Growth of AlQ_3 nanowires directly from amorphous thin film and nanoparticles

摘要

Amorphous AlQ_3 thin film and nanoparticles can directly grow into crystalline nanowires by a one-step heat treatment. With appropriate Ar pressure and heating time at 190 deg C, growth of alpha-phase nanowires from the film occurs. Similar growth from amorphous nanoparticles is also demonstrated by heat treatment at 150 deg C. The growth is dictated by the anisotropic crystallographic nature of alpha-AlQ_3. The growth mechanism can be illustrated in terms of nucleation and molecular migration within the film or nanoparticles. Complete structural transformation to nanowires leads to a spectral blue shift and an enhanced intensity of photoluminescence.