采用水热法在石英衬底上以Zn(CH3COO)2·2H2O和Co(NO3)2·6H2O水溶液为源溶液，以C6H12N4(HMT)溶液作为催化剂，在较低温度下制备了Co掺杂的ZnO纳米棒。采用 X射线衍射(XRD)和扫描电子显微镜(SEM)对所生长ZnO纳米棒的晶体结构和表面形貌进行了表征，考察了Co掺杂对ZnO纳米棒微观结构和对发光性能影响的机制。结果表明：Co掺杂的ZnO纳米棒呈六方纤锌矿结构，具有沿(002)面择优生长特性，Co掺杂使ZnO纳米棒的直径变细；同时室温光致发光(PL)谱检测显示Co掺杂ZnO纳米棒具有很强的近带边紫外发光峰，而与深能级相关的缺陷发光峰则很弱。本研究采用水热法在石英衬底上于较低温度下生长出了具有较高光学质量的Co掺杂ZnO纳米棒。

One-dimensional (1D) nanostructure materials have been extensively studied because of their potential applications in nanoelectronic devices, such as field-effect transistors, single-electron transistors, photodiodes, and chemical sensors. Among these 1D semiconducting nanomaterials, there has been considerable attention focused on low-dimensional ZnO nanostructures on account of its many interesting properties, such as a wide band gap (3.37 eV), a large exciton binding energy (60 meV), excellent chemical and thermal stability, transparency, biocompatibility, and wide electrical conductivity range. ZnO has probably the richest family of nanostructures among all materials, which exhibits the most splendid and abundant configurations of nanostructures. Single crystal ZnO nanorod is of particular interest due to its potential applications in an emerging area of nanotechnology. Up to now, numerous experimental attempts have been reported to fabricate ZnO nanorod materials, such as molecular beam epitaxy (MBE), pulsed laser deposition (PLD), sputtering, electrochemical deposition, vapor phase transport (VPT), chemical vapor deposition (CVD), thermal evaporation and so on. However, these methods usually require expensive equipment and high operation temperature, which are not compatible with organic substrates for applications in flexible and wearable electronics. Compared with the methods mentioned above, the hydrothermal method as a high performance growth technique for ZnO nanorod/nanowire is especially attractive due to its obvious advantages of low-cost, low temperature operation and environmental friendliness. Moreover, this technique can be carried out at low temperatures and large scale on all kinds of substrates, regardless of whether it is crystalline or amorphous. The synthesis and properties of Co-doped ZnO nanomaterials have been reported, most attention was paid to their its magnetic properties, but little report is focused on the optical properties of the nanomaterials.In this paper, Co-doped ZnO nanorod arrays were successfully prepared on quartz substrate by hydrothermal method at temperature of 95 ℃. The crystal structure, morphology, and optical properties were characte-rized with X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) and reflectance analytic approaches, respectively. XRD results illustrated that Co-doped ZnO nanorod arrays with wurtzite structure are grown densely and vertically on the substrates. SEM images showed that the Co-doped ZnO nanorod arrays have smaller diameter than pure ZnO nanorod arrays. The high-intensity near-band edge ultraviolet (UV) emission peak was observed in room temperature photoluminescence (PL) spectra for the ZnO nanorod arrays on all samples, yet the usually observed defect related to deep level emission is very weak, indicating high optical quality ZnO nanorod arrays can be achieved via this low-temperature easy-process chemical approach. Moreover, the small shift in the UV emission indicated that Co2+ ions are substituted for Zn2+ in ZnO nanorods.