Eco-friendly and Bioderived, Biodegradable Polymer for 2D Device Fabrication

Our pursuit of two-dimensional (2D) materials, like graphene and molybdenum disulfide (MoS₂), is driven by their exceptional optical and electronic properties. Often 2D device fabrication requires transferring materials grown via chemical vapor deposition (CVD) onto a target substrate, assisted by polymers. This study pioneers a bio-derived, biodegradable polymer for 2D materials transfer. Optimizing various parameters, we successfully fabricated graphene and MoS₂ based 2D devices using poly angelica lactone. Our polymer was thoroughly characterized using FTIR, GPC, and DSC. We employed SEM and Raman spectroscopy to ensure the quality of transferred materials. Notably, for graphene we achieved strain and carrier concentration level below 0.5% and 0.5 x 10¹² cm^-2 respectively. Disorder in graphene monolayers was quantified by Raman Spectroscopy, revealing our polymer's superiority to conventional and Soxhlet extractor-based methods. In addition, our biodegradable polymer underwent rigorous biodegradability testing, demonstrating efficient removal from graphene films with yeast. This eco-friendly approach opens a significant stride towards sustainable 2D device fabrication.