摘要
Ultralong ZnO nanocombs have been synthesized on silicon substrates with a high growth rate of~7μm/s using a simple“thermal evaporation and condensation”method promoted by Cu catalysts.The lengths of the ZnO nanocombs range from several millimeters to more than one centimeter and the diameters of the branches are about 300 nm.The growth mechanism of the ultralong nanocombs and the catalytic behavior of the copper are discussed.The nanocombs were readily separated and their applications as optical polarizer and grating were investigated.The results show that the ultralong ZnO nanocombs can act as effective optical components in miniaturized integrated optics systems.
基金
from the Chinese National Key Basic Research Special Fund(Grant Nos.2006CB921704 and 2007CB924902)
the Specialized Research Fund for the Doctoral Program of Higher Education(Grant No.20070269016)
Chenguang Project of Shanghai Education Development Foundation(Grant No.2008CGB23)
the Excellent Young Teachers Program of Shanghai Higher Learning Institutions(Grant No.AAYQ0723).
