Journal
ANALYTICAL CHEMISTRY
Volume 90, Issue 8, Pages 5375-5380Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.8b00506
Keywords
-
Categories
Funding
- NIBIB/NIH [1U01EB021980-01]
- NSFC [21575062]
Ask authors/readers for more resources
Colorimetry detects a color change resulted from a chemical reaction or molecular binding. Despite its wide-spread use in sensing, continuous monitoring of analytes with colorimetry is difficult, especially when the color-producing reaction or binding is irreversible. Here, we report on a gradient-based colorimetric sensor (GCS) to overcome this limitation. Lateral transport of analytes across a colorimetric sensor surface creates a color gradient that shifts along the transport direction over time, and GCS tracks the gradient shift and converts it into analyte concentration in real time. Using a low cost complementary metal-oxide semiconductor imager and imaging processing algorithm, we show submicrometer gradient shift tracking precision and continuous monitoring of ppb-level ozone.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available