Silk Chemistry Strategy to Fabricate Carbonized Silk Thin Films with Controlling the Location of Heteroatom Doping
발표자
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초록
내용
Silk fibroin (SF) from the cocoon of domesticated Bombyx mori silkworms is a well-known natural biopolymer along with chitin and cellulose and has excellent mechanical properties, controllable biodegradability, and biocompatibility. Recent interest in the use of SF as a carbon resource model has created new opportunities for wearable electronics, energy conversion and storage devices, and sensing systems. However, most of the research have focused on the transformation of beta-sheet crystallites of SF into sp2-hybridized carbon structures through pyrolysis without the use of reactive amino acid residues that provide opportunities to functionalize SF with extrinsic heteroatom-containing molecules. In this work, we explored the multiple reaction pathways to conjugate nitrogen-containing molecules into reactive amino acid residues of SF. The location of nitrogen-doped in SF and the effect of pyrolysis temperature on the nitrogen content were investigated using Raman spectroscopy, X-ray, XPS, and EDS.