Molecular dynamics simulations of the effects of truncation of the Taylor expansion of the potential energy on the thermodynamic properties of a crystal

1996 ◽  
Vol 105 (10) ◽  
pp. 4185-4190 ◽  
Author(s):  
Daniel J. Lacks ◽  
Ramesh C. Shukla
Keyword(s):  
Molecular Dynamics ◽  
Thermodynamic Properties ◽  
Potential Energy ◽  
Molecular Dynamics Simulations ◽  
Taylor Expansion ◽  
Dynamics Simulations

Melting at Mg/Al interface in Mg-Al-Mg nanolayer by molecular dynamics simulations

2021 ◽  
Author(s):  
Xue-Qi Lv ◽  
Xiong-Ying Li
Keyword(s):  
Molecular Dynamics ◽  
Heat Capacity ◽  
Distribution Function ◽  
Potential Energy ◽  
Density Distribution ◽  
Molecular Dynamics Simulations ◽  
Regional Research ◽  
Melting Temperatures ◽  
Essential Step ◽  
Dynamics Simulations

Abstract The melting at the magnesium/aluminum (Mg/Al) interface is an essential step during the fabrications of Mg-Al structural materials and biomaterials. We carried out molecular dynamics simulations on the melting at the Mg/Al interface in a Mg-Al-Mg nanolayer via analyzing the changes of average atomic potential energy, Lindemann index, heat capacity, atomic density distribution and radial distribution function with temperature. The melting temperatures (T m) of the nanolayer and the slabs near the interface are significantly sensitive to the heating rate (v h) over the range of v h≤4.0 K/ps. The distance (d) range in which the interface affects the melting of the slabs is predicted to be (-98.2, 89.9) Å at v h→0, if the interface is put at d=0 and Mg (Al) is located at the left (right) side of the interface. The (T m) of the Mg (Al) slab just near the interface (e.g., d=4.0 Å) is predicted to be 926.8 K (926.6 K) at v h→0, with 36.9 K (37.1 K) below 963.7 K for the nanolayer. These results highlight the importance of regional research on the melting at an interface in the nanolayers consisting of two different metals.

scholarly journals A [1 + 2] cycloaddition instead of usual [2 + 3] cycloaddition between the B12N12 cluster and methyl azide: Potential energy surface calculations and Born–Oppenheimer molecular dynamics simulations

2020 ◽  
Vol 45 ◽  
pp. 146867831990058
Author(s):  
Parvaneh Pakravan ◽  
Seyyed Amir Siadati
Keyword(s):  
Molecular Dynamics ◽  
Potential Energy ◽  
Potential Energy Surface ◽  
Molecular Dynamics Simulations ◽  
Energy Surface ◽  
Cycloaddition Reaction ◽  
Reliable Data ◽  
Reaction Channel ◽  
Dynamics Simulations

We have examined here the possibility of functionalization of the B12N12 cluster by methyl azide by means of a [2 + 3] cycloaddition reaction in analogy with the spontaneous functionalization of C20 fullerene using the same reaction. To achieve more reliable data, all possible interactions at different positions and orientations were considered by reaction channel study and potential energy surface calculations. Also, Born–Oppenheimer molecular dynamics simulations were used to find probable species which could emerge during the reactions.

INITIAL ROLL GUIDED STRUCTURAL TRANSITION OF GRAPHENE

NANO ◽  
2014 ◽  
Vol 09 (02) ◽  
pp. 1450024
Author(s):  
Y. F. LI
Keyword(s):  
Molecular Dynamics ◽  
Potential Energy ◽  
Molecular Dynamics Simulations ◽  
Graphene Layer ◽  
Structural Transition ◽  
Small Disturbance ◽  
Combined Action ◽  
Stacking Effect ◽  
Simulation Input ◽  
Dynamics Simulations

Molecular dynamics simulations have been performed to study the initial roll guided structural transition of graphene. The flat graphene is thermodynamic metastable and small disturbance can strike its balance and lead to fold. An initial roll at one end causes the graphene layer to transform into double-fold, multi-fold and scroll spontaneously, depending on the size of the initial roll. This unique phenomenon results from the combined action of the van der Waals interaction and the π–π stacking effect. The potential energy of the final structures decreases with the increase of compact level. This study provides crucial simulation input to help guide to designing the required graphene-based nanostructures.

Prediction of thermodynamic properties for fluid nitrogen with molecular dynamics simulations

1996 ◽  
Vol 17 (6) ◽  
pp. 1349-1363 ◽  
Author(s):  
C. Kriebel ◽  
A. M�ller ◽  
M. Mecke ◽  
J. Winkelmann ◽  
J. Fischer
Keyword(s):  
Molecular Dynamics ◽  
Thermodynamic Properties ◽  
Molecular Dynamics Simulations ◽  
Dynamics Simulations

Thermodynamic properties of methane/water interface predicted by molecular dynamics simulations

2011 ◽  
Vol 134 (14) ◽  
pp. 144702 ◽  
Author(s):  
Ryuji Sakamaki ◽  
Amadeu K. Sum ◽  
Tetsu Narumi ◽  
Ryo Ohmura ◽  
Kenji Yasuoka
Keyword(s):  
Molecular Dynamics ◽  
Thermodynamic Properties ◽  
Molecular Dynamics Simulations ◽  
Water Interface ◽  
Dynamics Simulations
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