Hello everyone,

I’m currently working on transferring a 2D material onto a new substrate using PMMA as a transfer agent. After successfully transferring the 2D material, I attempted to remove the PMMA by etching it with acetone, but the PMMA remains largely intact, and the etching is not progressing as expected.

Has anyone encountered a similar issue with PMMA etching in acetone? Are there alternative methods or conditions (e.g., temperature, concentration, or other solvents) that could improve the etching process? Any suggestions or insights would be greatly appreciated.

Thank you!