In this paper,a flexible modular“Tetris”microsatellite platform is studied to implement the rapid integration and assembly of microsatellites.The proposed microsatellite platform is fulfilled based on a sandwich ass...In this paper,a flexible modular“Tetris”microsatellite platform is studied to implement the rapid integration and assembly of microsatellites.The proposed microsatellite platform is fulfilled based on a sandwich assembly mode which consists of the isomorphic module structure and the standard mechanical-electric-data-thermal interfaces.The advantages of the sandwich assembly mode include flexible reconfiguration and efficient assembly.The prototype of the sandwich assembly mode is built for verifying the performance and the feasibility of the proposed mechanical-electric-data-thermal interfaces.Finally,an assembly case is accomplished to demonstrate the validity and advantages of the proposed“Tetris”microsatellite platform.展开更多
Probing the ideal limit of interfacial thermal conductance(ITC)in two-dimensional(2D)heterointerfaces is of paramount importance for assessing heat dissipation in 2D-based nanoelectronics.Using graphene/hexagonal boro...Probing the ideal limit of interfacial thermal conductance(ITC)in two-dimensional(2D)heterointerfaces is of paramount importance for assessing heat dissipation in 2D-based nanoelectronics.Using graphene/hexagonal boron nitride(Gr/h-BN),a structurally isomorphous heterostructure with minimal mass contrast,as a prototype,wedevelop an accurate yet highly efficient machine-learned potential(MLP)model,which drives nonequilibrium molecular dynamics(NEMD)simulations on a realistically large systemwith over 300,000 atoms,enabling us to report the ideal limit range of ITC for 2D heterostructures at room temperature.We further unveil an intriguing stackingsequence-dependent ITC hierarchy in the Gr/h-BN heterostructure,which can be connected to moirépatterns and is likely universal in van der Waals layered materials.The underlying atomic-level mechanisms can be succinctly summarized as energy-favorable stacking sequences facilitating outof-plane phonon energy transmission.This work demonstrates that MLP-driven MD simulations can serve as a new paradigm for probing and understanding thermal transport mechanisms in 2D heterostructures and other layered materials.展开更多
基金supported by the National Natural Science Foundation of China(6210333962073261)+1 种基金Shaanxi Natural Science Basic Research Program(2023-JC-YB-569)the Fundamental Research Funds for the Central Universities。
文摘In this paper,a flexible modular“Tetris”microsatellite platform is studied to implement the rapid integration and assembly of microsatellites.The proposed microsatellite platform is fulfilled based on a sandwich assembly mode which consists of the isomorphic module structure and the standard mechanical-electric-data-thermal interfaces.The advantages of the sandwich assembly mode include flexible reconfiguration and efficient assembly.The prototype of the sandwich assembly mode is built for verifying the performance and the feasibility of the proposed mechanical-electric-data-thermal interfaces.Finally,an assembly case is accomplished to demonstrate the validity and advantages of the proposed“Tetris”microsatellite platform.
基金support from the National Key R&D Program of China(Grant No.2022YFA1203100)the Research Grants Council of Hong Kong(Grant No.AoE/P-701/20)+3 种基金RGC GRF(No.14220022)T.L.sincerely thanks the Postgraduate Studentship from The Chinese University of Hong Kong.P.Y.is supported by the Israel Academy of Sciences and Humanities&the Council for Higher Education Excellence Fellowship Program for International Postdoctoral Researcherssupport from the National Natural Science Foundation of China(Nos.12472099 and 12102307)Z.Y.thanks the Stable Support Project of Shenzhen(No.20231122125728001).Some of the computations were conducted at the Supercomputing Center of Wuhan University.The authors also thank for the support of Open Source Supercomputing Center of S-A-I.
文摘Probing the ideal limit of interfacial thermal conductance(ITC)in two-dimensional(2D)heterointerfaces is of paramount importance for assessing heat dissipation in 2D-based nanoelectronics.Using graphene/hexagonal boron nitride(Gr/h-BN),a structurally isomorphous heterostructure with minimal mass contrast,as a prototype,wedevelop an accurate yet highly efficient machine-learned potential(MLP)model,which drives nonequilibrium molecular dynamics(NEMD)simulations on a realistically large systemwith over 300,000 atoms,enabling us to report the ideal limit range of ITC for 2D heterostructures at room temperature.We further unveil an intriguing stackingsequence-dependent ITC hierarchy in the Gr/h-BN heterostructure,which can be connected to moirépatterns and is likely universal in van der Waals layered materials.The underlying atomic-level mechanisms can be succinctly summarized as energy-favorable stacking sequences facilitating outof-plane phonon energy transmission.This work demonstrates that MLP-driven MD simulations can serve as a new paradigm for probing and understanding thermal transport mechanisms in 2D heterostructures and other layered materials.
