在此，我们报告设计和制造具有两种不同边缘结构的雅努斯石墨烯纳米带（JGNRs）的方法。在Lieb定理和拓扑分类理论的指导下，我们在一个锯齿形边缘不对称地引入苯基序的拓扑缺陷阵列，同时另一条之字形边缘不变，设计出两种JGNRs。这打破了结构对称性，并在 ...

Friday's launch by a Long March-2D carrier rocket, the 556th flight mission involving the Long March carrier rocket series, ...

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...