Self filling of Ni nanoparticles in amorphous AlN nanotubes and its field emission property

摘要

Unique aluminum nitride amorphous nanotubes filled with Ni nanoparticles have been successfully synthesized through the reaction of NH_3 over Ni-Al thin film at 1000℃, which is similar to the extended vapor-liquid-solid technique. The X-ray diffraction and high-resolution transmission electron microscopic results are in good agreement with the amorphous nature of A1N nanotubes and crystallinity of Ni nanoparticles. The A1N nanotubes were having average diameter 35 nm and length ～4 μm, whereas the Ni nanoparticles were having 5 nm in diameter. The unique structure showed excellent field emission property and high electrical conductivity ～0.43 kmho/m at room temperature. The mechanism of good field emission property has been explained in detail.