Synthesis and properties of germanium nanowires
نویسنده
چکیده
As a promising electronic material, Ge nanowire (GeNW) has attracted much attention for its low band gaps, high mobilities, and unprecedented dimensions. This article reviews recent research and advancement on this topic and summarizes many aspects of GeNWs, including preparation, surface chemistry, physical properties, functional devices, and controlled assembly. It is shown that GeNWs can be readily synthesized by chemical methods and their electronic properties are comparable or superior to that of the bulk counterparts. Studies of surface chemistry have revealed dominant roles of surfaces on nanowires, and this result led to successful passivations toward air-stable, high-performance functional devices. Finally, controlled assembly to organize chemically synthesized nanowires into functional structures is discussed. Doors are opened up to widely utilize this novel material as excellent electronic building blocks.
منابع مشابه
Gold catalytic Growth of Germanium Nanowires by chemical vapour deposition method
Germanium nanowires (GeNWs) were synthesized using chemical vapor deposition (CVD) based on vapor–liquid–solid (VLS) mechanism with Au nanoparticles as catalyst and germanium tetrachloride (GeCl4) as a precursor of germanium. Au catalysts were deposited on silicon wafer as a thin film, firstly by sputtering technique and secondly by submerging the silicon substrates in Au colloidal s...
متن کاملVariation of the Electronic Functionality of Self-Seeded Germanium Nanowires through Synthesis Determined Core-Shell Interface States
Bottom up grown germanium nanowires may have an important role to play in future electronic devices. While the electrical properties of nanowires grown using a metallic seed as a catalyst have been extensively reported we study self-seeded nanowires in this thesis. Such wires are core-shell in nature and are grown without any intentional doping. Self-seeded nanowires have been previously propos...
متن کاملLow-temperature synthesis of single-crystal germanium nanowires by chemical vapor deposition.
Chemically derived nanowire materials have attracted much attention because of their interesting geometries, properties, and potential applications.[1±3] Various methods have been developed for synthesizing semiconducting nanowires including laser ablation,[2,3] physical vapor deposition under high temperatures,[3±7] and solvothermal growth under high pressures and moderate temperatures.[3,8±10...
متن کاملA Simple and High Yield Solvothermal Synthesis of Uniform Silver Nanowires with Controllable Diameters
Silver nanowires were synthesized by solvothermal method through reducing silver nitrate (AgNO3) with ethylene glycol (EG) in the presence of polyvinylpyrrolidone (PVP). In order to prevent the agglomeration of Ag+ in the initial Ag seeds formation, sodium chloride (NaCl) was added into the solution to form AgCl colloids. By dissolving AgCl in the late stages, Ag+ ions were released into the so...
متن کاملMetal-seeded growth of III-V semiconductor nanowires: towards gold-free synthesis.
Semiconductor nanowires composed of III-V materials have enormous potential to add new functionality to electronics and optical applications. However, integration of these promising structures into applications is severely limited by the current near-universal reliance on gold nanoparticles as seeds for nanowire fabrication. Although highly controlled fabrication is achieved, this metal is enti...
متن کامل