| 초록 |
Visual colorimetric sensors based on reusable substrates (cellulose, polyester, and non-woven fabric) are well-suited for the on-site detection and monitoring of environmental contaminants. Their ability to sense harmful substances rapidly will have a significant impact on a variety of danger warning and emergency response systems. Here, we report a promising method for detecting inactive cesium (Cs) through the observation of color changes in sensor strips impregnated with a Chrysoidine G (CG) chemo-indicator. This chemo-indicator is designed to exhibit a powerful detection capability featuring high selectivity and sensitivity to inactive Cs, by means of color discrimination from light yellow to red orange. Interestingly, a portable smart phone camera, which determined the relative red/green/blue (RGB) values within three seconds, provided us with further information on environmental pollution. Using our new colorimetric reusable sensor (CRS) platform, the CRS shows excellent detection linearity (R2=0.97) of inactive Cs from the contaminated water. Our results will pave the way for portable and versatile sensors and, in turn, for the detection and monitoring of toxic contaminants. |
