# Parts-per-trillion-level detection of nitrogen dioxide by cantilever-enhanced photo-acoustic spectroscopy

> Research article (Optics Letters, 2015) · cited 64× · AI/ML

**Wikidata**: [openalex:W1883060380](https://www.wikidata.org/wiki/openalex:W1883060380)  
**Source**: https://4ort.xyz/entity/parts-per-trillion-level-detection-of-nitrogen-dioxide-by-cantilever-enhanced-photo-acoustic-spectroscopy