利用滚压振动磨在干法室温条件下将金属锌制备成尺度约为3～5nm的锌量子点,并使产物与水蒸气在250C进行化学反应,得到纳米氧化锌或纳米氧化锌与锌的混合物.分别利用能量发射谱仪(EDS)、透射电镜(TEM)对样品成分和形貌进行了表征.结果表明,250℃反应温度下得到的产物具有良好的分散性,其特征是棒状和片状结构共存,而且纳米棒具有显著的沿[o11 1]晶向生长的趋势.室温下光致发光(PL)谱显示,在360nm和388nm处有双紫外发射峰,属于激子态发光,双紫外发射峰可能与掺杂能级有关;同时,在496nm处有蓝光发射峰,在515nm处有绿光发射峰,这两种发射属于表面缺陷态发光.对各种发光峰的发光机制进行了讨论.UV-Vis吸收光谱表明,产物在紫外区有很强的紫外吸收,吸收峰出现了蓝移现象,验证了Zn纳米量子点的掺杂形成掺杂能级,也与测得的可见光发射一致.
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