Ultra-sensitive and selective gas sensing plays a role in defense and environmental mentoring. Current highly sensitive techniques such as graphene lack selectivity and highly selective techniques such as microresonator soliton dual comb spectroscopy techniques lack the sensitivity of the techniques such as graphene. We have previously developed an ultra-sensitive biosensor known as FLOWER that enables the detection of single macromolecules. FLOWER is based on optical microresonator technology. Here, we adapt FLOWER for highly sensitive and selective chemical sensing by combining it with custom synthesized sorbent polymer coatings. We demonstrate part-per-trillion selective detection of DIMP as well as formaldehyde and ammonia.

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Tsu-Te Judith Su, "Part-per-trillion selective gas sensing using FLOWER," Proc. SPIE PC12541, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIV, PC1254101 (Presented at SPIE Defense + Commercial Sensing: May 01, 2023; Published: 14 June 2023); https://doi.org/10.1117/12.2663399.6328610889112.