Patent ID: 11898957
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A method for determining whether a selected analyte is present in a gaseous sample, the method comprising:
(a) contacting a sample to an analyte sensor comprising:
(i) a transparent substrate; and
(ii) an analyte-sensitive film on a surface region of the substrate, wherein the analyte-sensitive film comprises a plurality of metallic nanoparticles having an affinity for the analyte;

(b) maintaining the analyte-sensitive film at a substantially constant selected temperature;
(c) while performing step (b):
(i) directing light along a first path extending through the transparent substrate to the analyte-sensitive film, and
(ii) detecting a localized surface plasmon resonance (LSPR) signal from the analyte-sensitive film; and

(d) determining whether the analyte is present in the sample based on a LSPR signal detected from the analyte-sensitive film.