Issue 44, 2019

Single excitable dual emissive novel luminescent pigment to generate advanced security features for anti-counterfeiting applications

Abstract

A novel strategy has been devised to develop a single excitable dual emissive luminescent pigment for the formulation of unclonable security ink. The new advanced security features of the ink have been demonstrated successfully and make it highly suitable for the printing of valuable products, such as currency, passports, pharmaceuticals, and so forth for protection against duplicity. The formulation of the single excitable dual emissive luminescent pigment is based on the unexplored combinatory concept of the fluorescence@phosphorescence phenomenon, which provides a new feature in the composite. It emits intense red color (611 nm) upon illumination with a 254 nm UV lamp excitation source and long persisting green color (532 nm) when the excitation source is switched off. To study the feasibility of the single excitable dual emissive luminescent security ink for commercial applications, the patterns printed using this ink were not only subjected to rigorous atmospheric conditions such as hot, cold and humid conditions for six months, but also examined after treatment with various bleaching agents (ethyl alcohol, ethyl acetate, xylene, acetone, soap solution and laundry detergent) to ensure their chemical stability. The security features printed using the single excitable dual emissive luminescent security ink were found to be very stable against all of these stringent conditions. Hence, the exceptional results obtained using the single excitable dual emissive luminescent security ink offer a new pathway to prevent counterfeiting by generating advanced security features.

Graphical abstract: Single excitable dual emissive novel luminescent pigment to generate advanced security features for anti-counterfeiting applications

Supplementary files

Article information

Article type
Paper
Submitted
13 Aug 2019
Accepted
10 Oct 2019
First published
10 Oct 2019

J. Mater. Chem. C, 2019,7, 13867-13877

Single excitable dual emissive novel luminescent pigment to generate advanced security features for anti-counterfeiting applications

A. K. Gangwar, Kanika, G. Kedawat, G. S. Papanai and B. K. Gupta, J. Mater. Chem. C, 2019, 7, 13867 DOI: 10.1039/C9TC04492B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements