Ultrafast transient s-SNOM nanoscopic measurement of charge transfer between a ruthenium complex and a MoS2 monolayer

Abstract

We studied exciton diffusion and charge transfer between a metal–organic complex and a MoS₂ monolayer using transient s-SNOM nanoscopy. Measuring vibrational ground state bleach dynamics, we found an exciton diffusion rate of ∼8 × 10⁻⁴ cm² s⁻¹. Nanoscale resolution avoids spatial averaging errors, offering insights for optimizing excitonic processes in light-harvesting devices.