SIZE-DEPENDENT MELTING POINT OF NANOPARTICLES BASED ON BOND NUMBER CALCULATION

2015 ◽  
Vol 2 (4) ◽  
pp. 17-22 ◽  
Author(s):  
S. Zhang ◽  
L. Zhang
Keyword(s):  
Melting Point ◽  
Bond Number ◽  
Size Dependent

Size-dependent melting point of nanoparticles based on bond number calculation

2013 ◽  
Vol 137 (3) ◽  
pp. 1007-1011 ◽  
Author(s):  
H. Li ◽  
P.D. Han ◽  
X.B. Zhang ◽  
M. Li
Keyword(s):  
Melting Point ◽  
Bond Number ◽  
Size Dependent

scholarly journals Phase diagram prediction and particle characterization of Sn-Ag nano alloy for low melting point lead-free solders

2012 ◽  
Vol 48 (3) ◽  
pp. 419-425 ◽  
Author(s):  
J. Sopousek ◽  
J. Vrestal ◽  
A. Zemanova ◽  
J. Bursi
Keyword(s):  
Phase Diagram ◽  
Melting Point ◽  
Inductively Coupled Plasma ◽  
Fine Powder ◽  
Melting Point Depression ◽  
Electron Microscopic ◽  
Inductively Coupled ◽  
Size Dependent ◽  
Powder Samples ◽  
Wet Synthesis

SnAg nanoparticles (SnAg NPs) were prepared by wet synthesis. The chemical composition of the SnAg NPs was obtained by inductively coupled plasma - mass spectrometry. The prepared fine powder samples were characterized by electron microscopic technique (SEM) and thermal analysis (DSC). The nanoparticles with different size were obtained. The size dependent melting point depression (MPD) of the SnAg NPs was determined experimentally. The size dependent phase diagram of the SnAg alloy was also calculated using CALPHAD method, which has been extended to describe the surface energy of SnAg nanoparticles. The same approach was used for SnAg eutectic MPD calculations. The own experimental and theoretical results were compared with the data of the other authors. The satisfactory agreement was found.

Size-dependent melting point of noble metals

2003 ◽  
Vol 82 (1) ◽  
pp. 225-227 ◽  
Author(s):  
Q Jiang ◽  
S Zhang ◽  
M Zhao
Keyword(s):  
Melting Point ◽  
Noble Metals ◽  
Size Dependent

Size Dependent Bond Length of Metallic Clusters by Considering Bond Number

2016 ◽  
Vol 850 ◽  
pp. 314-318
Author(s):  
Hui Li ◽  
Hao Jie Xiao ◽  
Jiang Wang ◽  
Hai Xia Zhang ◽  
Hai Cheng Xuan ◽  
...  
Keyword(s):  
Bond Length ◽  
Bond Number ◽  
Single Bond ◽  
Metallic Clusters ◽  
Structure Relaxation ◽  
Atomic Structures ◽  
Size Dependent ◽  
Model Free ◽  
Theoretical Predictions ◽  
Ag Clusters

In this study, size-dependent bond length of metallic clusters is established by introducing bond number. This model, free of any adjustable parameters, can be utilized to predict the change rule of bond length with size. If the atomic structure of a cluster is known, the size and shape-dependent bond number are obtained. The cubooctahedral structure is taken for simplicity to describe the shape and geometric characteristics of metallic clusters. It is found that the bond length decreases with the decreased size of metallic clusters, which is due to the structure relaxation and enhanced single bond energy. The theoretical predictions are consistent with the evidences of the simulations for Au and Ag clusters. This confirms the validity of taking cubooctahedron structure, even if the simulated Au and Ag clusters are not cuboctahedron ones. This can be expected to other metallic clusters even with other atomic structures.

Ellipsometric Study on Size-Dependent Melting Point of Nanometer-Sized Indium Particles

2016 ◽  
Vol 120 (19) ◽  
pp. 10686-10690 ◽  
Author(s):  
Jinbo Zhang ◽  
Yuxiang Zheng ◽  
Dongdong Zhao ◽  
Shangdong Yang ◽  
Liao Yang ◽  
...  
Keyword(s):  
Melting Point ◽  
Size Dependent ◽  
Ellipsometric Study

scholarly journals Size-dependent melting point depression of nickel nanoparticles

2020 ◽  
Vol 2 (6) ◽  
pp. 2347-2351 ◽  
Author(s):  
Alexander van Teijlingen ◽  
Sean A. Davis ◽  
Simon R. Hall
Keyword(s):  
Melting Point ◽  
Molecular Dynamic ◽  
Nickel Nanoparticles ◽  
Melting Point Depression ◽  
Size Dependent

The melting point depression as a function of size has not been determined experimentally (orange line) for nickel before. This figure shows our results compared with molecular dynamic (blue) and thermodynamic (black, red, green) models.

Size-dependent Raman shift of semiconductor nanomaterials determined using bond number and strength

2017 ◽  
Vol 19 (41) ◽  
pp. 28056-28062 ◽  
Author(s):  
H. Li ◽  
X. W. He ◽  
H. J. Xiao ◽  
H. N. Du ◽  
J. Wang ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Bond Number ◽  
Raman Shift ◽  
Size Dependent ◽  
Semiconductor Nanomaterials

Significant variations in Raman shifts with decreasing material size,D, have been detected in Raman spectroscopy.

Size dependent thermal vibrations and melting in nanocrystals

1994 ◽  
Vol 9 (5) ◽  
pp. 1307-1314 ◽  
Author(s):  
Frank G. Shi
Keyword(s):  
Melting Point ◽  
Simple Model ◽  
Melting Temperature ◽  
Present Model ◽  
Semiconductor Nanocrystals ◽  
Quantitative Agreement ◽  
Bulk Crystal ◽  
Size Dependent ◽  
Measurable Parameter ◽  
Thermal Vibrations

A simple model for the size-dependent amplitude of the atomic thermal vibrations of a nanocrystal is presented which leads to the development of a model for the size dependent melting temperature in nanocrystals on the basis of Lindemann's criterion. The two models are in terms of a directly measurable parameter for the corresponding bulk crystal, i.e., the ratio between the amplitude of thermal vibrations for surface atoms and that for interior ones. It is shown that the present model for the melting temperature offers not only a qualitative but even an excellent quantitative agreement with the experimentally observed size-dependent superheating, as well as melting point suppression in both the supported and embedded metallic and semiconductor nanocrystals.

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