scholarly journals First-principles study of van der Waals interactions and lattice mismatch atMoS2/metalinterfaces

2016 ◽  
Vol 93 (8) ◽  
Author(s):  
Mojtaba Farmanbar ◽  
Geert Brocks
Keyword(s):  
First Principles ◽  
Lattice Mismatch ◽  
Van Der Waals ◽  
Van Der Waals Interactions ◽  
First Principles Study

scholarly journals Effect of van der Waals interactions on the adhesion strength at the interface of the hydroxyapatite–titanium biocomposite: a first-principles study

RSC Advances ◽  
2020 ◽  
Vol 10 (62) ◽  
pp. 37800-37805
Author(s):  
Irina Yu. Grubova ◽  
Maria A. Surmeneva ◽  
Roman A. Surmenev ◽  
Erik C. Neyts
Keyword(s):  
Adhesion Strength ◽  
Significant Role ◽  
First Principles ◽  
Bonding Strength ◽  
Van Der Waals ◽  
Molecular Simulations ◽  
Van Der Waals Interactions ◽  
Hydroxyapatite Coating ◽  
Dispersion Interactions ◽  
First Principles Study

Dispersion interactions play a significant role in altering the bonding strength of the hydroxyapatite coating to the substrate, and such interactions is critical in molecular simulations.

scholarly journals First-Principles Study on Graphene/Mg2Si Interface of Selective Laser Melting Graphene/Aluminum Matrix Composites

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 941
Author(s):  
Zhanyong Zhao ◽  
Shijie Chang ◽  
Jie Wang ◽  
Peikang Bai ◽  
Wenbo Du ◽  
...  
Keyword(s):  
Interfacial Energy ◽  
First Principles ◽  
Lattice Mismatch ◽  
Van Der Waals ◽  
Aluminum Matrix ◽  
Van Der Waals Force ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Charge Density Difference ◽  
Interface Charge

The bonding strength of a Gr/Mg2Si interface was calculated by first principles. Graphene can form a stable, completely coherent interface with Mg2Si. When the (0001) Gr/(001) Mg2Si crystal plane is combined, the mismatch degree is 5.394%, which conforms to the two-dimensional lattice mismatch theory. At the interface between Gr/Mg2Si, chemical bonds were not formed, there was only a strong van der Waals force; the interfaces composed of three low index surfaces (001), (011) and (111) of Mg2Si and Gr (0001) have smaller interfacial adhesion work and larger interfacial energy, the interfacial energy of Gr/Mg2Si is much larger than that of α-Al/Al melt and Gr/Al interfacial (0.15 J/m2, 0.16 J/m2), and the interface distance of a stable interface is larger than the bond length of a chemical bond. The interface charge density difference diagram and density of states curve show that there is only strong van der Waals force in a Gr/Mg2Si interface. Therefore, when the Gr/AlSi10Mg composite is stressed and deformed, the Gr/Mg2Si interface in the composite is easy to separate and become the crack propagation source. The Gr/Mg2Si interface should be avoided in the preparation of Gr/AlSi10Mg composite.

First-principles study on photoelectric and transport properties of CsXBr3 (X = Ge, Sn) and blue phosphorus van der Waals heterojunctions

2021 ◽  
Vol 129 (3) ◽  
pp. 035302
Author(s):  
Mengli Yao ◽  
Xiaojiao Zhang ◽  
Tian Wu ◽  
Biao Liu ◽  
Mingjun Li ◽  
...  
Keyword(s):  
Transport Properties ◽  
First Principles ◽  
Van Der Waals ◽  
First Principles Study
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