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A novel method to synthesize cobalt oxide (Co 3 O 4 ) nanowires from cobalt (Co) nanobowls
Author(s) -
Srivastava A. K.,
Madhavi S.,
Ramanujan R. V.
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925503
Subject(s) - cobalt , coercivity , nanowire , materials science , microstructure , ferromagnetism , cobalt oxide , oxide , chemical engineering , phase (matter) , ferromagnetic material properties , nanotechnology , crystallography , magnetization , metallurgy , chemistry , condensed matter physics , organic chemistry , magnetic field , physics , quantum mechanics , engineering
A novel method suitable for the synthesis of the cobalt oxide (Co 3 O 4 ) nanowires at targeted regions is presented in this report. Cobalt (Co) nanobowls synthesized by colloidal crystal directed assembly were transformed into Co 3 O 4 nanowires by a simple heat treatment process. Co nanobowls exhibited a two phase (h.c.p. + f.c.c.) microstructure while single phase microstructure was observed for Co 3 O 4 nanowires. Ferromagnetic Co nanobowls showed a dependence of coercivity on bowl size while Co 3 O 4 exhibited weak ferromagnetic behavior.