Template-assisted nano-patterning of magnetic core–shell particles in gradient fields

Controlling the assembly of colloidal magnetic core–shell particles into patterned monolayer structures with nanoscale feature resolution using soft-magnetic template elements.

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Catalytic Performance of a Magnetic Core-Shell Iron(II) C-Scorpionate under Unconventional Oxidation Conditions

Nanomaterials ◽

10.3390/nano10112111 ◽

2020 ◽

Vol 10 (11) ◽

pp. 2111

Author(s):

Inês A. S. Matias ◽

Ana P. C. Ribeiro ◽

Ana M. Ferraria ◽

Ana M. Botelho do Rego ◽

Luísa M. D. R. S. Martins

Keyword(s):

Alternative Energy ◽

Alcohol Oxidation ◽

Catalytic Performance ◽

Magnetic Core ◽

Core Shell ◽

Secondary Alcohols ◽

Alternative Energy Sources ◽

Metallic Complex ◽

Shell Particles ◽

First Time

For the first time, herein is reported the use of a magnetic core-shell support for a C-scorpionate metallic complex. The prepared hybrid material, that consists on the C-scorpionate iron(II) complex [FeCl2{κ3-HC(pz)3}] (pz, pyrazolyl) immobilized at magnetic core-shell particles (Fe3O4/TiO2), was tested as catalyst for the oxidation of secondary alcohols using the model substrate 1-phenylethanol. Moreover, the application of alternative energy sources (e.g., ultrasounds, microwaves, mechanical or thermal) for the peroxidative alcohol oxidation using the magnetic heterogenized iron(II) scorpionate led to different/unusual outcomes that are presented and discussed.

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Synthesis, microstructure and magnetic properties of Fe3Si0.7Al0.3@SiO2 core–shell particles and Fe3Si/Al2O3 soft magnetic composite core

Journal of Solid State Chemistry ◽

10.1016/j.jssc.2015.08.016 ◽

2015 ◽

Vol 231 ◽

pp. 152-158 ◽

Cited By ~ 19

Author(s):

Jian Wang ◽

Xi’an Fan ◽

Zhaoyang Wu ◽

Guangqiang Li

Keyword(s):

Magnetic Properties ◽

Core Shell ◽

Magnetic Composite ◽

Soft Magnetic ◽

Soft Magnetic Composite ◽

Shell Particles ◽

Microstructure And Magnetic Properties

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Synthesis and Microwave Absorbing Properties of Ni/SiO2 Core/Shell Particles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.160-162.945 ◽

2010 ◽

Vol 160-162 ◽

pp. 945-950

Author(s):

Bo Chong Wang ◽

Tao Wang ◽

Liang Qiao ◽

Fa Shen Li

Keyword(s):

Impedance Match ◽

Core Shell ◽

Frequency Range ◽

Soft Magnetic ◽

Absorption Properties ◽

Microwave Absorption Properties ◽

Microwave Absorbing Properties ◽

Hydrolysis Method ◽

Microwave Absorbing ◽

Shell Particles

In this paper, we report on the microwave absorbing properties of the Ni/SiO2 core/shell soft magnetic material which was synthesized by the tetraethyl orthosilicate (TEOS) hydrolysis method. The SEM patterns were shown that the particles of Ni/SiO2 were more dispersed and homogeneous. Microwave absorbing properties were measured in the range of 0.1–18 GHz. A reflection loss (RL) exceeding −20 dB in the frequency range of 2.6–8.9 GHz was achieved for an absorber thickness of 2.0–5.6 mm, and an optimal RL of −49.5 dB was obtained at 4.4 GHz for the thickness of 3.5 mm. The good microwave absorption properties resulted from a proper impedance match as a consequence of the insulator SiO2 around Ni particles.

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