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First-principles investigation on the bonding mechanism between graphyne and the (111) surface of Cu, Ag and Au
Sun,Shenghui1,2; Zhang,Xin1,2; Wang,Shaoqing1
2020-06-01
Source PublicationMaterials Research Express
Volume7Issue:6
AbstractAbstract A series of adsorption configurations with less than 2% lattice mismatch of graphyne adsorbed at different sites on the (111) surface of Cu, Ag and Au are obtained by a systematic rotation of the graphyne sheet. Besides, all the non-equivalent adsorption configurations of graphyne on metal surfaces are obtained by a structure screening method based on the translation of graphyne sheet and the calculation of the atomic overlapping area at the interface. The most stable adsorption configuration of graphyne on each metal surface is obtained by optimizing these non-equivalent adsorption configurations with a small computational cost. Then the adsorption energy, differential charge density, and partial density of states are calculated using a first-principles method in order to investigate the bonding mechanism between graphyne and the (111) surface of these three metals. The results show that the adsorption types of graphyne on the (111) surface of Cu, Ag and Au are chemisorption, chemical and physical mixed adsorption and pure physisorption, respectively. In detail, when a metal (Cu or Ag) atom is below a C atom, the C-pz orbital will interact with the s and d orbitals of the metal atom and then form a covalent bond with the metal atom. In particular, when a Cu atom lies below two carbon atoms joined by an acetylene bond, the s and d orbitals of the Cu atom hybridize with each other to form two identical sd orbitals and then form two covalent bonds with two C-pz orbitals. Our results not only provide a structure screening method for obtaining the most stable configuration with a very small lattice mismatch but also reveal the interface bonding mechanism between graphyne and metals, which will provide help for the preparation of graphyne and its application in composite materials.
Keywordfirst-principles calculation graphyne-metal interface adsorption type lattice mismatch bonding mechanism
DOI10.1088/2053-1591/ab98cd
Language英语
WOS IDIOP:2053-1591-7-6-ab98cd
PublisherIOP Publishing
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80661
Collection中国科学院金属研究所
Affiliation1.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 110016 Shenyang, Liaoning, People’s Republic of China
2.School of Materials Science and Engineering, University of Science and Technology of China, 110016 Shenyang, Liaoning, People’s Republic of China
Recommended Citation
GB/T 7714
Sun,Shenghui,Zhang,Xin,Wang,Shaoqing. First-principles investigation on the bonding mechanism between graphyne and the (111) surface of Cu, Ag and Au[J]. Materials Research Express,2020,7(6).
APA Sun,Shenghui,Zhang,Xin,&Wang,Shaoqing.(2020).First-principles investigation on the bonding mechanism between graphyne and the (111) surface of Cu, Ag and Au.Materials Research Express,7(6).
MLA Sun,Shenghui,et al."First-principles investigation on the bonding mechanism between graphyne and the (111) surface of Cu, Ag and Au".Materials Research Express 7.6(2020).
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