Properties of Bimetallic Core-Shell Nanoclusters

Volume 2: Computer Technology and Bolted Joints ◽

10.1115/pvp2012-78242 ◽

2012 ◽

Author(s):

Y. H. Park ◽

I. Hijazi

Keyword(s):

Electronic Structures ◽

Degrees Of Freedom ◽

Shell Structures ◽

Core Shell ◽

Half Metallic ◽

Bimetallic Nanoclusters ◽

Half Metal ◽

Energetic Stability ◽

Composition Modification ◽

Device Applications

Gold (Au) and copper (Cu) materials and their combination exhibit the most of the main wanted properties in nanostructures. Nobel metals such as Au and Cu have important magnetic, electronic, optical, catalytic and thermal properties. Compared to monometallic clusters, bimetallic nanoclusters have more degrees of freedom and distinct properties due to the presence of two different metals. It is also well known that the shape, surface topography, segregation, mixing, ordering, energetic stability, and electronic structures of bimetallic nanoclusters may depend significantly on their composition. This affords greater opportunity to control their properties by modifying composition as well as size. In this work, we investigated magnetic and electronic properties for AuCu bimetallic core-shell structures and showed that the CuAu coreshell can have a half-metal property through chemical composition modification. Half-metallic ferromagnets attract increasing research interest as potential materials for spintronic device applications.

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First-principles study on the electronic structures of β-SiC/carbon nanotube core-shell structures

Acta Physica Sinica ◽

10.7498/aps.62.107101 ◽

2013 ◽

Vol 62 (10) ◽

pp. 107101

Author(s):

Zou Xiao-Cui ◽

Wu Mu-Sheng ◽

Liu Gang ◽

Ouyang Chu-Ying ◽

Xu Bo

Keyword(s):

Carbon Nanotube ◽

First Principles ◽

Electronic Structures ◽

Shell Structures ◽

Core Shell ◽

First Principles Study

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Site-Preference, Electronic, Magnetic, and Half-Metal Properties of Full-Heusler Sc2VGe and a Discussion on the Uniform Strain and Tetragonal Deformation Effects

Crystals ◽

10.3390/cryst9090445 ◽

2019 ◽

Vol 9 (9) ◽

pp. 445 ◽

Cited By ~ 2

Author(s):

Zongbin Chen ◽

Heju Xu ◽

Yongchun Gao ◽

Xiaotian Wang ◽

Tie Yang

Keyword(s):

Electronic Structures ◽

Physical Nature ◽

Lattice Parameter ◽

Uniform Strain ◽

Site Preference ◽

Half Metallic ◽

Half Metal ◽

Equilibrium Lattice Parameter ◽

Metal Properties ◽

Full Heusler

A hypothetical full-Heusler alloy, Sc2VGe, was analyzed, and the comparison between the XA and L21 structures of this alloy was studied based on first-principles calculations. We found that the L21-type structure was more stable than the XA one. Further, the electronic structures of both types of structure were also investigated based on the calculated band structures. Results show that the physical nature of L21-type Sc2VGe is metallic; however, XA-type Sc2VGe is a half-metal (HM) with 100% spin polarization. When XA-type Sc2VGe is at its equilibrium lattice parameter, its total magnetic moment is 3 μ B , and its total magnetism is mainly attributed to the V atom. The effects of uniform strain and tetragonal lattice distortion on the electronic structures and half-metallic states of XA-type Sc2VGe were also studied. All the aforementioned results indicate that XA-type Sc2VGe would be an ideal candidate for spintronics studies, such as spin generation and injection.

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Current Status of Magnetite-Based Core@Shell Structures for Diagnosis and Therapy in Oncology Short running title: Biomedical Applications of Magnetite@Shell Structures

Current Pharmaceutical Design ◽

10.2174/1381612821666150917093543 ◽

2015 ◽

Vol 21 (37) ◽

pp. 5417-5433 ◽

Cited By ~ 8

Author(s):

Ângela Andrade ◽

José Fabris ◽

Rosana Domingues ◽

Márcio Pereira

Keyword(s):

Biomedical Applications ◽

Shell Structures ◽

Current Status ◽

Core Shell ◽

Diagnosis And Therapy

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Designing active mats based on cellulose acetate/polycaprolactone core/shell structures with different release kinetics

Carbohydrate Polymers ◽

10.1016/j.carbpol.2021.117849 ◽

2021 ◽

Vol 261 ◽

pp. 117849 ◽

Cited By ~ 1

Author(s):

Adrián Rojas ◽

Eliezer Velásquez ◽

Constanza Piña ◽

María José Galotto ◽

Carol López de Dicastillo

Keyword(s):

Cellulose Acetate ◽

Release Kinetics ◽

Shell Structures ◽

Core Shell

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Microscopic Deformation Behavior and Crack Resistance Mechanism of Core–Shell Structures in Highly‐Toughened PP/PA6/EPDM‐g‐MA Ternary Blends

Macromolecular Materials and Engineering ◽

10.1002/mame.202100174 ◽

2021 ◽

pp. 2100174

Author(s):

Majid Mehrabi‐Mazidi ◽

Mir Karim Razavi‐Aghjeh

Keyword(s):

Crack Resistance ◽

Deformation Behavior ◽

Resistance Mechanism ◽

Shell Structures ◽

Core Shell ◽

Ternary Blends ◽

Microscopic Deformation

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A SERS Study of Charge Transfer Process in Au Nanorod–MBA@Cu2O Assemblies: Effect of Length to Diameter Ratio of Au Nanorods

Nanomaterials ◽

10.3390/nano11040867 ◽

2021 ◽

Vol 11 (4) ◽

pp. 867

Author(s):

Lin Guo ◽

Zhu Mao ◽

Sila Jin ◽

Lin Zhu ◽

Junqi Zhao ◽

...

Keyword(s):

Charge Transfer ◽

Shell Structure ◽

Shell Structures ◽

Core Shell ◽

Absorption Bands ◽

Au Nanorods ◽

The Core ◽

Band Position ◽

Surface Enhanced Raman ◽

Core Shell Structure

Surface-enhanced Raman scattering (SERS) is a powerful tool in charge transfer (CT) process research. By analyzing the relative intensity of the characteristic bands in the bridging molecules, one can obtain detailed information about the CT between two materials. Herein, we synthesized a series of Au nanorods (NRs) with different length-to-diameter ratios (L/Ds) and used these Au NRs to prepare a series of core–shell structures with the same Cu2O thicknesses to form Au NR–4-mercaptobenzoic acid (MBA)@Cu2O core–shell structures. Surface plasmon resonance (SPR) absorption bands were adjusted by tuning the L/Ds of Au NR cores in these assemblies. SERS spectra of the core-shell structure were obtained under 633 and 785 nm laser excitations, and on the basis of the differences in the relative band strengths of these SERS spectra detected with the as-synthesized assemblies, we calculated the CT degree of the core–shell structure. We explored whether the Cu2O conduction band and valence band position and the SPR absorption band position together affect the CT process in the core–shell structure. In this work, we found that the specific surface area of the Au NRs could influence the CT process in Au NR–MBA@Cu2O core–shell structures, which has rarely been discussed before.

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