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The growth mechanism and cathodoluminescence of dual phase ZnS tetrapod tree-like heterostructures with the zinc blende structured trunks and the hexagonal wurtzite structured branches were prepared and characterised. The polarity induced growth of tetrapod ZnS trees was confirmed by advanced electron microscopy. Two strong UV emissions (centred at 3.68 and 3.83 eV) have been observed at room temperature,...
The behavior of transition metals in ZnO has become an important topic for spintronics. As the fundamental property, the nano-structural characteristics of the transition metal implanted ZnO have been studied. It is clearly observed that in ZnO the Mn+ implantation and post-annealing result in (1) the formation of crystallographically orientated Zn nanocrystals within the ZnO matrix and (2) Mn atoms...
In this paper, we demonstrate the key issues of axial nanowire heterostructures, such as, the fundamental criteria for formation and failure of axial nanowire heterostructures via vapor-liquid-solid mechanism and lateral misfit strain relaxation in these structures. We show the failure of axial nanowire heterostructures by growing InAs axially on GaAs nanowires, and the lateral misfit strain relaxation...
Summary form only given. In the last few years, semiconductor nanowires (NWs) have attracted intensive attention due to both the intriguing fundamental properties and their potential applications in optoelectronic devices. GaAs NWs grown by metalorganic chemical vapor deposition (MOCVD) often exhibit tapered and kinked morphologies, depending on growth temperature. However, straight NWs of uniform...
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