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低温液相法制备ZnO花-球微纳米结构

发表时间:2008-07-31  浏览量:1729  下载量:678
全部作者: 张强,刘长松,李涛,许桢
作者单位: 青岛理工大学机械工程学院
摘 要: 采用六水硝酸锌[Zn(NO3)2·6H2O]和六次甲基四胺(C6H12N4)作反应剂,基于氢氟酸(HF)的调控作用,利用低温液相技术制备了ZnO花-球微纳米结构。尽管反应溶液中有F-存在,但由于其浓度很低,所以X射线衍射(X-ray diffraction, XRD)分析表明产物确实为ZnO[而不是ZnF(OH)],其主衍射峰为(0002)。扫描电子显微镜(scanning electron microscope, SEM)观察表明,该ZnO微纳米结构具有三维的特征,由边缘厚度仅为数十纳米、宽度为数微米的薄片状纳米花瓣构成,这些纳米花瓣的表面即为(0002)面。ZnO在结晶生长过程中,(0002)晶面的生长可能受到反应溶液中某些物种严重的抑制作用,而{1010}晶面族的生长速度相对比较快,被压迫在一个由{0002}晶面包围的“狭小”区域中生长,因而产生了由纳米花瓣组成的微球三维结构。
关 键 词: 材料学;ZnO;三维微纳米结构;液相法;氧化物半导体;生长机制
Title: Low-temperature-solution prepared 3D ZnO flower-like sphere micronanostructures
Author: ZHANG Qiang, LIU Changsong, LI Tao, XU Zhen
Organization: Department of Mechanical Engineering, Qingdao Technological University
Abstract: In this paper, based on the tailoring and controlling of hydrofluoric acid, ZnO flower-like sphere micronanostructures were grown in an aqueous solution of zinc nitrate and hexamethylenetetramine. Although of the existence of F- in the reaction solution, the products were identified to ZnO [not ZnF(OH)] by X-ray diffraction (XRD) analysis because the concentration of F- was very low. The strongest peak was(0002). Scanning electron microscopy (SEM) observation showed that the ZnO micronanostructures were characterized by three-dimensional (3D) nanopetals with tens of nanometers in thickness and several micrometers in width. During the growth of ZnO crystals, the growth of (0002) planes were strongly prohibited by some species, while the {1010} planes grew quickly but were forced to grow within a narrow region surrounded by {0002} planes. This might be the main reason to form such ZnO special 3D micronanostructures.
Key words: materials science; ZnO; 3D micronanostructure; solution method; compound semiconductor; growth mechanism
发表期数: 2008年11月第14期
引用格式: 张强,刘长松,李涛,等. 低温液相法制备ZnO花-球微纳米结构[J]. 中国科技论文在线精品论文,2008,1(14):1580-1584.
 
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