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以一种新的硅微米/纳米结构复合体系——硅纳米孔柱阵列作为还原性衬底,采用浸渍技术制备出一种自支撑的金纳米薄膜,并对其表面形貌和结构进行了表征.实验表明,金纳米薄膜的制备过程是一个自终止过程.当硅纳米孔柱阵列被耗尽后,浸渍溶液中Au3+的还原反应将自行终止;同时,所形成的金纳米薄膜自动与衬底脱离并成为一种自支撑薄膜.薄膜的形成机理被归因于硅纳米孔柱阵列所具有的高的表面活性和还原性.用能量弥散x射线谱对薄膜表面化学成分分析的结果表明,如此制备的金纳米薄膜具有很强的氮吸附和氮储存能力.这一特性有可能在气体传感器、空气分离和氮纯化以及氮化合物的膜合成器等技术领域得到应用.
A novel self-supporting gold nanofilm was prepared by impregnation technique using a new silicon / nanostructured composite-Si nanopore array as the reductive substrate. The morphology and structure of the surface were characterized The experiment shows that the preparation process of gold nanometer thin film is a self-terminating process.When the array of silicon nanopore columns is depleted, the reduction reaction of Au3 + in the immersing solution will terminate itself. At the same time, Off and become a self-supporting film.The formation mechanism of the film is attributed to the high surface activity and reducibility of the silicon nanopore array.The results of the chemical composition analysis on the surface of the film by energy dispersive x-ray spectroscopy show that, The prepared gold nanofilms have strong ability of nitrogen adsorption and nitrogen storage, which may be applied in gas sensor, air separation and nitrogen purification and nitrogen compound membrane synthesizer and other technical fields.