Anti-counterfeiting labels with controllable and anti-interference coding information based on core-shell Ag@SiO₂...

Area of Science:

• Materials Science
• Nanotechnology
• Spectroscopy

Background:

• Surface-enhanced Raman scattering (SERS) spectroscopy is a powerful analytical technique.
• Developing robust anti-counterfeiting measures is crucial for product security.
• Core-shell nanomaterials offer unique properties for advanced applications.

Purpose of the Study:

• To develop and evaluate Ag@SiO2 nanomaterials for anti-counterfeiting applications.
• To integrate SERS spectroscopy with Ag@SiO2 nanomaterials for security labels.
• To demonstrate the stability and encoding capabilities of the proposed system.

Main Methods:

• Fabrication of core-shell Ag@SiO2 nanomaterials.
• Integration of Ag@SiO2 nanomaterials with Raman reporters into security labels.
• Characterization of nanomaterial stability and anti-interference properties.
• Demonstration of flexible encoding using different probe molecules.

Main Results:

• Ag@SiO2 nanomaterials exhibit good stability and excellent anti-interference properties.
• Security labels embedded with Ag@SiO2 and Raman reporters provide specific and abundant encoding.
• Encoding information can be flexibly controlled by adjusting probe molecules.
• The Ag@SiO2 system shows excellent stability in organic solvents and can be used in ink.

Conclusions:

• Ag@SiO2 nanomaterials integrated with SERS spectroscopy are highly promising for anti-counterfeiting.
• The developed security labels offer enhanced security through customizable encoding and stability.
• The system's compatibility with ink broadens its applicability in anti-counterfeiting solutions.