Li Gao-Ren, Tong Ye-Xiang, Kay Lin-Gang, Liu Guan-Kun
School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
J Phys Chem B. 2006 May 11;110(18):8965-70. doi: 10.1021/jp060411n.
There have been few reports on Bi-Fe intermetallic compounds because Bi and Fe are immiscible in the equilibrium states and neither alloy nor intermetallic compound exists in the binary system. In this paper, we show that, by using the nanometer-scale templates based synthesis in conjunction with the electrochemical deposition, it is possible to mix in solid solution elements that are immiscible in traditional fabrication methods. The preparation of Bi-Fe intermetallic compound nanowire arrays was investigated via an electrodeposition route by using a polycarbonate (PC) membrane template. Cyclic voltammetry, potentiostatic transient, and potentiostatic stripping were used to study the formation of Bi(x)Fe(1-x) intermetallic compounds. The compositions of Bi(1-x)Fe(x) intermetallic compound nanowire arrays were sensitive to the bath compositions and the electrodeposition potentials, and the length could be easily adjusted by varying the electrodeposition time. The electrodeposited Bi(1-x)Fe(x) intermetallic compound nanowire arrays had a parallel-to-the-wire easy magnetization. Furthermore, the spin-glass such as behavior and an unusually large characteristic time, which was about 5.26 h, were found in Bi(1-x)Fe(x) intermetallic compound nanowire arrays at room temperature.
关于铋铁金属间化合物的报道很少，因为铋和铁在平衡状态下是不互溶的，二元体系中既不存在合金也不存在金属间化合物。在本文中，我们表明，通过将基于纳米尺度模板的合成与电化学沉积相结合，可以在固溶体中混合在传统制造方法中不互溶的元素。通过使用聚碳酸酯（PC）膜模板，通过电沉积路线研究了铋铁金属间化合物纳米线阵列的制备。采用循环伏安法、恒电位瞬变法和恒电位溶出法研究了Bi(x)Fe(1-x)金属间化合物的形成。Bi(1-x)Fe(x)金属间化合物纳米线阵列的组成对镀液组成和电沉积电位敏感，并且可以通过改变电沉积时间轻松调整长度。电沉积的Bi(1-x)Fe(x)金属间化合物纳米线阵列具有平行于线的易磁化方向。此外，在室温下，Bi(1-x)Fe(x)金属间化合物纳米线阵列中发现了类似自旋玻璃的行为和异常大的特征时间，约为5.26小时。
