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Related Experiment Video

Updated: Feb 6, 2026

Fluorescence Lifetime Imaging of Molecular Rotors in Living Cells

Fluorescence Lifetime Imaging of Molecular Rotors in Living Cells

Published on: February 9, 2012

Carbon Dot Fluorescence-Lifetime-Encoded Anti-Counterfeiting.

Sergii Kalytchuk¹, Yu Wang¹, Kateřina Poláková¹

¹Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science , Palacký University Olomouc , Šlechtitelů 27 , 783 71 Olomouc , Czech Republic.

ACS Applied Materials & Interfaces

|August 8, 2018

Summary

This study introduces novel carbon dot (CD) fluorescent inks for advanced anti-counterfeiting. These inks use unique fluorescence lifetimes for secure authentication, offering high-level security performance.

Keywords:

anti-counterfeiting carbon dots colloidal nanomaterials lifetime spectroscopy photoluminescence

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Area of Science:

Nanomaterials Science
Analytical Chemistry
Security Technology

Background:

Carbon dots (CDs) are promising luminescent nanomaterials due to their high fluorescence quantum yield and low toxicity.
Existing anti-counterfeiting methods require improvement in security and authentication capabilities.

Purpose of the Study:

To develop a novel anti-counterfeiting strategy using fluorescence-lifetime-encoded carbon dot (CD) fluorescent inks.
To demonstrate a proof-of-concept anti-counterfeiting tag based on this technology.

Main Methods:

Synthesis of carbon dots (CDs) for fluorescent inks.
Encoding distinct fluorescence lifetimes into CD-based inks.
Authentication of security tags using fluorescence lifetime imaging.

Main Results:

CD-inks exhibited identical steady-state emission properties but unique, well-separated fluorescence lifetimes.
A functional anti-counterfeiting tag was successfully created using the lifetime-encoded CD inks.
The technology demonstrated high-level security performance for authentication.

Conclusions:

Fluorescence-lifetime-encoded CD inks offer a robust and novel approach for high-security anti-counterfeiting applications.
This method provides a secure authentication mechanism exclusively through fluorescence lifetime imaging.
The technology has potential applications in bioimaging, flow cytometry, and optical data storage.