The change in color is clearly visible to the naked eye, Pernice said and the device is usable multiple times. After performing the measurements, researchers found that the sample gradually regained its original green color after less than one minute of exposure in air. He added that the sensor does not pose environmental concerns for disposal after use, since it is made of all non-toxic materials, and that it also does not react to acetone, one of the many substances that can be falsely identified as ethanol by some breath machines.
The device is currently able to detect alcohol at much higher concentrations compared to other portable alcohol sensors. In the coming months, the researchers hope to explore the device's use at lower concentrations as well.
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