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Fabrication and Physical Properties of Single-Crystalline Βeta-FeSi 2 Nanowires
Nanoscale Research Letters ( IF 5.418 ) Pub Date : 2020-10-14 , DOI: 10.1186/s11671-020-03425-7
Chih-Yung Yang , Shu-Meng Yang , Yu-Yang Chen , Kuo-Chang Lu

In this study, self-catalyzed β-FeSi2 nanowires, having been wanted but seldom achieved in a furnace, were synthesized via chemical vapor deposition method where the fabrication of β-FeSi2 nanowires occurred on Si (100) substrates through the decomposition of the single-source precursor of anhydrous FeCl3 powders at 750–950 °C. We carefully varied temperatures, duration time, and the flow rates of carrier gases to control and investigate the growth of the nanowires. The morphology of the β-FeSi2 nanowires was observed with scanning electron microscopy (SEM), while the structure of them was analyzed with X-ray diffraction (XRD) and transmission electron microscopy (TEM). The growth mechanism has been proposed and the physical properties of the iron disilicide nanowires were measured as well. In terms of the magnetization of β-FeSi2, nanowires were found to be different from bulk and thin film; additionally, longer β-FeSi2 nanowires possessed better magnetic properties, showing the room-temperature ferromagnetic behavior. Field emission measurements demonstrate that β-FeSi2 nanowires can be applied in field emitters.



中文翻译:

单晶Β-FeSi2纳米线的制备及物理性能

在这项研究中,自催化β-硅铁2个纳米线,已经被通缉但在炉中很少实现,通过化学气相沉积法合成β-硅铁的制造,其中2个纳米线发生在Si(100)衬底上通过的分解750–950°C下无水FeCl 3粉末的单源前体。我们小心地改变温度,持续时间和载气的流速,以控制和研究纳米线的生长。所述的形态β-硅铁2用扫描电子显微镜(SEM)观察纳米线,同时用X射线衍射(XRD)和透射电子显微镜(TEM)分析纳米线的结构。已经提出了生长机理并且还测量了二硅化铁纳米线的物理性质。在β-硅铁的磁化而言2,发现纳米线是从大容量和薄膜不同; 另外,较长的β-硅铁2个纳米线具有更好的磁性能,显示出的室温铁磁行为。场致发射的测量表明,β-硅铁2纳米线可以在场致发射体被应用。

更新日期:2020-10-14
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