Synthesis And Application In Nanogenerators Of One-dimensional Well-aligned ZnO Nanoarrays

One-dimensional well-aligned ZnO nanoarrays have superior semiconductor and piezoelectric properties, the synthesis methods of which are simple and diverse. Currently it has attracted great attention due to its potential in nanosystems as a nanogenerator. Then for the research it is fundamental to prepare large-area one-dimensional well-aligned ZnO nanoarrays and it is the key to improve output efficiency of nanogenerators. In this paper, sythesis and application in nanogenerators of one-dimensional well-aligned ZnO nanoarrays have been researched. Main content and innovation are as follows:1. Hydrothermal methods and chemical vapor deposition methods are attempted to synthesis one-dimensional well-aligned ZnO nanoarrays. The final choice is Zn-NH3 ? H2O hydrothermal growth. By adjusting experimental parameters i.e. solution concentration and reaction time, different length and surface to volum ratio of the samples are controlled. Qualities and topography of these samples are investigated by X-ray diffraction, scanning electron microscopy and transmission electron microscopy analysis. Two-step growth mechanism is put forward. This growth method for one-dimensional well-aligned ZnO nanoarrays is reproducible and can be widely used to prepare large-area ZnO nanoarrays.2. Nanogenerator models with different length and surface to volume ratio samples are assembled respectively. Output current of these models are tested. The results show that the increased length and enhanced surface to volume ratio will help to improve the output efficiency of nanogenerator models. This study method provides a virtual method to control and increase output efficiency of ZnO nanogenerators.3. Creative improvement is made to the original nanogenerator model. Based on this improved model a new-style ZnO nanogenerator is proposed for the first time, which is driven by high frequency electromagnetic radiation signal i.e. alternative electromagnetic field. A preliminary analysis of its generating mechanism is discussed. The effects of angle and distance between the signal source and the model to the output current of the new model are studied. This model has successfully created electromagnetic energy into electrical energy, expanded the scope of application of ZnO nanogenerators, and greatly increased operating life and output efficiency of ZnO nanogenerators.