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A snapshot of a 3-Y-junction (3Y-SWNT) simulated system in a side-on orientation (xz plane). Colors match those in Fig. 1. The angle between any 2 neighboring tubes at each Y-junction is 120°. The lengths of the main tube (MT), the 2 middle tubes denoted MT1 and MT2, and the 4 branch tubes denoted BT1, BT2, BT3, and BT4 are 1.44 nm, 1.44 nm, and 1.21 nm, respectively.
