Hiralal P, Unalan H E, Wijayantha K G U, Kursumovic A, Jefferson D, Macmanus-Driscoll J L, Amaratunga G A J
Electrical Engineering Division, Department of Engineering, University of Cambridge, 9 J J Thomson Avenue, Cambridge CB3 0FA, UK.
Nanotechnology. 2008 Nov 12;19(45):455608. doi: 10.1088/0957-4484/19/45/455608. Epub 2008 Oct 9.
A simple, catalyst-free growth method for vertically aligned, highly crystalline iron oxide (α-Fe(2)O(3)) wires and needles is reported. Wires are grown by the thermal oxidation of iron foils. Growth properties are studied as a function of temperature, growth time and oxygen partial pressure. The size, morphology and density of the nanostructures can be controlled by varying growth temperature and time. Oxygen partial pressure shows no effect on the morphology of resulting nanostructures, although the oxide thickness increases with oxygen partial pressure. Additionally, by using sputtered iron films, the possibility of growth and patterning on a range of different substrates is demonstrated. Growth conditions can be adapted to less tolerant substrates by using lower temperatures and longer growth time. The results provide some insight into the mechanism of growth.
报道了一种简单的、无催化剂的生长方法，用于垂直排列的、高度结晶的氧化铁（α-Fe₂O₃）线和针。通过铁箔的热氧化生长线。研究了生长特性与温度、生长时间和氧分压的关系。通过改变生长温度和时间，可以控制纳米结构的尺寸、形态和密度。尽管氧化物厚度随氧分压增加，但氧分压对所得纳米结构的形态没有影响。此外，通过使用溅射铁膜，证明了在一系列不同衬底上生长和图案化的可能性。通过使用较低温度和较长生长时间，生长条件可以适应耐受性较差的衬底。这些结果为生长机制提供了一些见解。
