利用硅纳米孔柱阵列(Si-NPA)表面规则的图案化形貌和还原性,采用浸渍沉积技术制备了具有三种不同表面结构特征的Ag/Si-NPA复合纳米体系.在未经清洗的Si-NPA衬底,沉积银的形貌为树枝状;在新鲜衬底和自然老化衬底上,银的沉积都会形成规则的手链网络;而经过强氧化处理的衬底上则不能实现银的浸渍沉积.分析表明,Si-NPA表面的规则阵列和多孔结构等几何构型,在样品的后处理过程中将导致样品表面氧化程度随空间几何位置出现周期性梯度分布,从而对浸渍溶液中银离子在不同几何特征区域的还原、成核及生长模式产生控制作用,最终导致了银在Si-NPA表面浸渍沉积的位置选择性.本研究为采用浸渍沉积技术制备周期性、图案化的金属/硅复合纳米体系,研究其物理性能并探索其可能的器件应用奠定了基础.
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