Strain-Induced Optical Modulation in WS₂ Nanoscrolls

Abstract

Two-dimensional transition metal dichalcogenides (TMDs) are promising materials for next-generation electronics due to their tunable band gaps, high carrier mobility, and mechanical flexibility. One manifestation of this flexibility is the formation of nanoscrolls from tungsten disulfide (WS₂) flakes. In this study, the optical properties of flat and rolled WS₂ films were compared using Raman and photoluminescence spectroscopy. Measurable changes in spectral features were observed between the two structures, indicating that nanoscroll formation significantly alters optical behavior. This project aims to develop an efficient method for forming WS₂ nanoscrolls, compare spectroscopic responses between flat and rolled regions, and evaluate how strain induced by scrolling impacts the material’s optical properties.