中文摘要：

通过分别生长核层与壳层制备出了ZnO/CuO核壳结构的纳米线。形貌和结构分析表明,ZnO核为单晶纳米线而CuO则以多晶形式覆盖在核层表面上。光致发光（PL）研究表明,ZnO纳米线PL强度随CuO壳层厚度的变化而变化。当壳层比较薄时ZnO的PL强度增大,这主要是由于CuO壳层对ZnO核层的修饰减少了表面态,而当壳层厚度增加到一定程度时,ZnO的PL强度不再变化,这主要是由于在核壳结构中形成了type-I型结构的原因。我们对这一现象做了详细的讨论。

英文摘要：

ZnO/CuO one-dimensional core/shell nanowires have been synthesized by sequential growth of core and shell,respectively.Phase and structural analyses reveal that the ZnO core has single crystalline phase whereas the CuO shell has polycrystalline phase covering on the surface of the core.The photoluminescence（PL） properties of ZnO nanowires change with the CuO shell thickness.The photoluminescence intensity increases when the shell is very thin,which is attributed to the surface modification by CuO shell.When the shell gets thicker,the intensity of the photoluminescence does not change any more because a type-I band alignment is formed between the core and shell.The experimental result is discussed.