Cubic-to-Tetragonal Phase Transitions in Ag–Cu Nanorods

Table 1

The side length 𝑠, the cross-sectional area 𝐴_𝑁𝑅, the total number 𝑁 of atoms and the total number 𝑁_{𝑝𝑙𝑎𝑛𝑒} of atoms in individual atomic planes. 𝐴_𝑁𝑅 values refer to the initial configuration of the different composite Ag–Cu–Ag NRs investigated with fcc crystallographic structure. The NRs are about 15 nm long, that is, include 72 atomic planes perpendicular to the NR main axis. For each given NR, the number 𝑘 of Cu atomic planes was varied of two units in the range between 2 and 24. The number 𝑁_𝐶𝑢 of Cu atoms in composite Ag–Cu–Ag NRs can be evaluated by the product of the number 𝑘 of Cu atomic planes in the NR with the number 𝑁_{𝑝𝑙𝑎𝑛𝑒} of atoms in individual atomic planes. The number 𝑁_𝐴𝑔 of Ag atoms can be evaluated as the difference between the total number 𝑁 of atoms in the NR and 𝑁_𝐶𝑢.

𝑠 (nm)	𝐴NR (nm^2)	𝑁	𝑁plane
1.2	1.44	1800	25
1.6	2.56	2952	41
2.0	4.00	4392	61
2.4	5.76	6120	85
2.8	7.84	8136	113