US 12,467,870 B2
Colorimetric chemical sensor with enhanced color sensitivity
Min Hu, Brooklyn, NY (US)
Assigned to Chemeleon Inc., Brooklyn, NY (US)
Filed by Chemeleon Inc., Brooklyn, NY (US)
Filed on Oct. 17, 2023, as Appl. No. 18/488,463.
Application 18/488,463 is a continuation of application No. 17/868,604, filed on Jul. 19, 2022, granted, now 11,815,464.
Application 17/868,604 is a continuation of application No. 16/381,436, filed on Apr. 11, 2019, granted, now 11,415,522, issued on Aug. 16, 2022.
Application 16/381,436 is a continuation of application No. PCT/US2017/056553, filed on Oct. 13, 2017.
Claims priority of provisional application 62/407,765, filed on Oct. 13, 2016.
Prior Publication US 2024/0053271 A1, Feb. 15, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 21/78 (2006.01); B82Y 20/00 (2011.01); G01N 31/22 (2006.01); G01N 33/14 (2006.01); G01N 21/77 (2006.01)
CPC G01N 21/78 (2013.01) [B82Y 20/00 (2013.01); G01N 31/22 (2013.01); G01N 33/14 (2013.01); G01N 2021/7756 (2013.01); G01N 2600/00 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A colorimetric sensor for detecting an analyte of interest in a fluid sample, the colorimetric sensor comprising:
a photonic structure comprising a first receptor, wherein the photonic structure is configured such that, when an analyte contacts the first receptor within the photonic structure, a refractive property of the photonic structure changes thereby to cause a detectable color change in the photonic structure,
wherein the first receptor comprises an optical absorber indicator, wherein a second receptor is part of a structure of the optical absorber indicator, such that, when the analyte contacts the second receptor, the analyte causes a photo-induced electron transfer to induce a color change of the optical absorber indicator.