作　　者： ; ; ; ; ;

机构地区： 北京大学化学与分子工程学院

出　　处： 《物理化学学报》 2003年第5期478-480,共3页

摘　　要： 通过低温压热的方法,在经过预先处理长满晶核的SnO2导电玻璃基底上制备出具有高度取向的ZnO亚微米棒阵列.用扫描电子显微镜(SEM)、选区电子衍射(SAED)及X射线粉末衍射(XRD),对制备出的ZnO亚微米棒的结构和形貌进行了表征.SEM测试结果表明,ZnO亚微米棒是六方型的,近乎垂直地长在基底上,棒的直径为400～500nm,长度约为2μm.SAED和XRD结果表明,ZnO亚微米棒为单晶,属于六方晶系,并且沿犤001犦方向择优取向生长. Highly oriented ZnO submicrorod arrays have been prepared on SnO2 conducting glass substrates which were modified with densely packed ZnO crystal nucleus. The growth procedure of ZnO submicrorod arrays consists of two steps: (1) modification of SnO2 conducting glass substrates with dispersed ZnO crystal nucleus by immersing the substrates into concentrated solution, and (2) hydrothermal growth of ZnO submicrorods in aqueous solution. Scanning electron microscope (SEM), selected area electron diffraction (SAED) and X-ray diffraction (XRD) have been employed to investigate the ZnO submicrorod arrays. SEM images indicate that ZnO hexagonal submicrorod arrays grow nearly perpendicularly to the substrates. The diameter and the length of ZnO submicrorod are about 400 similar to 500 nm and 2 mum for 2 h growth time,respectively. Result of SAED reveals that the ZnO submicrorod arrays are single-crystalline hexagonal rods. XRD shows that the ZnO submicrorods are wurtzite. The significantly higher intensity obtained from the (002) diffraction peak indicates that the submicrorods are preferentially oriented in the c-axis direction (grown along the [001] crystallographic face direction).

关 键 词： 单晶 亚微米棒阵列 制备 表征 定向生长 氧化锌 水热法 半导体材料

领　　域： [电子电信]