摘要
通过简单的实验方法在玻璃衬底上得到了钾钨青铜(KxWO3)纳米线。利用透射电镜选区电子衍射方法结合明场像及高分辨电子显微像分析确定了KxWO3纳米线的结构及生长方向,发现KxWO3纳米线具有有序的单斜超结构,该单斜KxWO3相以[001]m为孪晶轴的120°三次旋转孪晶的形式存在,纳米线的生长方向为[001]m。通过暗场像分析,确定了纳米线是由更小尺度的纳米单元构成的。根据透射电子显微分析结果并结合实验过程,对KxWO3纳米线可能的形成机制进行了讨论。
Potassium tungsten bronze（KxWO3） nanowires were obtained using a simple method on glass substrates.The structure and growth direction of the nanowires were investigated by selected area electron diffraction method,combined with bright field and high resolution transmission electron microscopy techniques.It is noted that KxWO3 nanowires possess an ordered monoclinic super-structure and grow along the m direction.The monoclinic KxWO3 phase exists in the form of 120° rotational twinning variants with m as the twinning axis.Each single wire is composed of numerous thinner nanowires according to dark field images analysis.Considering the transmission electron microscopy analysis and growth process,the formation mechanism of the novel KxWO3 twinning nanowires is proposed.
出处
《电子显微学报》
CAS
CSCD
2012年第4期286-293,共8页
Journal of Chinese Electron Microscopy Society
基金
教育部新世纪优秀人才支持计划(NCET-07-0640)
教育部博士点基金项目(20090141110059)
国家自然科学基金资助项目(Nos.51071110,40972044,J0830310)
973项目(2011CB933300)
