Method using laser interference to induce electrochemical deposition so as to prepare periodic and patterned Fe3O4 nano particles

Abstract

The invention relates to a method using laser interference to induce electrochemical deposition so as to prepare periodic and patterned Fe3O4 nano particles. The method is characterized in that the light-induced dielectrophoresis and electrochemical deposition technologies are used, a laser interference light source is used as the induction light source, an ITO conductive substrate plated with hydrogenated amorphous silicon thin film is used as the working electrode, a saturated calomel electrode is used as the reference electrode, a high-purity iron sheet is used as the counter electrode, the mixed solution of FeCl2 and FeCl3 is used as the electrolyte, the induction light source is projected to the hydrogenated amorphous silicon thin film, and a photoelectric effect is used to allow an exposure part to generate a virtual electrode; chronoamperometry is used to perform electrochemical deposition on the virtual electrode to generate the Fe3O4 nano particles, and an ordered Fe3O4 nano particle array consistent with a laser interference pattern is obtained. The method has the advantages that the method is simple in equipment and low in preparation cost, high-temperature heating or annealing is not needed, used chemicals are nontoxic and harmless, and the prepared patterned ordered Fe3O4 nano particle array is good in reproducibility and stability.

Description

technical field [0001] The invention relates to a method of using laser interference to induce electrochemical deposition to realize periodic patterned ordered Fe 3 o 4 The invention relates to a method for preparing a nano particle array, which belongs to the technical field of nano material preparation. Background technique [0002] In nature, iron oxides exist in many forms. Magnetite (Fe 3 o 4 ) and maghemite (γ-Fe 2 o 3 ) has been widely concerned by researchers, especially Fe 3 o 4 Due to its nanometer size, high surface area / volume ratio, superparamagnetism, easy synthesis, easy surface modification, low toxicity, good chemical stability, and good biological adaptability, it is widely used in magnetic recording, catalysis, biomedicine, biotechnology, sewage Processing has great application prospects. If some polymers with functional groups are wrapped on its periphery, it can be used in the field of medicine, especially in the detection and separation of canc...

AI Technical Summary

Problems solved by technology

[0003] Currently about magnetic Fe 3 o 4 There are many methods for the preparation of nanoparticles, which are divided into physical methods and chemical methods. Due to the shortcomings of the particle size distribution of the nanoparticles prepared by the physical method, the prepared nanomaterials cannot meet the needs of people for their performance research and material refinement applications. , so people are now paying more attention to the preparation of chemical methods. Common chemical methods include precipitation method, microemulsion method, solvothermal method, organic precursor thermal decomposition method and hydrothermal method, etc.

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