| 초록 |
Triangular silver (Ag) nanoplates with sharp corners exhibit fascinating optical properties, but their triangular shapes make them thermodynamically unstable. In this work, we used this intrinsic instability to develop the colorimetric sensing platform for Br-. Specifically, we designed a system that uses the color and spectral changes associated with the spontaneous rounding of the sharp corners of triangular Ag nanoplates embedded in the hydrogel exposed to bromide ions (Br). Compared to the solution sensing system, our hydrogel based colorimetric showed several advantages. The hydrogel based sensing system can successfully determine the concentration of bromide ions based on the rate of change of the color and spectral features. The colorimetric and naked-eye detection suggests that they can be used effectively for analysis of Br- in natural waters. |
