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Total DOS curves for pristine SWCNT and (a) Pt-SWCNT, (b) Pd-SWCNT, (c) Ni-SWCNT, (d) Cu-SWCNT, (e) Rh-SWCNT, and (f) Ru-SWCNT systems. Projected density of states (PDOS) of the s and p orbitals of C atoms in SWCNT and s and d orbitals of metal atoms are also presented. The positive and negative values denote the spin-up and spin-down channels, respectively. The dashed lines indicate the Fermi level, which is set to zero.
