ABSTRACTIn this paper, we present our recent studies on the synthesis and magnetoresistance of single crystalline Fe3O4 core-shell nanowires and nanotubes. Homogeneous Fe3O4 nanowires/tubes with controllable length, diameter and wall thickness were synthesized. The as-prepared material composition and stoichoimetry have been carefully examined and confirmed with a variety of characterization techniques including XRD, EDS, XPS, and TEM. Magnetoresistance under different temperatures was systemically studied. Up to 1.2% room temperature magnetoresistance was observed in the as synthesized nanowires/tubes under a magnetic field of B = 1.8 T.
The growth, crystal structure, strain relaxation and room temperature transport characteristics of GaAs/InSb core–shell nanowires grown using molecular beam epitaxy are investigated.
Lasing from individual GaAs-AlGaAs core-shell nanowires up to room temperature