Method for preparing metal nanometer particles with hexagonal network in lattice distribution on substrate

Abstract

The invention relates to a method for preparing metal nanometer particles with hexagonal network in lattice distribution on a substrate, which belongs to the technical fields of nano-material preparation and application. The method comprises the following steps: preparing a layer of metal film by a physical vapor deposition method on the substrate with a hexagonal close-packing microsphere template, rapidly removing the template to obtain a triangle metal nanometer particles array which is orderly arrayed, introducing inert gas under the temperature below 30 DEG C-80 DEG C which is an eutectic point of the substrate and the metal material, performing a rapid thermal annealing treatment to the substrate disposed horizontally to obtain the nearly semispherical metal nanometer particles with hexagonal network in lattice distribution on the substrate. The method has the advantages of simple flow and mature technology which realizes adjustable density and diameter of the metal particles and well-regulated assignment. The invention has wide application prospects in the fields of nano-material engineering, novel energy development and the like.

Description

technical field [0001] The invention relates to a method for preparing metal nanoparticles distributed in a hexagonal network lattice on a substrate, and belongs to the technical field of preparation and application of nanomaterials. Background technique [0002] Two-dimensional discrete and ordered nano-metal particle lattices have broad application prospects in the fields of nanostructure solar cells, surface-enhanced Raman spectroscopy, surface plasmon resonance research, and preparation of ordered nanomaterials. To prepare an ordered array on a substrate by conventional methods, first obtain monodisperse metal particles, and then use a suitable process to arrange the particles in an orderly manner. However, few types of monodisperse metal nanoparticles have been successfully prepared, and its size and shape are not easy to control. It is very difficult to prepare monodisperse nanoparticles with a diameter greater than 30 nm. The metal catalytic particles required by the...

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Problems solved by technology

However, there are very few types of monodisperse metal nanoparticles that have been successfully prepared, and their size and shape are not easy to control. It is very difficult to prepare monodisperse nanoparticles with a diameter greater than 30 nm.

The metal catalytic particles required by the vapor-liquid-solid (VLS) growth method are generally obtained by high-temperature annealing of the metal film, and the diameters of the metal particles obtained in this way are different, and the distribution of the metal particles is random; Can solve this problem, but photolithography is expensive and inconvenient for large-scale adoption

Another person used the reverse porous template method to prepare an ordered metal nanoparticle array, but in the process of combining reactive ion etching technology, the whole experimental process is relatively complicated

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