Growth of zinc hollow nanofibers and nanotubes by thermal evaporation-condensati

2020-02-14 22:48:11

furnace nm Deposition zinc Hollow

责任者: di Stasio, S. 单位: Ist. Motori, CNR, Napoli, Italy 来源出处: Chemical Physics Letters(Chem. Phys. Lett. (Netherlands)),2004/08/01,393(4-6):498-503 摘要: Highly crystalline zinc hollow nanofibers are synthesised via evaporation-condensation-deposition process. Zinc granules are thermally evaporated within a quartz reactor flowing nitrogen equipped with a furnace. Nucleation of zinc vapours is produced at the exit of the furnace by fast expansion and cooling through a nozzle in a flowing nitrogen atmosphere. Fibers with a diameter 40-120 nm, depending on the operating furnace temperature Tvap, and length several microns, are deposited as fluffy bundles on the walls of the expansion nozzle. They exhibit a hollow morphology, as revealed by TEM analysis. Some new structures, which we call nanoclubs, diameter 40-90 nm and typical length less than 300 nm, are also observed in correspondence of lower Tvap 关键词: chemical vapour deposition;condensation;nanostructured materials;nanotechnology;nanotubes;nucleation;transmission electron microscopy;vacuum deposition;zinc;crystalline zinc hollow nanofiber growth;nanotubes;thermal evaporation-condensation-deposition process;zinc granules;quartz reactor;nucleation;zinc vapours;flowing nitrogen atmosphere;operating furnace temperature;expansion nozzle;TEM analysis;nanoclubs;chemical vapour deposition;nanotechnology;40 to 120 nm;Zn