1. Department of Polymer Science and Engineering Inha University Incheon 402‐751 South Korea
2. Department of Materials Science and Engineering University of Illinois at Urbana − Champaign Urbana IL 61801 USA
3. Institute of Advanced Composite Materials Korea Institute of Science and Technology (KIST) 92 Chudong‐ro, Bongdong‐eup Wanju‐gun Jeonbuk 55324 South Korea
4. Division of Electron Microscopic Research Korea Basic Science Institute Daejeon 34133 South Korea
5. Carbon Composite Materials Research Center Korea Institute of Science and Technology 92 Chudong‐ro, Bongdong‐eup Wanju‐gun Jeonbuk 55324 South Korea
6. Department of Chemical Engineering Kangwon National University Samcheok 245‐711 South Korea