Application of one-dimensional fusiform silicon nanomaterials as anti-counterfeiting ink
A silicon nanometer and fusiform technology, applied in the field of silicon nanomaterials, can solve the problems of difficulty in achieving diversified anti-counterfeiting effects, high difficulty in synthesizing inorganic fluorescent materials, poor fluorescence stability, etc., achieving good excitation wavelength dependence, realizing long-range anti-counterfeiting, The effect of good fluorescent properties
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Embodiment 1
[0026] (1) Preparation of one-dimensional fusiform fluorescent silicon nanomaterials
[0027] Add 3ml of aminopropyltrimethoxysilane to 25ml of a nitrogen-protected solution in which 0.5g of trisodium citrate dihydrate is dissolved, then add 1ml of 0.1M ferric chloride solution, and fully stir overnight.
[0028] The reaction precursor solution is placed in a microwave reactor, and the control conditions are as follows:
[0029] Microwave power: 100W; Reaction temperature: 150°C; Reaction time: 15min.
[0030] The material obtained from the reaction was dialyzed to neutral in deionized water to obtain the final product.
[0031] (2) Using one-dimensional fusiform fluorescent silicon nanomaterials for anti-counterfeiting preparation
[0032] The prepared one-dimensional fusiform fluorescent silicon nanomaterials with excitation wavelength dependence were used as anti-counterfeiting ink to carry out anti-counterfeiting dyeing of leaf veins and plant fibers.
Embodiment 2
[0034] (1) Preparation of one-dimensional fusiform fluorescent silicon nanomaterials
[0035] Add 3ml of aminopropyltrimethoxysilane to 25ml of a nitrogen-protected solution dissolved in 3.5g of trisodium citrate dihydrate, then add 0.8ml of 0.1M ferric nitrate solution, and stir overnight.
[0036] The reaction precursor solution is placed in a microwave reactor, and the control conditions are as follows:
[0037] Microwave power: 100W; Reaction temperature: 150°C; Reaction time: 15min.
[0038] The material obtained from the reaction was dialyzed to neutral in deionized water to obtain the final product.
[0039] (2) Using one-dimensional fusiform fluorescent silicon nanomaterials for anti-counterfeiting preparation
[0040] The prepared one-dimensional fusiform fluorescent silicon nanomaterial with excitation wavelength dependence is injected into the ink cartridge of an inkjet printer as anti-counterfeiting ink, and various anti-counterfeiting patterns are printed out by...
Embodiment 3
[0042] (1) Preparation of one-dimensional fusiform fluorescent silicon nanomaterials
[0043] Add 3ml of aminopropyltrimethoxysilane to 25ml of citric acid solution dissolved in 0.6g of citric acid protected by nitrogen, then add 1ml of 0.1M ferric chloride solution, and stir thoroughly overnight.
[0044] The reaction precursor solution is placed in a microwave reactor, and the control conditions are as follows:
[0045] Microwave power: 100W; Reaction temperature: 150°C; Reaction time: 15min.
[0046] The material obtained from the reaction was dialyzed to neutral in deionized water to obtain the final product.
[0047] (2) Using one-dimensional fusiform fluorescent silicon nanomaterials for anti-counterfeiting preparation
[0048] The prepared one-dimensional fusiform fluorescent silicon nanomaterials with excitation wavelength dependence are used as anti-counterfeiting ink to obtain anti-counterfeiting patterns and characters through ordinary stamps.
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