Controlled-synthesis of ZnO nanorings

• 来源期刊: 中国高等学校学术文摘·化学
• 关键词: zinc oxide controlled-synthesis nanoring
• 年，卷（期）: 2008,（4）
• 页码范围: 458-463
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11458-008-0081-5

摘要

ZnO nanorings were synthesized on a large scale by an easy solution-based method at 70℃ for 5 h using hexamethylenetramine (C6H12N4, HMT) and Zn ant poly(acrylamide-co-diallyldimethylammonium chlor-ide) (PAM-CTAC). The structure and morphology of the products were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The influence of experimental conditions such as concentra-tion of surfactant and reactants, reaction temperature on the structure and morphology of the products were inves-tigated. A probable formation mechanism of ZnO nanor-ings in the presence of surfactant PAM-CTAC was discussed. The results show that the products are wurtzite hexagonal ZnO nanorings with an inner diameter of 220 nm and a wall thickness of 70 nm. Reaction temper-ature and concentration of reactants influence the shape and size ofZnO nanorings but PAM-CTAC plays the key role in the formation of ZnO nanorings. Through adjust-ing the concentration of PAM-CTAC, controlled-syn-thesis of ZnO nanorings can be realized. A room temperature photoluminescence (PL) spectrum of ZnO obtained shows that the full width at half maximum (FWHM) of the UV emission (～7 nm) is much narrower than that of commercial ZnO bulk crystals (～18 nm). The narrow FWHM confirms the uniformity and narrow size distribution of the synthesized ZnO crystals.