Screen-printed nanoparticles as anti-counterfeiting tags

Nanotechnology
Carlos Campos-CuervaJesus Santamaria

Abstract

Metallic nanoparticles with different physical properties have been screen printed as authentication tags on different types of paper. Gold and silver nanoparticles show unique optical signatures, including sharp emission bandwidths and long lifetimes of the printed label, even under accelerated weathering conditions. Magnetic nanoparticles show distinct physical signals that depend on the size of the nanoparticle itself. They were also screen printed on different substrates and their magnetic signals read out using a magnetic pattern recognition sensor and a vibrating sample magnetometer. The novelty of our work lies in the demonstration that the combination of nanomaterials with optical and magnetic properties on the same printed support is possible, and the resulting combined signals can be used to obtain a user-configurable label, providing a high degree of security in anti-counterfeiting applications using simple commercially-available sensors.

Citations

Dec 13, 2016·Nanoscale·Leyre GomezTom Gregorkiewicz
Oct 13, 2017·Chemical Society Reviews·Swati ShikhaYong Zhang
Dec 12, 2018·Methods and Applications in Fluorescence·Mohammadreza Khodabakhsh, Ugur Unal
Apr 30, 2019·Journal of Vacuum Science and Technology. B, Nanotechnology & Microelectronics : Materials, Processing, Measurement, & Phenomena : JVST B·Olga A ShenderovaAlexander Zaitsev
Apr 12, 2021·International Journal of Pharmaceutics·Saad Asadullah ShariefEvangelyn Alocilja
Jan 31, 2018·ACS Applied Materials & Interfaces·Hongki KangYoonkey Nam
Dec 22, 2020·ACS Applied Materials & Interfaces·Rashmi JoshiRaghumani Singh Ningthoujam

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