Fabrication, magnetic anisotropy and tunable fluorescence of amorphous La x Cu y O z nanowire arrays

The amorphous La x Cu y O z nanowire arrays (NWAs) with average diameter 90nm and lengths 5 mu m have been prepared by chemical co-precipitation assisted by subatmospheric pressure suction filtration (SPSF) in porous anodic aluminum oxide (AAO) template. There is obvious magnetic anisotropy in La x Cu y O z NWAs, and unusual easily magnetized direction is perpendicular to the axis of nanowire. The tunable fluorescence of rare earth (Re=Tb, Eu, Sm) doped La x Cu y O z NWAs and the respective contribution of La and Cu to the fluorescence of NWAs were investigated, the results show that the fluorescent intensity of Eu, Tb, Sm-doped La x Cu y O z NWAs increased with accession of dopant contain different mole percents. The intensity of emission peaks gradually increased with Eu from 2 to 50mol% at 591nm, Sm from 2 to 50mol% at 610nm or achieved to maximum at 542nm when doping content of Tb is 5mol%. Furthermore, La exhibit facilitation or Cu present inhibition to fluorescent intensity of NWAs.