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Application of fluorescent silica nanoparticles as anti-fake mark

A technology of silicon nanoparticles and anti-counterfeiting marks, which is applied in the field of silicon nanomaterials to achieve good anti-counterfeiting effects, good fluorescent properties, and high quantum yields

Inactive Publication Date: 2015-05-13
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no report about the application of fluorescent silicon nanoparticles as anti-counterfeiting marks.

Method used

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  • Application of fluorescent silica nanoparticles as anti-fake mark
  • Application of fluorescent silica nanoparticles as anti-fake mark

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Preparation of fluorescent silicon nanoparticles

[0019] After crushing the rice husk, wash it with deionized water, add 38wt%-5wt% hydrochloric acid, and heat it in a water bath for 1h-10h; wash the acid-treated sample with deionized water until it is neutral, put it in a porcelain crucible, and wash it with alcohol. The lamp is heated until the sample turns into white powder; take a small amount of white powder, add 0.1mol / L-10mol / L NaOH solution, and heat it with microwave radiation for 30min-20h at a power of 15W-1000W and a temperature of 100°C-160°C to obtain a water-soluble permanent silicon nanoparticles.

[0020] (2) Using silicon nanoparticles for anti-counterfeiting preparation

[0021] The prepared fluorescent silicon nanoparticles were used as anti-counterfeiting ink for printing patterns.

Embodiment 2

[0023] (1) Preparation of fluorescent silicon nanoparticles

[0024] After crushing the wheat straw, wash it with deionized water, add 38wt%-5wt% hydrochloric acid, and heat it in a water bath for 1h-10h; wash the acid-treated sample with deionized water until it is neutral, put it in a porcelain crucible, and wash it with alcohol The lamp is heated until the sample turns into white powder; take a small amount of white powder, add 0.1mol / L-10mol / L NaOH solution, and heat it with microwave radiation for 30min-20h at a power of 15W-1000W and a temperature of 100°C-160°C to obtain a water-soluble permanent silicon nanoparticles.

[0025] (2) Using silicon nanoparticles for anti-counterfeiting

[0026] The prepared fluorescent silicon nanoparticles were used as anti-counterfeiting ink for printing patterns.

Embodiment 3

[0028] (1) Preparation of fluorescent silicon nanoparticles

[0029] Crush the bagasse and wash it with deionized water, add 38wt%-5wt% hydrochloric acid, heat in a water bath for 1h-10h; wash the acid-treated sample with deionized water until it is neutral, put it in a porcelain crucible, and wash it with alcohol The lamp is heated until the sample turns into white powder; take a small amount of white powder, add 0.1mol / L-10mol / L NaOH solution, and heat it with microwave radiation for 30min-20h at a power of 15W-1000W and a temperature of 100°C-160°C to obtain a water-soluble permanent silicon nanoparticles.

[0030] (2) Using silicon nanoparticles for anti-counterfeiting

[0031] The prepared fluorescent silicon nanoparticles were used as anti-counterfeiting ink for printing patterns.

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PUM

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Abstract

The invention discloses application of fluorescent silica nanoparticles as an anti-fake mark. The fluorescent silica nanoparticles are prepared from a silicon source, and the obtained fluorescent silica nanoparticles are used for preparing anti-fake patterns by using anti-fake ink. The fluorescent silica nanoparticles are excellent in luminescent property, high in quantum yield and good in storage stability, and have good excitation wavelength dependency; the prepared anti-fake patterns can display light of different colors under the illumination of different laser wavelengths, and can achieve a good anti-fake effect.

Description

technical field [0001] The invention belongs to the technical field of silicon nanometer materials, and relates to the application of fluorescent silicon nanometer particles, in particular to the application of fluorescent silicon nanometer particles as anti-counterfeiting marks. Background technique [0002] Functionalized silicon nanomaterials have unique properties such as good optical / electrical / mechanical properties, surface modification and good compatibility, so people have a strong interest in functionalized silicon nanomaterials (see: Pavesi , L.; Negro, L.D.; Mazzoleni, C.; Franzo, G.; Priolo, F. Nature 2000, 408, 440-444. Ding, Z.F.; Quinn, B.M.; Haram, S.K.; Pell, L.E.; , A.J.Science 2002, 296, 1293-1297.Ma, D.D.D.; Lee, C.S.; Au, F.C.K.; G.H.; Fang, Y.; Greytak, A.B.; Zheng, G.F.; Lieber, C.M. Science 2006, 313, 1100-1104.). What deserves special attention is that fluorescent silicon nanoparticles, as a representative zero-dimensional silicon nanomaterial, are...

Claims

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Application Information

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IPC IPC(8): C09D11/50
CPCC09D11/50
Inventor 何耀吴彦燕钟旖菱宋斌吴思聪
Owner SUZHOU UNIV
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