| 초록 |
Contamination of the water and soil by arsenic (As3+) has been a gloval issue because high concentration of As3+ (> 10 g L-1) can cause skin cancers. However, several methods for As3+ detection are not affordable for the third world's people suffering from As3+ poisoning due to high cost and complex procedure. In this study, we propose a simple and vesatile design of liquid crystal (LC) sensor that can optically report the presence of As3+ in aqueous systems. Specifically, the sensor is derived carbon dots (BCDs) coated with L-cysteine. The selective adsorption of As3+ by L-cysteine in BCDs cause molecular reorientation of LCs, leading to a macroscopic optical signal. Thus, the use of inexpensive BCDs and autonomously optically reporting LCs can overcome the limits of conventional As3+ sensors. This work was supported by the Korea National Research Foundation (NRF-2020K1A3A1A21040504 & 2021R1A4A1030944) |
