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Synthesis and characterization of nanowires formed by self-assembled iron particles

机译：自组装铁颗粒形成的纳米线的合成与表征

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摘要

The formation of iron particles without and with carbon coating was studied in a hot wall flow reactor. The precursors ironpentacarbonyl (IPC, Fe(CO)_5) and ethylene (C_2H_4) both diluted in Na were used in a concentric tubular flow arrangement and were heated to temperatures between 570 and 1170 K at pressures between 50 and 500 mbar. In experiments without C_2H_4, either individual iron particles in the size range of 8 nm < = d_p < = 15 nm or long iron chains composed of several hundreds of individual iron particles were found depending on the reaction conditions. In experiments with C2H4 addition, these particles or particle chains were covered by a thin carbon/carbide layer. The size of the primary particles was measured in situ by time-resolved laser-induced incandescence (TR-LII) and ex situ by rapid thermophoretic particle probing and TEM imaging.
机译：在热壁流反应器中研究了没有和有碳涂层的铁颗粒的形成。均稀释在Na中的前体五羰基铁五羰基铁（IPC，Fe（CO）_5）和乙烯（C_2H_4）用于同心管状流动装置中，并在50至500 mbar的压力下加热至570至1170 K.在没有C_2H_4的实验中，根据反应条件，发现尺寸范围为8 nm <= d_p <= 15 nm的单个铁颗粒或由数百个单个铁颗粒组成的长铁链。在添加C2H4的实验中，这些颗粒或颗粒链被薄薄的碳/碳化物层覆盖。通过时间分辨激光诱导白炽灯（TR-LII）原位测量初级粒子的尺寸，通过快速热泳粒子探测和TEM成像在原位测量初级粒子的尺寸。

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