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Author Spotlight: Eco-friendly Photoluminescent Textile Authentication with Curcumin

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Highly bright solid-state carbon dots for efficient anticounterfeiting.

Weihua Li^1,2, Yuanyuan Han^1,2, Lihua Wang^1,2

¹College of Textiles and Clothes, College of Physics, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University No. 308 Ningxia Road Qingdao 266071 P. R. China xh_wang@qdu.edu.cn hgzhao@qdu.edu.cn.

|January 4, 2024

Summary

This summary is machine-generated.

This study presents carbon dots (C-dots) with high quantum yields for solid-state applications. Researchers developed methods to overcome aggregation-caused quenching, enabling secure anti-counterfeiting technologies.

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Area of Science:

Materials Science
Nanotechnology
Optoelectronics

Background:

Carbon dots (C-dots) are attractive fluorescent nanomaterials due to low toxicity and good optoelectronic properties.
Aggregation-caused quenching (ACQ) in solid-state C-dots hinders their use in devices like anti-counterfeiting and optoelectronics.

Purpose of the Study:

To develop solid-state carbon dots that overcome ACQ.
To explore the potential of these C-dots in advanced applications such as anti-counterfeiting and information encryption.

Main Methods:

Preparation of C-dot powder via dispersion in a polymer matrix.
In situ formation of C-dot/Ca-complex using vacuum heating with boric acid.
Characterization of photoluminescent (PL) properties, including temperature-dependent behavior and quantum yields (QYs).

Main Results:

C-dots with high QYs (40-67%) were successfully prepared.
Temperature-dependent PL properties were observed.
A flexible anti-counterfeiting code was fabricated using the synthesized C-dots, demonstrating high security.

Conclusions:

The developed methods effectively mitigate ACQ in solid-state C-dots.
The C-dots exhibit promising potential for solid-state information storage, anti-information encryption, and anti-counterfeiting applications.