Liquid crystal (LC) droplets exhibit unique and sensitive response behaviors to surface absorptions, making them promising candidates for sensing aplications. Here, we have developed a label-free, portable, and cost-effective sensor for the specific and rapid detection of silver ions (Ag) in drinking-water samples. To achieve this, we have modified cytidine into a surfactant (denoted as C10-M-C) and anchored it onto the surface of LC droplets. The specific binding ability between cytidine and Ag enables LC droplets anchored with C10-M-C to respond rapidly and specifically to Ag ions. Furthermore, the sensitivity of the response meets requirements for the harmless concentration of Ag in drinking-water. The sensor we developed is label-free, portable, and cost-effectively. We believe that the sensor reported here can be applied to the detection of Ag in drinking-water and environmental samples.
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| http://dx.doi.org/10.1016/j.jcis.2023.06.111 | DOI Listing |
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