CNU graduate students are drawing attention for developing an innovative method to create electrical circuits on paper with pencils.

Kim Jun-seo and Ahn Da-hye, graduate students of the MA program of the CNU School of Polymer Science and Engineering, developed an electric circuit that can be created by using paper with a rough surface (like a cement bag) as a substrate and drawing a circuit on it with a graphite pencil.

This electric circuit can be used for speakers, LED bulbs, touch pads, and resistive heating elements. Also, because of the nature of the paper, it can be folded repetitively 100 times in the horizontal grain direction with repeatable stability.

This research paper was published as an online supplementary cover model on January 26th in ACS Omega (Impact factor 2.87), receiving favorable reviews for implementing a disposable paper device.

This technology is also evaluated as an environmentally friendly technology that uses graphite instead of the metal component circuit used in the existing technology and is expected to present a new opportunity for the development of various disposable devices.

This research was conducted with the support of the Korea Research Foundation's Mid-Career Researcher Program and the Ministry of Trade, Industry, and Energy's Industrial Core Technology Development Project. Corresponding authors are Professor Kim Yong-am and Park Jong-jin, while the graduate students are co-first authors.