CdO是窄禁带的氧化物半导体，在太阳能电池、液晶显示器、可充电电池、气体传感器等领域具有广泛的应用背景。ZnO是宽禁带的半导体，在紫外激光器、短波长光电器件、气体传感器、催化剂等领域具有广泛的应用前景。核壳(Core-Shell)结构由于可以在核上包裹上合适的壳层，从而达到对核的保护、修饰作用，还可以产生特定的物理、化学特性，近年来受人们的广泛关注。本论文用Cd金属有机单分子源为前驱体，利用单分子源在有机溶剂中的热分解方法生长了CdO纳米晶体。在优化生长条件的基础上，以CdO纳米晶体为核，成功生长了CdO/ZnO的核/壳纳米结构。用XRD、HRTEM和吸收光谱对CdO纳米晶体及CdO/ZnO核/壳纳米结构进行了表征,研究了CdO纳米晶体的生长机理和CdO/ZnO核/壳纳米结构的生长条件。研究的主要结论如下：1． CdO纳米颗粒的尺寸依赖于生长温度与单分子源的浓度。单分子源的浓度保持在0.02 M时，生长温度由160℃升高到250℃，纳米颗粒的尺寸从29nm增大到56nm，相应纳米颗粒的直接禁带宽度由2.8eV红移到 2.6eV，纳米颗粒表现出明显的量子尺寸效应；但是160℃下生长的CdO包含中间产物。2． 在250℃下，前驱体的浓度从0.02 M增大到0.04M，纳米颗粒尺寸的平均尺寸由56nm增大到60nm，其禁带带隙从2.6eV降低到 2.49eV。3． 以前面生长的CdO纳米晶体为核，在不同温度下加入ZnO单分子源前驱体，成功生长出了CdO/ZnO核壳结构。核壳结构对核的光吸收有一定的影响，其吸收光谱相对单核的吸收光谱有红移。壳层注入速率越慢，核壳之间的结合越稳定。

CdO is a narrow indirect band gap semiconductor with applications in solar battery, LCD, chargeable battery, gas sensors and so on. ZnO is a direct wide band gap semiconductor with a range of applications including ultra-violet laser, short wave optoelectric devices, gas sensors, activators. Core-shell structures have attracted more attention because the core can display special physical and chemical properties by capped with proper shell. CdO nanocrystals were obtained by decomposing the metal-organic single molecular precursor of cadmium in organic solvent. CdO/ZnO Core-Shell structures were also grown using CdO as the core. The CdO nanocrystals and the core-shell structure were characterized by XRD, HRTEM, absorption spectroscopy. We investigated the growth mechanism of CdO nanoparticles and growth conditions of CdO/ZnO Core-Shell structures and conclusions were drawn as follows:1. The sizes of CdO nanocrystals dependened on the growth temperature and the concentration of precursor. While the concentration of precursor was kept at 0.02 M and the growth temperature was changed from 160℃ to 250℃, the sizes of nanoparticles increased from 29nm to 56nm. The corresponding band gap of CdO nanoparticles shifted from 2.8eV to 2.6eV. Obvious quantum confinement effects were observed. Other phase except CdO was observed in sample grown at 160℃.2. The size of CdO nanocrystal increased from 56nm to 60nm with an increase in concentration of precursor from 0.02M to 0.04M at 250℃ and the correspongding bandgap shifted from 2.6 eV tom 2.49 eV.3. Using the CdO nanocrystal as the core, we obtained the CdO/ZnO core-shell structure by injecting the ZnO precursor at different temperature. Core-shell structure’s absorption spectrum has a red shift compared with that of the pure core. The combination between core and shell will be more stable if the injection speed of shell precursor is slower.