Analysis of Defect Recovery in Reduced Graphene Oxide and Its Application as a Heater for Self-Healing PolymersClick to copy article linkArticle link copied!
- Hyun Gu KimHyun Gu KimDepartment of Materials Science and Engineering, Incheon National University, Incheon 22012, KoreaMore by Hyun Gu Kim
- Il-Kwon OhIl-Kwon OhSchool of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, KoreaMore by Il-Kwon Oh
- Seungmin LeeSeungmin LeeSchool of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, KoreaMore by Seungmin Lee
- Sera Jeon
- Hyunyong ChoiHyunyong ChoiSchool of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, KoreaMore by Hyunyong Choi
- Kwanpyo Kim
- Joo Ho YangJoo Ho YangDepartment of Organic Materials and Fiber Engineering, Soongsil University, Seoul 06978, KoreaMore by Joo Ho Yang
- Jae Woo ChungJae Woo ChungDepartment of Organic Materials and Fiber Engineering, Soongsil University, Seoul 06978, KoreaMore by Jae Woo Chung
- Jaekwang LeeJaekwang LeeDepartment of Physics, Pusan National University, Busan 46241, KoreaMore by Jaekwang Lee
- Woo-Hee Kim*Woo-Hee Kim*E-mail: [email protected]Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, KoreaMore by Woo-Hee Kim
- Han-Bo-Ram Lee*Han-Bo-Ram Lee*E-mail: [email protected]Department of Materials Science and Engineering, Incheon National University, Incheon 22012, KoreaMore by Han-Bo-Ram Lee
Abstract

Reduced graphene oxide (RGO) obtained from graphene oxide has received much attention because of its simple and cost-effective manufacturing process. Previous studies have demonstrated the scalable production of RGO with relatively high quality; however, irreducible defects on RGO deteriorate the unique intrinsic physical properties of graphene, such as high-mobility electrical charge transport, limiting its potential applicability. Using the enhanced chemical reactivity of such defects, atomic layer deposition (ALD) can be a useful method to selectively passivate the defect sites. Herein, we analyzed the selective formation of Pt by ALD on the defect sites of RGO and investigated the effect of Pt formation on the electrical properties of RGO by using ultrafast terahertz (THz) laser spectroscopy. Time-resolved THz measurements directly corroborated that the degree of the defect-recovering property of ALD Pt-treated RGO appearing as Auger-type sub-picosecond relaxation, which is otherwise absent in pristine RGO. In addition, the conductivity improvement of Pt-recovered RGO was theoretically explained by density functional theory calculations. The ALD Pt-passivated RGO yielded a superior platform for the fabrication of a highly conductive and transparent graphene heater. By using the ALD Pt/RGO heater embedded underneath scratched self-healing polymer materials, we also demonstrated the effective recovery property of self-healing polymers with high-performance heating capability. Our work is expected to result in significant advances toward practical applications for RGO-based flexible and transparent electronics.
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