scholarly journals Stimuli-responsive magneto-/electro-chromatic color-tunable hydrophobic surface modified Fe3O4@SiO2 core–shell nanoparticles for reflective display approaches

RSC Advances ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 6988-6993 ◽  
Author(s):  
S. Lee ◽  
J. Y. Kim ◽  
S. Cheon ◽  
S. Kim ◽  
D. Kim ◽  
...  
Keyword(s):  
Hydrophobic Surface ◽  
Stimuli Responsive ◽  
Color Gamut ◽  
Shell Nanoparticles ◽  
Reflective Displays ◽  
Color Tunable ◽  
Surface Modified ◽  
Core Shell Nanoparticles ◽  
Reflective Display ◽  
Chromatic Color

Magneto-/electro-chromatic reflective color tunability is confirmed using hydrophobic surface modified magnetite nanoparticles. The optical reflective color spectra and color gamut demonstrate the promising applications in reflective displays.

scholarly journals Development of paclitaxel-loaded poly(lactic acid)/hydroxyapatite core–shell nanoparticles as a stimuli-responsive drug delivery system

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Sungho Lee ◽  
Tatsuya Miyajima ◽  
Ayae Sugawara-Narutaki ◽  
Katsuya Kato ◽  
Fukue Nagata
Keyword(s):  
Drug Delivery ◽  
Lactic Acid ◽  
Delivery Systems ◽  
Ph Sensitivity ◽  
Poly Lactic Acid ◽  
Core Shell ◽  
Stimuli Responsive ◽  
Shell Nanoparticles ◽  
The Core ◽  
Core Shell Nanoparticles

Biodegradable nanoparticles have been well studied as biocompatible delivery systems. Nanoparticles of less than 200 nm in size can facilitate the passive targeting of drugs to tumour tissues and their accumulation therein via the enhanced permeability and retention (EPR) effect. Recent studies have focused on stimuli-responsive drug delivery systems (DDS) for improving the effectiveness of chemotherapy; for example, pH-sensitive DDS depend on the weakly acidic and neutral extracellular pH of tumour and normal tissues, respectively. In our previous work, core–shell nanoparticles composed of the biodegradable polymer poly(lactic acid) (PLA) and the widely used inorganic biomaterial hydroxyapatite (HAp, which exhibits pH sensitivity) were prepared using a surfactant-free method. These PLA/HAp core–shell nanoparticles could load 750 wt% of a hydrophobic model drug. In this work, the properties of the PLA/HAp core–shell nanoparticles loaded with the anti-cancer drug paclitaxel (PTX) were thoroughly investigated in vitro . Because the PTX-containing nanoparticles were approximately 80 nm in size, they can be expected to facilitate efficient drug delivery via the EPR effect. The core–shell nanoparticles were cytotoxic towards cancer cells (4T1). This was due to the pH sensitivity of the HAp shell, which is stable in neutral conditions and dissolves in acidic conditions. The cytotoxic activity of the PTX-loaded nanoparticles was sustained for up to 48 h, which was suitable for tumour growth inhibition. These results suggest that the core–shell nanoparticles can be suitable drug carriers for various water-insoluble drugs.

Photo-cured PMMA/PEI core/shell nanoparticles surface-modified with Gd–DTPA for T1 MR imaging

2014 ◽  
Vol 415 ◽  
pp. 70-76 ◽  
Author(s):  
Montri Ratanajanchai ◽  
Don Haeng Lee ◽  
Panya Sunintaboon ◽  
Su-Geun Yang
Keyword(s):  
Mr Imaging ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Surface Modified ◽  
Core Shell Nanoparticles

Solvent relaxation studies applied to stimuli-responsive core-shell nanoparticles

2010 ◽  
Author(s):  
Karel Procházka ◽  
Pavel Matějíček ◽  
Miroslav Štěpánek ◽  
Zuzana Limpouchová ◽  
Martin Hof ◽  
...  
Keyword(s):  
Core Shell ◽  
Stimuli Responsive ◽  
Solvent Relaxation ◽  
Shell Nanoparticles ◽  
Relaxation Studies ◽  
Core Shell Nanoparticles

scholarly journals Stimuli-Responsive Particle-Based Amphiphiles as Active Colloids Prepared by Anisotropic Click Chemistry

2020 ◽  
Author(s):  
Cornelia Lanz ◽  
Moritz Schlötter ◽  
Nele Klinkenberg ◽  
Patricia Besirske ◽  
Sebastian Polarz
Keyword(s):  
Magnetic Field ◽  
Magnetic Particles ◽  
Magnetic Response ◽  
Stimuli Responsive ◽  
Reversible Change ◽  
Strong Response ◽  
Shell Nanoparticles ◽  
Spatial Control ◽  
Smart Systems ◽  
Core Shell Nanoparticles

Amphiphiles alter the energy of surfaces, but the extent of this feature is typically constant. Smart systems with amphiphilicity as a function of an external, physical trigger are desirable. As a trigger, the exposure to a magnetic field, in particular, is desired because it is not shielded in water. Amphiphiles like surfactants are well known, but the magnetic response of molecules is typically weak. Vice-versa, magnetic particles with strong response to magnetic triggers are fully established in nanoscience, but they are not amphiphilic. In this work colloids with Janus architecture and ultra-small dimensions (25nm) have been prepared by spatial control over the Thiol-Yne click modification of organosilica-magnetite core-shell nanoparticles. The amphiphilic properties of these anisotropically modified particles are proven. Finally, a pronounced and reversible change in interfacial stabilization results from the application of a weak (<<1T) magnetic field.

Dual Stimuli-Responsive Smart Fluid of Graphene Oxide-Coated Iron Oxide/Silica Core/Shell Nanoparticles

2016 ◽  
Vol 28 (8) ◽  
pp. 2624-2633 ◽  
Author(s):  
Seungae Lee ◽  
Jungchul Noh ◽  
Seunghee Hong ◽  
Yun Ki Kim ◽  
Jyongsik Jang
Keyword(s):  
Graphene Oxide ◽  
Iron Oxide ◽  
Core Shell ◽  
Stimuli Responsive ◽  
Shell Nanoparticles ◽  
Silica Core ◽  
Core Shell Nanoparticles

scholarly journals Stimuli-Responsive Particle-Based Amphiphiles as Active Colloids Prepared by Anisotropic Click Chemistry

2020 ◽  
Author(s):  
Cornelia Lanz ◽  
Moritz Schlötter ◽  
Nele Klinkenberg ◽  
Patricia Besirske ◽  
Sebastian Polarz
Keyword(s):  
Magnetic Field ◽  
Magnetic Particles ◽  
Magnetic Response ◽  
Stimuli Responsive ◽  
Reversible Change ◽  
Strong Response ◽  
Shell Nanoparticles ◽  
Spatial Control ◽  
Smart Systems ◽  
Core Shell Nanoparticles

Amphiphiles alter the energy of surfaces, but the extent of this feature is typically constant. Smart systems with amphiphilicity as a function of an external, physical trigger are desirable. As a trigger, the exposure to a magnetic field, in particular, is desired because it is not shielded in water. Amphiphiles like surfactants are well known, but the magnetic response of molecules is typically weak. Vice-versa, magnetic particles with strong response to magnetic triggers are fully established in nanoscience, but they are not amphiphilic. In this work colloids with Janus architecture and ultra-small dimensions (25nm) have been prepared by spatial control over the Thiol-Yne click modification of organosilica-magnetite core-shell nanoparticles. The amphiphilic properties of these anisotropically modified particles are proven. Finally, a pronounced and reversible change in interfacial stabilization results from the application of a weak (<<1T) magnetic field.

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