CAJ | 학술논문

利用气相生长系统,通过调控实验参数,制备了多种形貌的ZnO准一维结构,如纳米条带、[011-0]和[21-1-0]取向的单侧生齿的梳状纳米条带、微米尺度的梳状结构,由多节状六角棱柱和八角棱柱组装成的微米条带等.通过X射线衍射、扫描电子显微镜及其所加载的能谱分析和背散射电子衍射仪、高分辨透射电子显微镜等分析技术, 对其中具有代表性的介观结构进行了系统的形貌分析和细致的结构解析.分析出基本的结构单元及其复合体, 揭示了显微尺度下ZnO晶体的外形多样性以及其形态演化中的关联和规律,即ZnO纳米条带、梳状结构和多节状微米条带具有晶体结构上的同一性.
이용기상생장계통,통과조공실험삼수,제비료다충형모적ZnO준일유결구,여납미조대、[011-0]화[21-1-0]취향적단측생치적소상납미조대、미미척도적소상결구,유다절상륙각릉주화팔각릉주조장성적미미조대등.통과X사선연사、소묘전자현미경급기소가재적능보분석화배산사전자연사의、고분변투사전자현미경등분석기술, 대기중구유대표성적개관결구진행료계통적형모분석화세치적결구해석.분석출기본적결구단원급기복합체, 게시료현미척도하ZnO정체적외형다양성이급기형태연화중적관련화규률,즉ZnO납미조대、소상결구화다절상미미조대구유정체결구상적동일성.
Controlled growth of ZnO quasi-one-dimensional nanostructures with different morphologies were accomplished by thermal oxidation of zinc vapor in a vapor deposition system. The products include uniform nanobelts with different growth directions, [011-0] and [21-1-0] orientated nanobelts with nano-teeth on one side, micro-scale comb-like nanobelts and faceted fibers with periodic junctions constructed by hexagonal prisms or octagonal prisms along [011-0] and [21-1-0] directions, and so on. The morphologies and the crystal structures were studied by X-ray diffraction (XRD), scanning electron microscope (SEM) equipped with electron backscatter diffraction (EBSD), high-resolution transmission electron microscope (HRTEM) in details. The basic configurations constructed the multiple ZnO nanostructures were discovered, the formation mechanism and the morphology multiformity of ZnO crystals were analyzed. The evolution processes of these quasi-one-dimensional configurations were discussed based on the crystal growth mechanisms. It is found that the ZnO fibers with periodic junctions and the comb-like nanobelts have an identity of crystal structure with the nanobelts.