# PAExM: label-free hyper-resolution photoacoustic expansion microscopy

> Research article (Optics Letters, 2020) · cited 35× · AI/ML

**Wikidata**: [openalex:W3102511369](https://www.wikidata.org/wiki/openalex:W3102511369)  
**Source**: https://4ort.xyz/entity/paexm-label-free-hyper-resolution-photoacoustic-expansion-microscopy