Results 21 to 30 of about 1,073,150 (315)

Tailoring characteristic thermal stability of Ni-Au binary nanocrystals via structure and composition engineering: theoretical insights into structural evolution and atomic inter-diffusion

AIP Advances, 2014
We report on the structural evolution and atomic inter-diffusion characteristics of the bimetallic Ni-Au nanocrystals (NCs) by molecular dynamics simulations studies. Our results reveal that the thermal stability dynamics of Ni-Au NCs strongly depends on
Bangquan Li, Guozhong Xing, Hailong Wang, Rongming Wang   +3 more
doaj   +1 more source

Synthesis of Au@Pt Core—Shell Nanoparticles as Efficient Electrocatalyst for Methanol Electro-Oxidation

Nanomaterials, 2019
Bimetallic Au@Pt nanoparticles (NPs) with Pt monolayer shell are of much interest for applications in heterogeneous catalysts because of enhanced catalytic activity and very low Pt-utilization.
América Higareda, Siva Kumar-Krishnan, Amado F. García-Ruiz, José Maya-Cornejo, José L. Lopez-Miranda, Daniel Bahena, Gerardo Rosas, Ramiro Pérez, Rodrigo Esparza   +8 more
doaj   +1 more source

Atomic ionization at annihilation of positrons emitted at β+-decay [PDF]

Ядерна фізика та енергетика, 2011
Atomic ionization at annihilation of positron with another electron of daughter's atom at +-decay is studied. Processes of the different atomic shells ionization at annihilation of positron, emitted at +-decay, with K-electron of daughter's atom are ...
S. N. Fedotkin
doaj  

Charge radii of atomic nuclei and shell effects

Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2022
Background. The root-mean-square charge radii are the important characteristics of atomic nuclei which might be measured experimentally. In this research, we study the experimental data on the root-mean-square charge radii of the spherical nuclei ...
M.V. Chushnyakova, I.I. Gonchar, E.V. Kulik   +2 more
doaj   +1 more source

Atomic Simulations of Si@Ge and Ge@Si Nanowires for Mechanical and Thermal Properties

Crystals, 2022
Molecular dynamics simulations using Tersoff potential were performed in order to study the evolution of the atomic packing structures, loading states on the atoms, and tensile tests, as well as the thermal properties of Si/Ge core–shell nanowires with ...
Dandan Zhao, Yang Cui, Jing Li, Lin Zhang   +3 more
doaj   +1 more source

Influence of the nuclear electric field on processes of annihilation of positrons emitted at β+-decay [PDF]

Ядерна фізика та енергетика, 2014
The process of atomic shell ionization during annihilation of positron, emitted at β+-decay, with K-electron of daughter's atom is considered. The role of nuclear Coulomb field at calculation of the probability of this process is investigated.
S. N. Fedotkin
doaj  

In situ atomic-scale observation of oxygen-driven core-shell formation in Pt3Co nanoparticles

Nature Communications, 2017
Core-shell platinum alloy nanoparticles are promising catalysts for oxygen reduction, however a deeper understanding of core-shell formation is still required. Here the authors report oxygen-driven formation of core-shell Pt3Co nanoparticles, seen at the
Sheng Dai, Yuan You, Shuyi Zhang, Wei Cai, Mingjie Xu, Lin Xie, Ruqian Wu, George W. Graham, Xiaoqing Pan   +8 more
doaj   +1 more source

Emerging Concepts in Nuclear Structure Based on the Shell Model

Physics, 2022
Some emerging concepts of nuclear structure are overviewed. (i) Background: the many-body quantum structure of atomic nucleus, a complex system comprising protons and neutrons (called nucleons collectively), has been studied largely based on the idea of ...
Takaharu Otsuka
doaj   +1 more source

Size effect on atomic structure in low-dimensional Cu-Zr amorphous systems

Scientific Reports, 2017
The size effect on atomic structure of a Cu64Zr36 amorphous system, including zero-dimensional small-size amorphous particles (SSAPs) and two-dimensional small-size amorphous films (SSAFs) together with bulk sample was investigated by molecular dynamics ...
W. B. Zhang, J. Liu, S. H. Lu, H. Zhang, H. Wang, X. D. Wang, Q. P. Cao, D. X. Zhang, J. Z. Jiang   +8 more
doaj   +1 more source

Synthesis of Ag-ZnO core-shell nanoparticles with enhanced photocatalytic activity through atomic layer deposition

Materials & Design, 2019
Herein, Ag-ZnO core-shell nanoparticles (NPs) with enhanced photocatalytic activity were prepared by coating Ag metal cores with ZnO semiconductor shells through atomic layer deposition (ALD).
Sejong Seong, In-Sung Park, Yong Chan Jung, Taehoon Lee, Seon Yong Kim, Ji Soo Park, Jae-Hyeon Ko, Jinho Ahn   +7 more
doaj   +1 more source