Abstract
In this work, CdS nanowires (NWs) were prepared by the catalytic method using Au nanoparticles onto GaAs and CdS substrates. Scanning and transmission electron microscopy techniques (SEM, TEM) allowed observing different morphologies in the obtained products: variable diameter, pointed and ultra-long several microns length NWs. Also, a nanotube like hollow structure was identified when CdS/ITO/glass substrates were used, and its possible mechanism of formation is presented. The origins of the obtained morphologies was explained as depending on the type of vapor specie, the growth temperature and the used substrate. The photoluminescence (PL) of the NWs can be observed with the naked eye even at RT. PL spectra as a function of temperature were analysed and related with the morphology features.
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