The binding energy and generalized stacking-fault energy (GSFE) are two critical interface properties of two dimensional layered materials, and it is still unclear how neighboring layers affect the interface energy of...The binding energy and generalized stacking-fault energy (GSFE) are two critical interface properties of two dimensional layered materials, and it is still unclear how neighboring layers affect the interface energy of adjacent layers. Here, we investigate the effect of neighboring layers by comparing the differences of binding energy and GSFE between trilayer heterostructures (graphene/graphene/graphene, graphene/graphene/boron nitride,boron nitride/graphene/boron nitride) and bilayer heterostructures (graphene/graphene,graphene/boron nitride) using density functional theory. The binding energy of the adjacent layers changes from -2.3% to 22.55% due to the effect of neighboring layer, with a very small change of the interlayer distance. Neighboring layers also make a change from -2% to 10% change the GSFE, depending on the property of the interface between adjacent layers. In addition, a new simple expression is proven to describe the GSFE landscape of graphene-like structure with high accuracy.展开更多
Gas disaster is one of the five major disasters in coal mine. Gas drainage can not only ensure the safe production of working face, but also turn gas into waste and improve the economic benefits of mine. Over the year...Gas disaster is one of the five major disasters in coal mine. Gas drainage can not only ensure the safe production of working face, but also turn gas into waste and improve the economic benefits of mine. Over the years, China has made in-depth research and application of coal seam gas extraction technology, and achieved fruitful results. However, due to the complex geological conditions of coal mines, the occurrence of coal seams and gas disasters in different mines are quite different, so a scientific, feasible, economical and reasonable drainage scheme should be designed according to specific conditions. This paper studies the application of gas drainage technology in fully mechanized coal face under the influence of coal mine adjacent layers, which has good guiding significance.展开更多
文摘The binding energy and generalized stacking-fault energy (GSFE) are two critical interface properties of two dimensional layered materials, and it is still unclear how neighboring layers affect the interface energy of adjacent layers. Here, we investigate the effect of neighboring layers by comparing the differences of binding energy and GSFE between trilayer heterostructures (graphene/graphene/graphene, graphene/graphene/boron nitride,boron nitride/graphene/boron nitride) and bilayer heterostructures (graphene/graphene,graphene/boron nitride) using density functional theory. The binding energy of the adjacent layers changes from -2.3% to 22.55% due to the effect of neighboring layer, with a very small change of the interlayer distance. Neighboring layers also make a change from -2% to 10% change the GSFE, depending on the property of the interface between adjacent layers. In addition, a new simple expression is proven to describe the GSFE landscape of graphene-like structure with high accuracy.
文摘Gas disaster is one of the five major disasters in coal mine. Gas drainage can not only ensure the safe production of working face, but also turn gas into waste and improve the economic benefits of mine. Over the years, China has made in-depth research and application of coal seam gas extraction technology, and achieved fruitful results. However, due to the complex geological conditions of coal mines, the occurrence of coal seams and gas disasters in different mines are quite different, so a scientific, feasible, economical and reasonable drainage scheme should be designed according to specific conditions. This paper studies the application of gas drainage technology in fully mechanized coal face under the influence of coal mine adjacent layers, which has good guiding significance.
