Abstract

The general use of smartphones assigns additional relevance to QR codes as a privileged tool to the Internet of Things (IoT). Crucial for QR codes is the evolution to IoT-connected smart tags with enhanced storage capacity and secure accesses. Using the concept of super-modules (s-modules) built from adjacent spatial multiplexed modules with regular geometrical shapes, assisted by colour multiplexing, we modelled and design a single QR code with, at least, the triple storage capacity of an analogous size black/white QR code, acting as a smart-tag ensuring restrict access and trackability. The s-modules are printed using luminescent low-cost and eco-friendly inks based on organic-inorganic hybrids modified by lanthanides with multiplexed colour emission in the orthogonal RGB space. The access to the restrict information is attained only under UV irradiation and encrypted for secure transmission. The concept of active QR codes for smart trackability and IoT was materialised through the development of a free friendly-user mobile app.

Details

Title
Super modules-based active QR codes for smart trackability and IoT: a responsive-banknotes case study
Author
Ramalho João F C B 1   VIAFID ORCID Logo  ; Correia Sandra F H 1 ; Fu Lianshe 1 ; Dias, Lília M, S 1 ; Adão Pedro 2 ; Mateus Paulo 3 ; Ferreira, Rute A, S 1   VIAFID ORCID Logo  ; André, Paulo S 4   VIAFID ORCID Logo 

1  University of Aveiro, Department of Physics and CICECO - Aveiro Institute of Materials, Aveiro, Portugal (GRID:grid.7311.4) (ISNI:0000000123236065) 
2  Universidade de Lisboa, Department of Computer Science and Engineering and Instituto de Telecomunicações, Instituto Superior Técnico, Lisbon, Portugal (GRID:grid.9983.b) (ISNI:0000 0001 2181 4263) 
3  Universidade de Lisboa, Department of Mathematics and Instituto de Telecomunicações, Instituto Superior Técnico, Lisbon, Portugal (GRID:grid.9983.b) (ISNI:0000 0001 2181 4263) 
4  Universidade de Lisboa, Department of Electrical and Computer Engineering and Instituto de Telecomunicações, Instituto Superior Técnico, Lisbon, Portugal (GRID:grid.9983.b) (ISNI:0000 0001 2181 4263) 
Publication year
2020
Publication date
2020
Publisher
Nature Publishing Group
e-ISSN
23974621
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41528-020-0073-1
ProQuest document ID
2488773056
Copyright
© The Author(s) 2020. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.