中文摘要：

利用水和二茂铁作原料,通过化学气相沉积的方法在950℃以上可以在二氧化硅表面上制备出二氧化铁纳米颗粒组成的圆形图形.研究发现,这些圆形图形的特点,包括图形的平均尺寸和尺寸分布、图形之间的平均间隔、以及组成这些图形的氧化铁纳米颗粒的大小等,同沉积温度、水和二茂铁的比例等密切相关.通过调整这些实验参数,我们在较大面积的二氧化硅基片上成功地制备出氧化铁纳米颗粒的圆形图形阵列.这些圆形图形阵列有可能作为纳米碳管等一维材料的制备模板.这些图形以及组成它们的纳米颗粒的特点有可能对沉积的纳米材料的形貌和性能等产生影响.

英文摘要：

Circular patterns of α-Fe2O3 nanoparticles were formed by chemical vapor deposition from a mixture of water and ferrocene on silica surface at temperatures above 950 ℃. The features of the patterns, e.g., the average size and size distribution,the average separation distance and the size of the α-Fe2 O3 nanoparticles forming the patterns, were found to be dependent on deposition conditions such as the deposition temperature and the ratio of water/ferrocene, etc. By adjusting these deposition conditions, large-scale circular patterns of α-Fe2 O3 nanoparticles were successfully created on the silica substrate. These patterns might serve as submicron templates for growing low-dimensional materials such as carbon nanotubes. The features of the patterns and the Fe2 O3 particles could profoundly affect the topologies and performances of the nanostructures which are nested on them.