Figure 2
From: Effective mechanical properties of multilayer nano-heterostructures

(a,b) Top view and side view of a generalized form of multiplanar hexagonal nano-structure. (The in-plane angles θ and ψ are indicated in Fig. 2(a), wherein it is evident that \(\psi ={90}^{\circ }-\frac{\theta }{2}\). The out-of-plane angle α is indicated in Fig. 2(b)). (c) Energy components associated with the in-plane (1–2 plane) and out-of-plane (1–3 plane) deformation mechanisms (Direction 1 and 2 are indicated in the figure. Direction 3 is perpendicular to the 1–2 plane. Here A and B indicate two different atoms).