【摘要】 将锌粉和石墨粉以一定比例混合放入家用微波炉中,在微波辐照下燃烧生成了白色松软的ZnO膜,将此薄膜用扫描电子显微镜(SEM)、能量损失谱(EDS)、透射电子显微镜(TEM)和X射线衍射光谱(XRD)分析其成分和形貌。结果显示,该ZnO为单晶四针状晶须,晶须直径为20~50nm,分析了它的生长机理并测试其场发射特性,得到该ZnO的开启场强较低为3.88V/μm,相应的电流密度为10μA/cm2,在场强为5.7V/μm时达到最大发射电流密度为0.39mA/cm2。更多还原

【Abstract】 The zinc(Zn)and graphite powders were mixed together with an appropriate proportion,then were put into the household microwave oven,and burned to synthesize a soft white zinc oxide(ZnO)film.The composition and morphology of the film were analyzed by scanning electron microscope(SEM),energy dispersive spectrometer(EDS),transmission electron microscopy(TEM)and X-ray diffraction(XRD).The result shows that the ZnO has a single crystalline structure and is a tetrapod-like ZnO with the diameters of 20-50 nm.The growth mechanism was analyzed and its field-emission characteristic was tested.The result shows that the ZnO film has a low turn-on field intensity of 3.88 V/μm at the current density of 10 μA/cm2,and the max current density is 0.39 mA/cm2 at the field intensity of 5.7 V/μm.更多还原