Fabrication of nanocomposite based on ZnO nanowire.
ZnO-NiO core-shell nanowires and Ni-ZnO nanoparticle-nanowire composites have been synthesized by atomic layer deposition (ALD) and H2 thermal reduction, respectively. Grown ZnO nanowires on Si substrates by vapor transport method were used as templates for the growth of NiO layers. In order to prevent interfacial interaction between deposited NiO and ZnO nanowires templates by the reaction at low temperature and to precisely control the thickness of NiO layer, ALD technique was suitably employed to form the ZnO-NiO core-shell nanowires. All surface area of ZnO nanowires was completely and uniformly covered by amorphous NiO layers at low temperature of 130 degrees C. The Ni-ZnO nanoparticle-nanowire composites were achieved by the thermal reduction of the ZnO-NiO core-shell nanowires at H2 atmosphere. The density of Ni nanoparticles on ZnO nanowires was roughly related to the pre-deposited NiO thickness and the inter-diffusion of Ni into the ZnO nanowire was not observed.
Lee
Sun Sook
SS
Device Materials Research Center, Advanced Materials Division, Korea Research Institute of Chemical Technology, Yuseong, PO. Box 107, Daejeon 305-600, Korea.
Kim
Hyun Jin
HJ
Chung
Taek-Mo
TM
Lee
Young Kuk
YK
Kim
Chang Gyoun
CG
An
Ki-Seok
KS