Preparation method of noble metal nano-particle array

The invention provides a method for preparing a nano-particle array with adjustable size, shape and material type. The method comprises the following steps: preparing a two-dimensional single layer of hexagonal dense structural template with single grain size on a substrate through utilizing self-assembly between polystyrene colloid balls, depositing a noble metal film on the template, and ultrasonically removing a colloid ball mask board with an organic solvent so as to obtain a triangular noble metal nano-particle array on the substrate. The ultrasonic treated polystyrene colloid balls are immersed into chloroform solution to dissolve colloid balls so as to obtain a bowl-shaped shell layer noble metal nano-array. According to the method, the polystyrene colloid balls are not tightly arranged through ion etching/annealing technical manners, so that an annular noble metal nano-particle array is formed on the substrate. The ordered nano-particle array has wide application prospect on chemical and biological sensors, ultra-high density data memory mediums, photo-electric devices and chemical catalysts.