Analysis of Defect Recovery in Reduced Graphene Oxide and Its Application as a Heater for Self-Healing Polymers

• DOI: 10.1021/acsami.8b19955
• Publication Date: 2019-04-09T21:41:39Z
• Authors: Hyun Gu Kim; Il-Kwon Oh; Seungmin Lee; Sera Jeon; Hyunyong Choi; Kwanpyo Kim; Joo Ho Yang; Jae Woo Chung; Jaekwang Lee; Woo-Hee Kim; Han-Bo-Ram Lee
• Keywords: Passivation

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