固态离子学方法制备宏观银纳米线阵列

摘要

传统的拉曼增强基底均匀性差、排列无序和重复性差等缺点限制了拉曼增强机理的深入研究和广泛应用.选取具有高离子电导率的快离子导体RbAg4I5薄膜,利用固态离子学方法在不同外加电流(2μA、4 μA和6μA)作用下制备了宏观银纳米线阵列.利用扫描电子显微镜(SEM)观测银纳米线阵列的表面形貌,利用能量色散光谱仪(EDS)测量银纳米线阵列的化学成分.结果表明:随着外加电流的增加,分别制备了稀疏的无序排列银纳米线阵列,稀疏的有序排列银纳米线阵列和平行于表面密集排列的银纳米竹节簇阵列.外加电流为2μA和6μA时制备的银纳米线阵列表面均匀分布着纳米颗粒,直径从10～20 nm增大到50～100 nm.%The traditional Raman enhanced substrates have the disadvantages,such as low uniformity,disordered arrangement and poor repeatability,which restrict further research and the wide application of the Raman strengthening mechanism.Macroscopical silver nanowire arrays were obtained by a solid-state ionics method using fast ionic conductor RbAg4 I5 films with high ionic conductivity under the different impressed currents (2 μA,4 μA and 6 μA).The surface morphology and chemical composition of the silver nanowire arrays were characterized by scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS),respectively.The results showed that with the increase of impressed currents,sparse disordered silver nanowire arrays,sparse ordered silver nanowire arrays and densely arranged silver nano bamboo arrays parallel to the substrate surface were obtained.When the impressed current was 2 μA and 6 μA,nano particles with diameters of from 10～ 20 nm to 50 ～ 100 nm uniformly distributed on the surface of prepared silver nanowire arrays.