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Description
Sensing smart labels are an essential component of the Internet of Things (IoT) paradigm to provide the necessary information and data. The emergence of printing technologies applied to the field of materials, enables low-cost, flexible, easy-to-integrate sensors with tailored response [1, 2]. The combination of printing techniques along with new materials with tailored electrical and magnetic properties results in printed electronics, allowing a new generation of smart sensors, radio-frequency identification (RFID), photodetectors devices, transistors, and batteries.
Smart labels obtained by printing techniques are suitable solutions for low-cost devices with integrated electronic circuit for information processing, able to be incorporated in a variety of substrates, including flexible ones, for object recognition and tracking, composed by different sensors, including, temperature, pressure, or humidity. Still, the widespread use of these labels into functional devices requires easy integration and power supply. In this work[3] a smart label was developed with integrated humidity sensor and printed battery. The smart label is composed by detection, communication, control, and energy subsystems. It is based on a screen printed RLC circuit and a printed humidity sensor with electrical linear response. The printed battery based on lithium iron phosphate as an active cathode material is fabricated with six single cells connected in series, leading to ≈100 mAh g-1. The printed humidity sensor shows a linear response with relative humidity (RH) variation sensitivity of 0.004/%. Thus, it is demonstrated the development of fully printed smart labels, improving integration into a variety of applications.
[1] J. Oliveira, V. Correia, H. Castro, P. Martins, and S. Lanceros-Mendez, "Polymer-based smart materials by printing technologies: Improving application and integration," Additive Manufacturing, vol. 21, pp. 269-283, 2018/05/01/ 2018.
[2] L. Atzori, A. Iera, and G. Morabito, "The Internet of Things: A survey," Computer Networks, vol. 54, no. 15, pp. 2787-2805, 2010/10/28/ 2010.
[3] N. Pereira, V. Correia, N. Peřinka, C. M. Costa, and S. Lanceros-Méndez, "All-Printed Smart Label with Integrated Humidity Sensors and Power Supply," vol. 23, no. 3, p. 2001229, 2021.
| Scientific Area | New principles and technologies for sensing |
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