Huang Y H, Zhang Y, Liu L, Fan S S, Wei Y, He J
Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083, P R China.
J Nanosci Nanotechnol. 2006 Mar;6(3):787-90. doi: 10.1166/jnn.2006.086.
By simply controlling atmosphere, rods, tetraleg-rods, and arrays of ZnO nanostructures have been fabricated respectively through pure zinc powder evaporation without catalyst at temperature of 650 - 700 degrees C. Investigations through HRTEM and XRD showed that the growth of the synthesized ZnO nanostructures was controlled by vapor-solid mechanism. Field emission measurements revealed that all of the structures, owing to their very low turn-on voltage, sufficient emission current and proper linearity of 1/V - Ln(l/V2), are likely to be potential candidates as a field emitter. The results also indicated that field emission properties are relative to morphology and size of the tips of ZnO nanostructures, and the nanorods with sharp tips possess the first-class FE property.
通过简单地控制气氛，分别在650 - 700摄氏度的温度下，在无催化剂的情况下通过纯锌粉蒸发制备了棒状、四腿棒状和氧化锌纳米结构阵列。通过高分辨率透射电子显微镜（HRTEM）和X射线衍射（XRD）研究表明，合成的氧化锌纳米结构的生长受气固机制控制。场发射测量表明，所有这些结构由于其非常低的开启电压、足够的发射电流以及1/V - Ln(l/V2)的适当线性，都有可能成为场发射体的潜在候选材料。结果还表明，场发射性能与氧化锌纳米结构尖端的形态和尺寸有关，尖端尖锐的纳米棒具有一流的场发射性能。
