【摘要】 采用热氧化线状Zn前驱体法,在压强为5 Pa,温度分别为400℃和600℃的条件下,制备了单晶ZnO纳米线和纳米杆.用SEM观察了样品的表面形貌,用XRD和HRTEM研究了样品的晶体结构和形态,分析表明细ZnO纳米线是通过"自催化液-固"过程沿着[21-1-0]方向生长,而ZnO纳米杆则依照气-固机制沿着[0001]方向生长.在室温下测量了514.5 nm激发下的拉曼光谱,结果表明由细ZnO纳米线和粗轴组成的样品拥有较多的氧空位,而在高温下氧化得到的ZnO纳米杆的结晶程度比较好,晶格结构更加完整.更多还原

【Abstract】 A newly developed route has been used to fabricate single-crystalline thin ZnO nanowires and ZnO nanorods by simple thermal oxidation of wirelike Zn precursors under 5 Pa at 400 ℃ or 600 ℃,respectively.Scanning electron microscope(SEM) and high resolution transmission electron microscopy(HRTEM) were employed to study the morphological characters and crystal structures of the samples.Analysis shows that the ZnO nanowires grow along the [21-1-0] direction via a "self-catalytic liquid solid" process,while the ZnO nanorods grow along the [0001] direction following a vapor solid mechanism.Raman spectra excited at 514.5 nm were measured at room temperature to investigate the structural information of the oxidized samples.The results show that there exist more oxygen vacancies in ZnO nanowires and thick trunks,while the ZnO nanorods oxidized at higher temperature crystal perfectly.更多还原