On the existence and stability of double-walled armchair silicon carbide nanotubes

Chemistry of one dimensional silicon carbide materials: Principle, production, application and future prospects

“…Classical MD simulations [98] show that SWSiCNTs are more stable than nanowires below a critical diameter of about 1.6 nm, while SiCNW are more stable than nanotubes beyond that. Recently Adhikari et al [99] have studied the existence and stability of double-walled armchair silicon carbide nanotubes using the finite cluster approximation. The study indicates that the stabilities of the double-walled SiC nanotubes are of the same order as those of single-walled SiC nanotubes suggesting the possibilities of experimental synthesis of both single-walled and double-walled SiC nanotubes.…”

Electronic structures and stability of double-walled armchair (n,n)@(m,m) SiC nanotubes

“…To consider the interaction energy among the outer and inner tubes the formation energies of the (n, n)@(m, m) DWSiCNTs (with n = 4 and 5 and m = 7 to 15) are calculated from their total energies relative to the corresponding isolated single-walled SiC nanotubes using the following equation [22][23][24]:…”

An Ab initio Study on the Convergence of Electronic Properties of SiC Nanotubes

“…These studies claim that the nanotubes with other ratios will eventually collapse the tube into nanowires or clusters with solid interiors. Some other theoretical studies [38][39][40][41] have suggested that the stable silicon carbide nanotubes are of three types-types 1, 2 and 3, depending upon the atomic arrangement in the nanotube. Type 1 consists of alternating Si and C atoms with each Si atoms having three C neighbors and vice versa.…”