ArticleScience advances2026
The optical nose: Monolayer sensitization of Au surfaces for plasmonic gas sensing.
Article in Science advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
9 authors.
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Abstract
Robust real-time gas sensing is important for many fields, including agriculture and health care analysis of breath/biofluid volatiles. Ammonia is ambiently present at parts per billion (ppb) to parts per million (ppm) levels, but current detection technologies suffer long measurement times, instability, cost, and issues with selectivity. Here, surface-enhanced Raman spectroscopy (SERS) is markedly improved through precision precleaning protocols, which allow surface sensitization of the metal facets using a water monolayer. Harnessing monolayer aggregates of densely packed gold nanoparticles with sub-nanometer spacing defined by rigid scaffolding molecules gives sub-ppm detection of ammonia at room temperature. Accessing the poorly studied high-wave number [>2500 per centimeter (cm
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Registered trials
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