摘要
首次提出了一种利用非离子表面活性剂聚乙二醇(分子量:20 000)(PEG Mw20 000)为助生长剂,通过还原剂水合肼(N2H4)还原新生成的Cu(OH)2大规模合成半导体Cu2O纳米线的新方法.用TEM和HRTEM研究了所合成的Cu2O纳米线的形貌和结晶性,并用FT-IR红外吸收谱研究了纳米线的红外吸收特性,用纳米材料的量子效应和表面效应对FT-IR红外吸收谱中的蓝移现象作了解释.讨论了表面活性剂PEG的作用,由此详细研究了Cu2O纳米线的生长机制,指出Cu2O纳米线是由于吸附在PEG长链上的Cu2O纳米粒子通过彼此间的相互连接沿着PEG长链自组装而形成的.
A new method for the synthesis of Cu2O nanowires by the redox reaction of fresh Cu（OH）2 with hydrazine hydration as the reduction agent in which the nonionic surfactant poly （ethylene glycol） （PEG： Mw 20000） was used as soft template has been developed for the first time. The morphology, crystallinity and the IR absorption of the as-prepared Cu2O nanowires were characterized by TEM, HRTEM and FT-IR. FT-IR study indicated that character absorption of the as-prepared nanowires is blue- shifted comparative with that of bulk crystal Cu2O. We gave a rational explanation for this phenomenon by using quantum effect and surface effect of the nanostructured materials. We also investigated the role of surfactant PEG in the formation of the Cu2O nanowires. The growth mechanism of nanowires was discussed in detail and given as follows： Cu2O nanoparticles formed through reduction reaction attach to the long chains fabricated by surfactant PEG in water and these adjacent nanoparticles self-assemble together along the long chains to form the final Cu2O nanowires.
出处
《中央民族大学学报（自然科学版）》
2007年第2期101-107,共7页
Journal of Minzu University of China(Natural Sciences Edition)
基金
中央民族大学青年教师科研资助项目(No.CUN0210)
关键词
一维纳米结构
半导体
液相合成
量子效应
one-dimensional nanostructures
semiconductor
solution phase synthesis
quantum effect
