Three hundred milligrams of polymer emulsion was diluted with
2.7 mL of water. Then, 200 µL of aqueous lucifer yellow-CH stock
solution (1 mg/mL) and 64 µL of aqueous HDTMA stock solution
(38 mg/mL) were added to 2 mL of ethanol. This solution was
added dropwise under vigorous stirring into 1 mL of the polymer
emulsion. To this emulsion 9 mL of water was added. The
emulsion was dialyzed against water. The reservoir was changed
four times every 3 days until it was colorless.
The composition of the sensor materials is summarized