Several new techniques are emerging to use digital display devices as new type of light source for analytical purpose.
We demonstrate the use of a liquid crystal display (LCD) computer screen as excitation light source for determining
gaseous oxygen contents over a relatively large area. Meso-scale device platforms are prepared with glass plates
incorporating fluidic channels and commercial oxygen sensor patches. Fluorophores are excited by blue wavelength
range from the LCD computer screen. The sensor signals exhibit a good linear relationship with respect to the oxygen
content. The display devices, with a capability of uniform illumination over a large area for variable wavelengths, have
a great potential as light source for high-throughput, multiple-analyte, quantitative chemical analysis.
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