首先通过溶胶-凝胶法在 Si 片基底上制备1层ZnO 纳米薄膜,作为纳米棒的晶种层,然后利用金属浴沉积法在 ZnO 纳米薄膜基础上制备择优取向的ZnO 纳米棒阵列,最后通过水热法二次成核结晶形成纳米片.研究证明,ZnO 纳米棒阵列和纳米片均沿着c 轴取向.在 Cu2＋抑制极性面生长的作用下,形成的ZnO 纳米片结构均匀,分布面积广,单片 ZnO 纳米片的厚度约为8 nm,面积呈平方微米级,较大的有40μm2左右.ZnO 纳米结构的生长取向对其物理化学性能具有重要影响.高度沿c 轴取向的 ZnO 纳米棒有利于紫外光发射和激光器的发展,但极性面的缩小不利于光催化反应.
This paper prepared large scale ZnO nano-rod arrays and nano-sheets via sol-gel methods on Si sub-strates.We showed that the synthesized nano-arrays and nano-sheets grew along the (001)direction.With the Cu2+ blocking the growth of the polar surfaces,the nano-sheets looked structural homogenous and sized 8 nm in thickness and 40μm in area.The orientation of the nanostructures had significant influence on their physical-chemical performance.Strong orientation along the c-axis of nano-structured ZnO may be favorable for ultravio-let lasing,but may be disadvantageous to photo-catalytic reaction.
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