell, and polymer-core nonmetal shells. Herein, various synthesis techniques, properties, and applications of these materials have been discussed. The detailed discussion of the properties with experimental parameters has been carried out. The various characterization techniques for the core-shell nanostructure have also been discussed. Their physical and chemical properties have been addressed. The future aspects of such core-shell nanostructures for biomedical and various other applications have been discussed with a special emphasis on their properties.

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Physico-chemical characteristics, biocompatibility, and MRI applicability of novel monodisperse PEG-modified magnetic Fe3O4&SiO2 core–shell nanoparticles

RSC Advances ◽

10.1039/c7ra00224f ◽

2017 ◽

Vol 7 (15) ◽

pp. 8786-8797 ◽

Cited By ~ 22

Author(s):

Uliana Kostiv ◽

Vitalii Patsula ◽

Miroslav Šlouf ◽

Igor M. Pongrac ◽

Siniša Škokić ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Chemical Characteristics ◽

Core Shell ◽

Resonance Imaging ◽

Shell Nanoparticles ◽

Physico Chemical ◽

Magnetic Resonance Imaging Mri ◽

Core Shell Nanoparticles ◽

Magnetic Fe3o4

Biocompatible monodisperse PEG-modified magnetic Fe3O4&SiO2 core–shell nanoparticles with controlled size provided sufficient contrast for magnetic resonance imaging (MRI).

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Highly Adhesive and Sustainable UV/Heat Dual-Curable Adhesives Embedded with Reactive Core-Shell Polymer Nanoparticles for Super-Narrow Bezel Display

Materials ◽

10.3390/ma13163492 ◽

2020 ◽

Vol 13 (16) ◽

pp. 3492

Author(s):

Jun Hyup Lee

Keyword(s):

Bisphenol A ◽

Chemical Properties ◽

Core Shell ◽

Shell Nanoparticles ◽

High Adhesion ◽

Curing Characteristics ◽

High Elongation ◽

Core Shell Nanoparticles ◽

Pei Nanoparticles ◽

Physical And Chemical

To achieve the seamless characteristics of displays, liquid crystal (LC) devices need a super-narrow bezel design. This device architecture can be constructed using functional adhesives that possess excellent physical and chemical properties. In this study, mechanically robust ultraviolet (UV)/heat dual-curable adhesives with outstanding reliability and processability have been fabricated using reactive poly(methyl methacrylate) (PMMA)/polyethyleneimine (PEI) core-shell nanoparticles. Their curing characteristics, narrow drawing processability, adhesive strength, elongation at break, and the contact contamination of LCs have been investigated. Compared to conventional adhesive material, the proposed adhesive containing multifunctional PMMA/PEI nanoparticles afforded a high adhesion strength of 40.2 kgf cm−2 and a high elongation of 64.8% due to the formation of a firm crosslinked network with matrix resins comprising bisphenol A epoxy resin and bisphenol A glycerolate dimethacrylate. Moreover, the proposed adhesive showed an excellent narrow drawing width of 1.2 mm, which is a prerequisite for super-narrow bezel display. With regard to LC contamination, it was found that the level of contamination could be remarkably reduced to 61 µm by a high-temperature curing process. This study makes a significant contribution to the development of advanced display, because it provides robust and sustainable display adhesives based on nanomaterials, thereby enhancing the life and sustained operability of displays.

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