Details

Autor(en) / Beteiligte

• Christensen, Peter R.
• Wolf, Michael O.

Titel

Photopatterned Multidimensional Fluorescent Images

Ist Teil von

• Advanced functional materials, 2016-12, Vol.26 (46), p.8471-8477

Ort / Verlag

Blackwell Publishing Ltd

Erscheinungsjahr

2016

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• New methods that yield covert fluorescent images are of significant interest for applications in anti‐counterfeit technology. Printing methods that offer access to spatially controlled fluorescence intensity are needed in order to accurately reproduce unique and complex images. Herein, the use of photoreactive inks containing 9,9′‐bis(anthracene)sulfoxide (AnSO) to create complex images with spatially controlled fluorescence intensity is presented. Under UV irradiation, the SO‐bridge between anthracene units in AnSO is extruded to yield the highly luminescent molecule 9,9′‐bianthryl (BA) in quantitative yields. The irreversible formation of BA is leveraged to create multidimensional fluorescent security features that can be patterned using light and easily interpreted using the CCD camera of a mobile phone. Inks containing 9,9′‐bis(anthracene)sulfoxide (AnSO) are deposited and photopatterned to create multidimensional photoluminescent barcodes and images. Spatially controlled fluorescence intensity is achieved, allowing complex images to be patterned. Simple ink formulations containing AnSO are used to generate covert 3D barcodes for anti‐counterfeit applications, which can be easily read using mobile phones.