Cho, Se Youn Abdulhafez, Moataz Tomaraei, Golnaz Najaf Lee, Jaegeun Bedewy, Mostafa 2026-02-03T08:31:00Z 2026-02-03T08:31:00Z 2026-02-02 2026-03 2050-7526 https://pubs.kist.re.kr/handle/201004/154162 Transparent conducting films (TCFs) were fabricated through the transformation of silk fibroin (SF), a renewable natural biopolymer, into carbon nanosheets (CNSs) via a catalyst free carbonization process. By adjusting the SF concentration, spin coating rate, and heat treatment temperature, the thickness of the CNS films was tuned from 3.7 to 38.8 nm, while maintaining uniform and smooth surfaces with Ra values between 0.28 and 0.62 nm. Structural analyses showed that pseudo-graphitic nanodomains gradually developed as the heat treatment temperature increased, and these changes directly influenced the optical and electrical properties. The optimized CNS films exhibited an optical transmittance of up to 95.7% at 550 nm and an electrical conductivity of 4.4 x 102 S cm-1, achieving a balanced combination of transparency and conductivity comparable to other solution-processed carbon electrodes. This study provides a scalable and sustainable method for producing ultrathin and flexible carbon-based TCFs and offers clear guidance on the relationships among processing conditions, structural features, and the resulting material properties using silk fibroin as a renewable precursor. English Royal Society of Chemistry Silk-derived carbon nanosheets for transparent conducting electrodes on flexible substrates Article 10.1039/d5tc03917g 1 Journal of Materials Chemistry C, v.14, no.10, pp.3890 - 3899 Journal of Materials Chemistry C 14 10 3890 3899 Y scie scopus 2-s2.0-105026731980 Materials Science, Multidisciplinary Physics, Applied Materials Science Physics Article; Early Access FILMS NANOFIBERS NANOTUBES XPS BOMBYX-MORI SILK GRAPHENE