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Anti-counterfeit label based on patterned metal nanocomposite and production method of anti-counterfeit label

A nano-composite material and patterned metal technology, applied in the field of anti-counterfeiting signs, can solve the problems of easy forgery of technology, achieve high anti-counterfeiting level, easy to use, and enhance the effect of Raman scattering activity

Active Publication Date: 2015-12-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in general, these technologies are easy to counterfeit

Method used

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  • Anti-counterfeit label based on patterned metal nanocomposite and production method of anti-counterfeit label
  • Anti-counterfeit label based on patterned metal nanocomposite and production method of anti-counterfeit label
  • Anti-counterfeit label based on patterned metal nanocomposite and production method of anti-counterfeit label

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment one (as figure 2 shown):

[0055] (1) Substrate cleaning: Clean the glass or silicon wafer with Piranha washing solution (concentrated sulfuric acid / hydrogen peroxide, 4:1, 60°C, 20min) and hydrophilic treatment (hydrogen peroxide / water / concentrated ammonia water, 1:5:1 ,60min) and then ready for use;

[0056] (2) Preparation of polystyrene ball array: place the cleaned substrate surface on a horizontal platform, and add a certain amount of water to form a water film covering the entire substrate surface. On the water film air / liquid interface, use a syringe pump and a microsyringe to slowly inject a monodisperse polystyrene sphere suspension (containing 10 to 20% ethanol) with a diameter of 200 to 1000 nm at a speed of 10 to 30 μL / min. After the water film evaporates, an array of closely arranged polystyrene microspheres can be formed (see Figure 4 );

[0057] (3) Preparation of patterned polystyrene microsphere templates Use laser engraving to evapora...

Embodiment 2

[0063] Such as image 3 , the above-mentioned polystyrene template can also be transferred to the adhesive flexible substrate 8 by using an adhesive material to form a flexible patterned metal nanocomposite anti-counterfeiting material. The specific operations are as follows: steps (1) to (3) are the same as above, Adhesive acrylic tape on the prepared polystyrene ball template, peel off after light pressure, the polystyrene ball template can be transferred to these flexible materials. After coating, a flexible patterned metal nanocomposite anti-counterfeiting material can be prepared.

Embodiment example 3

[0065] In the above-mentioned embodiments, the 200 thick silver film is taken as an example to make this product, and other effect films that can generate surface plasmon resonance can also be used to make this product. Such as Figure 11 As shown in a, the thin film can be Au, Ag, Pt, Cu, Al, Cr pure metal, or a mixed metal layer of the above metals ( Figure 11 b), or non-metallic (SiO 2 、TiO 2 ) and metal composite coating ( Figure 11 c), or a multi-layer composite coating of non-metal and metal, with a total thickness between 20 and 1000 nm.

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Abstract

The invention discloses an anti-counterfeit label based on a patterned metal nanocomposite and a production method of the anti-counterfeit label. The anti-counterfeit label comprises a base material adopting a hard or flexible material and a patterned metal and polystyrene sphere composite nanostructure which is formed on the base material, wherein the patterned metal and polystyrene sphere composite nanostructure comprises a polystyrene microphere array coating the surface of the base material and a metal layer plated on the polystyrene microsphere array. The anti-counterfeit label is characterized in that colorful structured lights can be generated through a surface plasma resonance phenomenon, so as to form clear and recognizable pattern labels; a specific organic matter combination with Raman scattering activity is further added to be used for hiding or reading encrypted information at higher anti-counterfeit grades. As an anti-counterfeit label material, the anti-counterfeit label achieves multiple anti-counterfeit characteristics, has the characteristics of being high in anti-counterfeit grade, convenient to use, and the like, and can be widely applied to the industries of pharmacy, food, aircraft parts, automobile parts, brand-name clothes, luxuries, artworks, and the like.

Description

technical field [0001] The present invention relates to an anti-counterfeiting mark and a manufacturing method thereof, to an anti-counterfeiting mark based on a patterned metal nanocomposite material and a manufacturing method thereof, in which a patterned metal nanostructure is made by using the special optical properties of the metal nanostructure as an anti-counterfeiting logo. Background technique [0002] Counterfeit products are a global problem that affects individuals and communities from small villages and major cities all the way to large retail stores and pharmaceutical companies. The twin effects of globalization and the growth of Internet transactions have made the problem considerably more acute. Counterfeit products that are not regulated can also enter the legitimate supply chain through channels around the world. In many cases, this is very difficult to distinguish from genuine products. In 2007 alone, about 7-10% of the goods in the world were counterfei...

Claims

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Application Information

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IPC IPC(8): G09F3/02
CPCG09F3/0291
Inventor 刘湘江杨丹婷谢丽娟应义斌
Owner ZHEJIANG UNIV
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