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

A technology of laser interference and nano-particles, which is applied in nano-technology, electrodes, electrolytic coatings, etc., can solve the problems that nano-materials cannot meet the needs of performance research, fine application, rough particle size distribution, etc., and achieve low preparation costs, simple equipment, and raw materials. Easy to get effect

Active Publication Date: 2017-01-25
CHANGCHUN UNIV OF SCI & TECH
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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 p

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

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[0033] The present invention will be described in detail below with reference to specific embodiments.

[0034] like figure 1 As shown, the present invention adopts a simple laser interference-induced electrochemical deposition to prepare patterned Fe 3 O 4 The nanoparticle approach is as follows:

[0035] (1) Preparation of electrodes: the ITO conductive substrate coated with hydrogenated amorphous silicon (a-Si:H) thin film was used as the working electrode; the high-purity iron sheet was used as the counter electrode; and the calomel electrode was used as the reference electrode. The surface area of ​​the ITO conductive substrate is 1 cm 2 , the square resistance is 4Ω, the thickness of the ITO film is 500nm, and the transmittance is 84%; the hydrogenated amorphous silicon (a-Si:H) film is deposited on the surface of ITO by PECVD method, the thickness is 500nm, and the dark state conductivity is 5E- 10S / cm, the photoconductivity under AM1.5G illumination is about 7E-5S / ...

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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...

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Application Information

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IPC IPC(8): C25D9/04C25D13/02B82Y40/00C25D17/10
CPCB82Y40/00C25D9/04C25D13/02C25D17/10
Inventor 王作斌王璐董莉彤孟庆玲翁占坤宋正勋许红梅李理
Owner CHANGCHUN UNIV OF SCI & TECH
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