Varanasi C V, Leedy K D, Tomich D H, Subramanyam G, Look D C
University of Dayton Research Institute, Dayton, OH 45469, USA.
Nanotechnology. 2009 Sep 23;20(38):385706. doi: 10.1088/0957-4484/20/38/385706. Epub 2009 Aug 28.
ZnO nanorods were grown on a variety of substrates such as Si, SiO(2)/Si and sapphire in a large-area pulsed laser deposition chamber designed for sensor device fabrication. Processing conditions were optimized to grow ZnO nanorods with or without seed layers. Au, Cr and BaSrTiO(3) (BST) seed layers were investigated to compare their effects on the diameter and orientation of ZnO nanorods. ZnO nanorods were observed to align better when grown on sapphire, Cr or BST seed layers as compared to Au or Si layers. The highest quality nanorods were those grown on BST seed layers, as shown by 4 K photoluminescence donor-bound-exciton linewidths of only 0.5 meV.
在一个为传感器设备制造设计的大面积脉冲激光沉积腔中，在诸如硅、二氧化硅/硅和蓝宝石等各种衬底上生长了氧化锌纳米棒。优化了工艺条件以生长有或没有种子层的氧化锌纳米棒。研究了金、铬和钛酸锶钡（BST）种子层，以比较它们对氧化锌纳米棒直径和取向的影响。与金或硅层相比，当在蓝宝石、铬或BST种子层上生长时，观察到氧化锌纳米棒排列得更好。质量最高的纳米棒是在BST种子层上生长的那些，4K光致发光施主束缚激子线宽仅为0.5毫电子伏特就证明了这一点。
