[Paper] Spontaneous Formation of Vertical Magnetic Metal Nanorod Arrays during Plasma Enhanced Atomic Layer Deposition




Spontaneous Formation of Vertical Magnetic Metal Nanorod Arrays during Plasma Enhanced Atomic Layer Deposition, Han-Bo-Ram Lee, Gil Ho Gu, J. Y. Son, C.G. Park, and Hyungjun Kim, Small, 2008


http://dx.doi.org/10.1002/smll.200801074


Abstract


A novel fabrication method of Co and Ni metal nanorods (NRs) without catalyst or template, based on the spontaneous formation of NRs during plasma-enhanced atomic layer deposition (PE-ALD) is developed. Pure Co and Ni NRs 9-10 nm in diameter are synthesized on SiO(2) and Si substrates by using metal-organic precursors and an NH(3) plasma mixed with a suitable amount of SiH(4) as a reactant. The lengths of the NRs are controlled on the nanometer scale by changing the number of PE-ALD growth cycles. Superconducting quantum interference device magnetometer measurements confirm the magnetic anisotropy of Co NRs caused by shape anisotropy.