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利用简单的碳热蒸发法在Si(100)衬底上成功制备了天线状的氧化锌纳米材料,并利用X光衍射、扫描电子显微镜、透射电子显微镜和光致发光谱对样品进行了结构表征和光致发光特性研究。实验结果表明:制备的单晶氧化锌材料具有纤锌矿结构,并且沿着[0001]方向择优生长;每个纳米结构有4个针足,每个针足的顶部直径约为5-50nm;室温光致发光谱中包含1个386nm附近的较强的近紫外发光峰和1个523nm附近的较弱的绿色发光峰,分别由自由激子复合和深能级发射引起。同时讨论了天线状的氧化锌纳米材料在高温低氧条件下的生长机理。
Antenna-like zinc oxide nanomaterials were successfully prepared on Si (100) substrates by simple carbothermal evaporation method. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and photoluminescence spectroscopy. Study on Luminescence Properties. The experimental results show that the prepared single crystal zinc oxide material has a wurtzite structure and preferentially grows along the [0001] direction; each nanostructure has 4 needles each having a top diameter of about 5 to 50 nm; The room temperature photoluminescence spectrum contains a strong near-UV peak around 386 nm and a weaker green emission peak near 523 nm, which are caused by free exciton recombination and deep level emission, respectively. The growth mechanism of antenna-like zinc oxide nanomaterials under high temperature and low oxygen conditions was also discussed.