Epitaxially Integrating Ferromagnetic Fe<sub>1.3</sub>Ge Nanowire Arrays on Few-Layer Graphene
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Abstract
We report vertical growth of ferromagnetic and metallic Fe<sub>1.3</sub>Ge nanowire (NW) arrays on few-layer graphene in a large area, induced by a relatively good epitaxial lattice match. Integrating well-aligned NW arrays onto graphene would offer a good opportunity to combine superb material properties of graphene with versatile properties of NWs into novel applications. Fe<sub>1.3</sub>Ge NWs are also synthesized on highly ordered pyrolytic graphite (HOPG). Fe<sub>1.3</sub>Ge NWs on graphene and HOPG show quite efficient field emission, which are ascribed to the well-interfaced vertical growth, a pointed tip, and high field-enhancement factor (β) of the NWs. The development of ferromagnetic metal NW−graphene hybrid structures would provide an important possibility to develop graphene-based spintronic, electronic, and optoelectronic devices
