FFT-impedance spectroscopy analysis of the growth of magnetic metal nanowires in ultra-high aspect ratio InP membranes
FFT-impedance spectroscopy analysis of the growth of magnetic metal nanowires in ultra-high aspect ratio InP membranes
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DOI：
10.1088/0268-1242/31/1/014005
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发表时间：
2015
影响因子：
1.9
通讯作者：
M. Gerngross;J. Carstensen;H. Föll;R. Adelung
中科院分区：
文献类型：
--
作者：
M. Gerngross;J. Carstensen;H. Föll;R. Adelung
本文报道了在75 Hz ~ 18.5 kHz的典型频率范围内，利用原位快速傅立叶变换阻抗谱对超高纵横比InP膜中磁性纳米线的电化学生长过程进行了表征。Ni， Co和FeCo的测量阻抗数据可以使用相同的等效电路很好地拟合，该等效电路由串联连接到rc元件和Maxwell元件的串联电阻组成。阻抗数据清楚地显示了Ni、Co和FeCo纳米线在超高纵横比InP膜中的生长行为的相似性——硼酸对超高纵横比InP膜中金属沉积的有利影响和硼酸的扩散限制，以及钝化或副反应等差异。
This paper reports on the characterization of the electrochemical growth process of magnetic nanowires in ultra-high-aspect ratio InP membranes via in situ fast Fourier transform impedance spectroscopy in a typical frequency range from 75 Hz to 18.5 kHz. The measured impedance data from the Ni, Co, and FeCo can be very well fitted using the same electric equivalent circuit consisting of a series resistance in serial connection to an RC-element and a Maxwell element. The impedance data clearly indicate the similarities in the growth behavior of Ni, Co and FeCo nanowires in ultra-high aspect ratio InP membranes—the beneficial impact of boric acid on the metal deposition in ultra-high aspect ratio membranes and the diffusion limitation of boric acid, as well as differences such as passivation or side reactions.