<p>➀ This study explores a new method to improve the stability of graphene membranes in transmembrane nanofluidic devices by applying a pyrene-based coating.</p><p>➁ The researchers developed pyrene-functionalized SiN substrates for graphene membranes and tested device performance by measuring ion transport.</p><p>➂ The pyrene layer significantly improved the performance of graphene transmembrane devices, reducing delamination and ion leakage.</p>