| 초록 |
Elemental arsenic and its compounds are highly toxic substances and widely distributed in the earth's crust and natural water. Exposure to arsenic (As3+) in excess of certain concentrations (> 10 μg L-1) can cause a variety of adverse health effects, including dermal changes and carcinogenic effects. However, current methods for As3+ detection are not suitable for the third world’s people suffering from As3+ poisoning due to high cost and complicated procedures. In this study, we suggest a simple and sensitive liquid crystal (LC) sensor that can optically report the presence of As3+ selectively in aqueous systems. Concretely, the sensor consists of LC film and self-assembled biomass carbon dots (BCDs) coated with L-cysteine (Cys) at the LC-water interface. When As3+ binds to Cys in the BCDs, the ordering of LCs changes and reports it via a macroscopic optical transition. Therefore, integration of inexpensive and easily obtainable BCDs and LCs with automatic optical reporting can overcome the limitations of conventional As3+ sensors. This work was supported by the Korea National Research Foundation (NRF-2020K1A3A1A21040504 & 2021R1A4A1030944) |
