An investigation of the size-dependent cohesive energy and the structural stability of spherical metallic nanoparticles

Size-dependent melting temperature of metallic nanoparticles is studied theoretically based on cohesive energy. Three factors are introduced in the present model. The k factor, i.e. efficiency of space filling of crystal lattice is defined as the ratio between the volume of the atoms in a crystal cell and that of the crystal cell. The β factor is defined as the ratio between the cohesive energy of surface atom and interior atom of a crystal. The qs factor represents the packing fraction on a surface crystalline plane. Considering the β, qs and k factors, the relationship between melting temperature and nanoparticle size is discussed. The obtained model is compared with the reported experimental data and the other models.

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Size-dependent cohesive energy, melting temperature, and Debye temperature of spherical metallic nanoparticles

The Physics of Metals and Metallography ◽

10.1134/s0031918x17060102 ◽

2017 ◽

Vol 118 (6) ◽

pp. 528-534 ◽

Cited By ~ 10

Author(s):

Y. D. Qu ◽

X. L. Liang ◽

X. Q. Kong ◽

W. J. Zhang

Keyword(s):

Debye Temperature ◽

Melting Temperature ◽

Cohesive Energy ◽

Metallic Nanoparticles ◽

Size Dependent

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THE EFFECT OF MIE-TYPE POTENTIAL RANGE ON THE COHESIVE ENERGY OF METALLIC NANOPARTICLES

International Journal of Nanoscience ◽

10.1142/s0219581x07005048 ◽

2007 ◽

Vol 06 (06) ◽

pp. 461-466 ◽

Cited By ~ 6

Author(s):

T. BARAKAT ◽

O. M. Al-DOSSARY ◽

A. A. ALHARBI

Keyword(s):

Cohesive Energy ◽

Metallic Nanoparticles ◽

Interatomic Potential ◽

Potential Range ◽

Size Dependent ◽

Dependent Potential ◽

Experimental Values ◽

The Right ◽

Potential Parameters ◽

Type Potential

We investigate the effect of Mie-type potential range on the cohesive energy of metallic nanoparticles using the size-dependent potential parameters method. The predicted cohesive energy for different cubic structures is observed to decrease with decreasing the particle size, and increase with decreasing the range of the interatomic potential, a result which is in the right direction at least to predict the experimental values of Molybdenum and Tungsten nanoparticles.

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Nonlocal and Size-Dependent Dielectric Function for Plasmonic Nanoparticles

Applied Sciences ◽

10.3390/app9153083 ◽

2019 ◽

Vol 9 (15) ◽

pp. 3083

Author(s):

Kai-Jian Huang ◽

Shui-Jie Qin ◽

Zheng-Ping Zhang ◽

Zhao Ding ◽

Zhong-Chen Bai

Keyword(s):

Metallic Nanoparticles ◽

High Efficiency ◽

Finite Size ◽

Plasmonic Nanostructures ◽

Accurate Analysis ◽

Finite Size Effects ◽

Size Dependent ◽

Quantum Size ◽

The Impact ◽

Electron Energy Loss

We develop a theoretical approach to investigate the impact that nonlocal and finite-size effects have on the dielectric response of plasmonic nanostructures. Through simulations, comprehensive comparisons of the electron energy loss spectroscopy (EELS) and the optical performance are discussed for a gold spherical dimer system in terms of different dielectric models. Our study offers a paradigm of high efficiency compatible dielectric theoretical framework for accounting the metallic nanoparticles behavior combining local, nonlocal and size-dependent effects in broader energy and size ranges. The results of accurate analysis and simulation for these effects unveil the weight and the evolution of both surface and bulk plasmons vibrational mechanisms, which are important for further understanding the electrodynamics properties of structures at the nanoscale. Particularly, our method can be extended to other plasmonic nanostructures where quantum-size or strongly interacting effects are likely to play an important role.

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