In connection with the development of the Internet of Things, which combines an increasing number of smart devices into a single network, the need for biodegradable electronics is becoming more important.
Professor Sokhun “Sean” Choi of Bingemton received a $400,000 grant from the National Scientific Fund in 2023 to further his research on integrated paper electronics, known as “Papertronics”. A recent scientific publication showcases the latest breakthroughs that could revolutionize methods of environmental monitoring.
Choi pointed out that the main challenge with using paper for electronics is its high porosity and roughness. While these features are beneficial for paper liquid devices, they pose a significant issue for electronics. Previously, laminated paper with electronic components attached was used, maintaining the flexibility of paper but not fully utilizing its potential.
A team of scientists, led by Choi, has developed Papertronics, combining functional ink, capillary action that distributes ink inside the paper, and hydrophobic wax patterns that act as boundaries for circuits. Customizers, capacitors, and transistors are fully integrated into the paper foundations, enabling the creation of complete paper circuits that are foldable and stackable to form multi-layer printed circuit boards, all of which are biodegradable.
Choi highlighted that this new manufacturing method represents a significant advancement compared to previous developments in printed paper boards in 2022. In that iteration, achieving specific resistance or capacitance values was challenging, and ineffective materials had to be used.
Choi is now focusing on adapting paper electronics for broader applications. The next steps include refining packaging techniques for long-term device operation and developing other electronic components like inductors, diodes, or displays with improved density and performance.