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글번호 548577
제목 Department of Physics developed commercial silk-based electronic yarns using microwave irradiation
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작성일 2019.09.30 11:27:33 조회수 33
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simple The research conducted by Department of Physics at INU was published on SCI-level journal, ACS Applied Materials & Interfaces, impact factor=8.456, with the title of “Commercial Silk-Based Electronic Yarns Fabricated Using Microwave Irradiation”.
newsDay 2019.09.24
Department of Physics at Incheon National University developed commercial silk-based electronic yarns using microwave irradiation.

Electronic textiles (e-textiles) are being developed because of their potential applications in wearable and flexible electronics. When treated by heating, β-sheet Structure is converted into Carbocyclic compound, which is crystallized by hydrogen bond among main chains of silks, and heat-transferred into pyroprotein which is outstanding in electrical properties. However, complex procedures and chemical agents are required to synthesize carbon-based e-textiles. Pyroprotein-based e-textiles, obtained by the pyrolysis of silk proteins, consume large amounts of time and energy due to the high-temperature process (from 800 to 2800 °C).

In this study, the team reports a novel method of fabricating pyroprotein-based electronic yarns (e-yarns) using microwave adiation. Microwaves were applied to pyroprotein treated at 650 °C to remove numerous heteroatoms in a short time without the high-temperature process and chemical agents. The structural modulation was confirmed by Raman spectroscopy and X-ray photoelectron spectroscopy.

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The team also found a reduction in heteroatoms and enlargement of the carbon region. The temperature-dependent resistance was well explained by the fluctuation-induced tunneling model, which also showed the structural modification.

The electrical conductivity of the fabricated e-yarns was comparable to that of pyroprotein-based e-textiles heat-treated at 1000 °C (order of 102 S/cm) and showed electrical stability even under bending and needlework.

This research started with ideas of Jun Woo Jeon(Ph.D. in physics), Deokgyu Na(co-first author), Junsik Choi(co-first author), and Jaehee Lee. Significantly, experiments were conducted and the academic journal was published under the guidance of Jun Woo Jeon(academic advisor Byunghoon Kim).

*D.N. and J.C. contributed equally to this work.

Funded by INU and National Research Foundation of Korea, the researchwas published on SCI-level journal, ACS Applied Materials & Interfaces, impact factor=8.456, under the title of “Commercial Silk-Based Electronic Yarns Fabricated Using Microwave Irradiation”.
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