Double cube model

Figure 3.6. Schematic of the cube model for energy transfer ( ) of an atom/molecule of mass m incident with energy Et to the lattice represented by a cube of mass Ms. The atom/molecule adsorption well depth is W. The double arrow labeled Ts emphasizes that the cube also has initial thermal motion in the scattering.

The fourth is a cube synthesized by Chen and Seeman, the components of which are based upon DNA (Fig. 9.12c). [35] The directionality and ability of the double helix to form branched junctions are exploited for the edges and vertices, respectively. Interestingly, each face of this molecule forms a cyclic strand which is catenated with strands of adjacent faces. Molecular modeling experiments indicate the length of each edge to be approximately 6.8 nm. 

Fig. 1 Lewis cubical atom model of a double bond (left) and placement of the electron pairs on edges of the cube to account for the tetrahedral arrangement of the four bonds of an atom (right)...

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