Controlled Growth and Field-Emission Properties of NbSe2 Micro/Nanostructured Films
Abstract:Single-crystalline NbSe2 nanobelt, nanorod (containing nanotube), and microplate films were grown on Nb substrates by a surface-assisted chemical-vapor-transport (CVT), respectively. The nanobelts have a rectangular section of 50×250 to 300×4500 nm2, and a length up to 330 m. The nanorods have a hexagonal section with a diameter of about 0.1–0.5 m, and a length up to 15 m. The nanotubes have rectangular, pentagonal or round sections with a diameter of about 0.4–0.5 m, a tube-wall thickness of about 45 nm, and a length up to several microns. The microplates have a hexagonal section with a diameter of about 0.05–10 m and a thickness of about 100 to 600 nm. Field-emission experiments using the films as cold electron cathodes showed that they had notable emission currents and low turn-on fields, suggesting their potential applications in field emission devices.
Document Type: Research Article
Publication date: October 1, 2010
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