A colorimetric method for fast, simple, and selective detection of Cu²⁺ was developed using I^–-mediated etching of triangular gold nanoplates (AuNPLs). The method was based on our finding that Cu²⁺ efficiently promoted this etching in the presence of SCN^–. The etching process was accompanied by a dramatic color change from blue to red, allowing for visual and spectroscopic detection of Cu²⁺ with detection limits of 10 and 1 μM, respectively. When molecular recognition by a DNA aptamer was incorporated into this method, visual detection of chloramphenicol was also achieved with a detection limit of 5 μM.

中文翻译：

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碘介导的三角形金纳米板蚀刻对铜离子的比色传感和氯霉素的传感

用于快速，简单的Cu的比色方法，和选择性检测²⁺使用我开发^-三角金纳米片（AuNPLs） -介导的蚀刻。该方法是基于我们的发现，铜²⁺有效地促进该蚀刻在SCN的存在^- 。蚀刻过程伴随着从蓝色到红色的显着颜色变化，从而允许分别以10和1μM的检测限对Cu ²⁺进行视觉和光谱检测。当将DNA适体的分子识别结合到该方法中时，氯霉素的目视检测也达到了5μM的检测极限。