High-density (∼ 80/um2) vertical InAs nanowires (NWs) with small diameters (∼ 28 nm) were grown on bare Si (111) substrates by means of two-step metal organic chemical vapor deposition. There are two critical factors in the growth process: (1) a critical nucleation temperature for a specific In molar fraction (approximately 1.69 × 10−5 atm) is the key factor to reduce the size of the nuclei and hence...
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