The Multifunctionally Graded System for a Controlled Size Effect on Iron Oxide–Gold Based Core-Shell Nanoparticles

We report that Fe3O4@Au core-shell nanoparticles (NPs) serve as a multifunctional molecule delivery platform. This platform is also suitable for sensing the doxorubicin (DOX) through DNA hybridization, and the amount of carried DOX molecules was determined by size-dependent Fe3O4@Au NPs. The limits of detection (LODs) for DOX was found to be 1.839 nM. In our approach, an Au nano-shell coating was coupled with a specially designed DNA sequence using thiol bonding. By means of a high-frequency magnetic field (HFMF), a high release percentage of such a molecule could be efficiently achieved in a relatively short period of time. Furthermore, the thickness increase of the Au nano-shell affords Fe3O4@Au NPs with a larger surface area and a smaller temperature increment due to shielding effects from magnetic field. The change of magnetic property may enable the developed Fe3O4@Au-dsDNA/DOX NPs to be used as future nanocarrier material. More importantly, the core-shell NP structures were demonstrated to act as a controllable and efficient factor for molecule delivery.

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Carbon-coated Fe3O4 core–shell super-paramagnetic nanoparticle-based ferrofluid for heat transfer applications

Nanoscale Advances ◽

10.1039/d1na00061f ◽

2021 ◽

Author(s):

Mohd Imran ◽

Nasser Zouli ◽

Tansir Ahamad ◽

Saad M. Alshehri ◽

Mohammed Rehaan Chandan ◽

...

Keyword(s):

Magnetic Field ◽

Heat Transfer ◽

Thermal Conductivity ◽

External Magnetic Field ◽

Core Shell ◽

Shell Nanoparticles ◽

Carbon Coated ◽

Core Shell Nanoparticles ◽

Fe3o4 Core

Ferrofluids prepared by dispersing superparamagnetic Fe3O4@C core–shell nanoparticles in water exhibited exceptional enhancement in thermal conductivity without an external magnetic field.

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Magnetic-field-induced self-assembly of FeCo/CoFe2O4 core/shell nanoparticles with tunable collective magnetic properties

Nanoscale ◽

10.1039/d1nr00136a ◽

2021 ◽

Vol 13 (8) ◽

pp. 4519-4529

Author(s):

J. Mohapatra ◽

J. Elkins ◽

M. Xing ◽

D. Guragain ◽

Sanjay R. Mishra ◽

...

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Physical Properties ◽

Self Assembly ◽

Core Shell ◽

Shell Nanoparticles ◽

Novel Approach ◽

Core Shell Nanoparticles

Self-assembly of nanoparticles into ordered patterns is a novel approach to build up new consolidated materials with desired collective physical properties.

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Impact of the capping agent removal from Au NPs@MOF core-shell nanoparticles heterogeneous catalysts

Journal of Materials Chemistry A ◽

10.1039/d1ta09108e ◽

2022 ◽

Author(s):

Shan Dai ◽

Kieu Phung Ngoc ◽

Laurence Grimaud ◽

Sanjun Zhang ◽

Antoine Tissot ◽

...

Keyword(s):

Metal Nanoparticles ◽

Heterogeneous Catalysts ◽

Synergistic Effects ◽

Core Shell ◽

Capping Agent ◽

Shell Nanoparticles ◽

Au Nps ◽

Capping Agents ◽

Core Shell Nanoparticles

Metal nanoparticles encased in a MOF shell have shown remarkable properties in catalysis due to potential synergistic effects. However, capping agents, commonly used to prepare these nanoparticles, lower their reactivity...

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Magnetoelastoelectric coupling in core–shell nanoparticles enabling directional and mode-selective magnetic control of THz beam propagation

Nanoscale ◽

10.1039/c7nr03504g ◽

2017 ◽

Vol 9 (35) ◽

pp. 13052-13059 ◽

Cited By ~ 3

Author(s):

Moumita Dutta ◽

Kamaraju Natarajan ◽

Soutik Betal ◽

Rohit P. Prasankumar ◽

Amar S. Bhalla ◽

...

Keyword(s):

Magnetic Field ◽

Phase Modulation ◽

Beam Propagation ◽

Core Shell ◽

Magnetic Control ◽

Magnetic Field Direction ◽

Mode Switch ◽

Shell Nanoparticles ◽

Modulation Mode ◽

Core Shell Nanoparticles

Magnetoelastoelectric coupling in engineered biphasic core–shell nanocomposites demonstrates a dynamically tunable magnetic-field direction defined THz amplitude/phase modulation mode-switch.

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Shell thickness and dynamic magnetic field effects on the critical phenomena of magnetic core-shell nanoparticles with spherical geometry

Physica B Condensed Matter ◽

10.1016/j.physb.2016.12.022 ◽

2017 ◽

Vol 508 ◽

pp. 62-68 ◽

Cited By ~ 2

Author(s):

Yusuf Yüksel

Keyword(s):

Magnetic Field ◽

Critical Phenomena ◽

Shell Thickness ◽

Spherical Geometry ◽

Magnetic Core ◽

Core Shell ◽

Magnetic Field Effects ◽

Shell Nanoparticles ◽

Core Shell Nanoparticles ◽

Dynamic Magnetic Field

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Core-Size-Dependent Catalytic Properties of Bimetallic Au/Ag Core–Shell Nanoparticles

ACS Applied Materials & Interfaces ◽

10.1021/am507391d ◽

2014 ◽

Vol 6 (24) ◽

pp. 21946-21953 ◽

Cited By ~ 108

Author(s):

Krishna Kanta Haldar ◽

Simanta Kundu ◽

Amitava Patra

Keyword(s):

Catalytic Properties ◽

Core Shell ◽

Core Size ◽

Shell Nanoparticles ◽

Size Dependent ◽

Core Shell Nanoparticles

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Core-Shell Nanostructure ofα-Fe2O3/Fe3O4: Synthesis and Photocatalysis for Methyl Orange

Journal of Nanomaterials ◽

10.1155/2011/837123 ◽

2011 ◽

Vol 2011 ◽

pp. 1-5 ◽

Cited By ~ 10

Author(s):

Yang Tian ◽

Di Wu ◽

Xiao Jia ◽

Binbin Yu ◽

Sihui Zhan

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Methyl Orange ◽

Molten Salts ◽

Surface Oxidation ◽

The Self ◽

Core Shell ◽

Shell Nanoparticles ◽

Core Shell Nanoparticles

Fe3O4nanoparticle was synthesized in the solution involving water and ethanol. Then,α-Fe2O3shell was produced in situ on the surface of theFe3O4nanoparticle by surface oxidation in molten salts, formingα-Fe2O3/Fe3O4core-shell nanostructure. It was showed that the magnetic properties transformed from ferromagnetism to superparamagnetism after the primaryFe3O4nanoparticles were oxidized. Furthermore, the obtainedα-Fe2O3/Fe3O4core-shell nanoparticles were used to photocatalyse solution of methyl orange, and the results revealed thatα-Fe2O3/Fe3O4nanoparticles were more efficient than the self-preparedα-Fe2O3nanoparticles. At the same time, the photocatalyzer was recyclable by applying an appropriate magnetic field.

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Size-dependent critical transition in the origin of light emission from core–shell Si–SiO2 nanoparticles

Journal of Materials Chemistry C ◽

10.1039/d0tc01442g ◽

2020 ◽

Vol 8 (26) ◽

pp. 9012-9023

Author(s):

Bruno P. Falcão ◽

Joaquim P. Leitão ◽

Maria R. Soares ◽

Joana Rodrigues ◽

Lídia Ricardo ◽

...

Keyword(s):

Light Emission ◽

Sio2 Nanoparticles ◽

Core Shell ◽

Critical Transition ◽

Shell Nanoparticles ◽

Size Dependent ◽

The Core ◽

Core Shell Nanoparticles ◽

Small Nanoparticles

Here, it is established that the origin of the photoluminescence of Si–SiO2 core–shell nanoparticles is strongly size-dependent, with large nanoparticles emitting mostly from the core, whereas small nanoparticles emit predominantly from the shell.

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Aptamer based surface enhanced Raman scattering detection of adenosine using various core sizes of Au–Ag core–shell nanoparticles

RSC Advances ◽

10.1039/c4ra02762k ◽

2014 ◽

Vol 4 (50) ◽

pp. 26251-26257 ◽

Cited By ~ 12

Author(s):

Fu-Hsiang Ko ◽

Yu-Cheng Chang

Keyword(s):

Raman Scattering ◽

Core Shell ◽

Silicon Substrates ◽

Shell Nanoparticles ◽

Au Nps ◽

Surface Enhanced ◽

Surface Enhanced Raman ◽

Enhanced Raman Scattering ◽

Core Shell Nanoparticles ◽

Growth Approach

The combination of the varied sizes of Au NPs and seeding growth approach can be exploited to control the sizes of Au–Ag core–shell NPs. The silicon substrates with self-assembled Au–Ag core–shell NPs can be used to detect adenosine by a structures-switch aptamer.

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