TRACK Core: Towards a world-friendly asset tracker

2022 SODAQ, manufacturer of the general purpose asset tracker: TRACK, committed itself to take environmental and social responsibility and got rebranded as a ‘World-friendly IoT’ company. A Life Cycle Assessment (LCA) for the current TRACK product, performed by an external company, proved that decreasing the impact of the enclosure might provide...

ZnO Nanoparticle Printing for UV Sensor Fabrication

In this work, a novel microfabrication-compatible production process is demonstrated and used to fabricate UV photoresistors made from ZnO nanoparticles. It comprises a simple room-temperature production method for synthesizing and direct-writing nanoparticles. The method can be used on a wide range of surfaces and print a wide range of...

3D printing electronics towards flexible tactile sensors

The research described in this thesis explores the field of 3D printing technologies in the fabrication of printed, flexible tactile sensors and explores new possibilities and opportunities in the fabrication. The research is aiming at new ways of applying 3D printing fabrication techniques to develop easily applicable sensing structures to...

FlexTECH: Taking the next step with 'Printed Electronics'

By combining the recent innovations of 4D Printing and Printed Electronics, the Emerging Materials group at the Delft University of Technology has developed a new, printable, self-actuatable material that can continuously change shape in a programmable manner. A specifically designed strip of conductive and non-conductive materials exhibits...

Effect of particle contact on the electrical performance of NTC-epoxy composite thermistors

As demand rises for flexible electronics, traditionally prepared sintered ceramic sensors must be transformed into fully new sensor materials that can bend and flex in use and integration. Negative temperature coefficient of resistance (NTC) ceramic thermistors are preferred temperature sensors for their high accuracy and excellent stability,...

Design of 3D Wireless Power Transfer System Based on 3D Printed Electronics

2D coil design limits the use of wireless power transfer (WPT) in many products with freeform outer shapes. In this paper, enabled by 3D printed electronics, we propose a systematic approach to design and fabricate 3D coils for WPT. Based on the circular spiral and rectangular spiral patterns, 3D receiver and transmitter coils can be...

Enabling the recycling of 3D printed electronics in a circular economy

This thesis describes the research on design measures and new recycling methods to enable the recycling of 3D printed electronics. By looking into methods to release metals from polymer substrate and design interventions to enable predictable fracturing of 3D printed structures in a shredder, a step towards the recycling of valuable metals from...

Large-Area All-Printed Temperature Sensing Surfaces Using Novel Composite Thermistor Materials

Surfaces which can accurately distinguish spatial and temporal changes in temperature are critical for not only flow sensors, microbolometers, process control, but also future applications like electronic skins and soft robotics. Realizing such surfaces requires the deposition of thousands of thermal sensors over large areas, a task ideally...

3D Printed Electronics: a case study on Wireless Power Transfer

A recent development on the field of additive manufacturing is the ability to print conductive materials alongside non-conductive materials, predominantly plastics. With the addition of the possibility to insert external components during the manufacturing process, this allows for the integration of mechanical and electrical functionality into a...

Liquid Silicon for Printed Polycrystalline Silicon Thin-Film Transistors on Paper

ProxiPad: A unibody proximity sensor touchpad demonstrates the new era of 3D Printed Electronics

Printed graphene and silicon