Organometallic precursors as catalyst to grow three dimensional micro/nano structures: spheres, clusters and wires
Résumé
This paper presents the growth and characterization of three-dimensional structures using metal-organic (or organometallic) chemical precursors like M(CH3)3, where M is a metal. Their morphology depends principally on growth temperature and conditions at the surface of the substrate. These 3D structures can be separated into two classes: i) one with (Ga, Al, In) metallic alloys shaped as sphere, sceptre or cylinder and a carbon membrane covering the alloy; ii) other with semiconductor or oxide nanowires capped by a metallic sphere. The metal-organic precursors can be seen as catalysts molecules that grow semiconductors with micro and nano-structures similar to the role of gold particles used to grow nanowires in the VLS mechanism. We present the MOCVD growth of Ga2O3, CuGaxOyand (Ga,In)P nanowires using the metal-organic precursors on metallic or metal containing substrates.
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